press-vac PV阀

管道英文缩写译文/wingman1985/archive/2008/12/10/1240055.htmlA Anchor 固定ABS *Absolute 绝对的AISI *American Iron andSteel Institute 美国钢铁学会ANSI *American NationalStandards Institute 美国国家标准学会API *American Petroleum Institute 美国石油学会APPROX *Approximate 大约，近似的ASB Asbestos 石棉ASME *American Society Of Testing Material 美国机械工程师协会ASSY *Assembly 装配，组装ASTM *American Society OfTesting Material 美国材料实验协会ATM *Atmosphere 大气压AWG *American Wire Gage 美国线规AWS *American Wel**** Society 美国焊接协会AWWA *American Water WorksAssociation 美国水工协会BBB Bolted Bonnet 栓柱连接的阀盖BB By Buyer 买方供货B-B Beveled End-Beveled End 两端为坡口端BC Bolt Circle 螺栓中心圆B.C Bolted Cover(cap) 螺栓连接的阀兰盖（帽）BE Beveled End (for wel****) 坡口（焊接用）B.E Bell End 承口BEP Both Ends Plain 两端平BET Both Ends Threaded 两端带螺纹BL Battery Limit 装置区边界BF Blind Flange 法兰盖BLD Blind 盲板BLDG *Buil**** 建筑物BM Bill Of Material 材料表BOP Bottom Of Pipe 管底B-P Beveled End —Plain End 坡口端.平端BV Butterfly valve 蝶阀BWG * Birmingham Wire Gage 伯明翰线规BW Butt Weld 对焊CC Cap 管帽C-C Center to Center 中至中C-E Center to End 中至端面C-F Center to Face 中至面CH-OP Chain Operated 链条操纵的CH.PL Checkered Plate 花纹钢管C.I *Cast Iron 铸铁CL *Class 英制压力等级，等级，种类CLEAR Clearance 间隙COD Continued on Drawing 接续图COL *Column 柱，塔CONC Concentric 同心的CONN Connection 连接，接口CONT *Continue 连续CONT.V. Control Valve 控制阀CPLG Coupling 管接头，连轴节C.R. Concentric Reducer 同心异径管C.S. *Carbon Steel 碳钢C.S. Cold Spring 冷紧C.S.C. Car Seal Close 在关闭状态下封住C.S.O. Car Seal Open 在开启状态下封住CUST Customer 客C.V Check Valve 止回阀DDEG *Degree 度DF Drain funnel 排液漏斗DIA *Diameter 直径DIM *Dimension 尺寸DISCH *Discharge 出口，排出Diaphragm VELVE 隔膜阀DMF Double Male And Female 双重凹凸DN *Double Male And Female 公称直径DN Down 下DR Drain 排液DS Directional Stop 定向限为架DWG *Drawing 图EE *East 东EC External Coating 外面涂防腐层ECC Eccentric 偏心EFW Electric Fusion Welded 电容焊的EL(ELEV) *Elevation 标高；立面ELL Elbow 弯头EQIOP Equipment 设备，装置EQUIV Equivalent 相当的E.R. Eccentric Reducer 偏心异经管ERW Electric Resistance Welded 电阻焊的EW Eye Washer & Shower 洗眼器及淋浴器EXP.JT Expansion Joint 膨胀节FFDN Foundation 基础FF Flat Faced Or Full Faced 全平面；满平面F-F Face To Face 面至面FGW Fusion Gas Wel**** 气熔焊FIG *Figure 图FL Floor 楼面FLEX TUBE Flexible Tube 挠性管FLG Flange 法兰FLGD Flanged 法兰式的FLGF Flanged Face 法兰面FOB Flat On Bottom 底面平FOT Flat On Top 顶面平FP Fix Point 固定点FS Forged Steel 锻钢FTF Fitting To Fitting 管件直连FTG Fitting 管件FURND Furnished 提供的，装设的FW Field Weld 现伤焊GG Guide 导向GA *Gage 表，表压，规（线规）GALV *Galvanize 镀锌GL Ground Level 地面GLV Globe Valve 截止阀GEAR OP Gear Operated 齿轮传动的GMAW Gas Metal Arc Wel**** 金属极惰气体保护焊GSKT Gasket 垫片GTAW (Inert)Gas Tungsten Arc Wel**** 惰性气体保护钨极电弧焊GV Gate Valve 闸阀HH Hanger 吊架HC Hose Connection 软管接头H.CPLG Half Coupling 半节管接头HDR Header 总管HEX *Hexagon 六角形HF Hard Alloy Face on阀内件（阀心）为Valve Trim 硬质合金密封面HH Hand Pole 手孔HOR Horizontal 水平的H.P *High Pressure 高压HS Hose Station 软管IID *Inside Diameter 内径IN *Inch 英寸INS Insulation 隔热INST Instrument 仪表INV Invert (inside bottom of pipe) 管子内底IPS Iron Pipe size 铁管尺寸ISO Isometric Drawing 周测图（空视图）I.S.B.L Inside Battery Limit 装置边界内恻ISNS Inside screw & Non-rising Stem 内螺纹非升杆ISRS Inside screw & Rising stem 内螺纹升杆JJT Joint 接头JS Jack Screw 顶开（起）螺栓LLC Locked Closed 在关闭状态下锁定LEP Large end plain 大端为平的LET Large end Threaded 大端带螺纹LG Long 长LGF Lens Gasket Face 透镜垫连接面L.H.THD Left Hand Thread 左螺纹LIFT Lift Type 升降式LJ Lap Joint 搭接LJF Lap Joint Flange 松套法兰LO Locked Open 在开启状态下锁定L.P. Low Pressure 低压LR Long Radius 长半径LRE Long Radius Elbow 长半径弯头LTG Large Tongue & Groove 大椎槽MMATL Material 材料MAX Maximum 最大MB Machine Bolt 机器螺栓（单头）MF Male and Female 凸和凹MFG Manufacture 制造MF *Manufacture 制造厂MH Manhole 人孔MI Malleable Iron 可锻铸铁MIN *Minimum 最小MJ Mechanical Joint 机械接头M.L Match Line 连续线MSS * Manufacturers Standardization Society of the Valve and Fittings Industry, Inc.美国阀门和管件制造商标准化协会MTO Material take-off 材料统计MW Minimum Wall 最小壁厚M.W. Mineral Wool 矿（物）棉NN *North 北NB Nominal Bore 公称孔径N.B. Non-Bonnet 无阀盖NC Normally Closed 常闭NIP Nipple 短管NO Normally Open; 常开*Number号；数量NO INS No Insulation 不隔热NOM Nominal 公称的；额定的NOZ Nozzle 管口NPS Nominal Pipe Size 公称管径NPSH Net Positive Suction Head 净正吸入压头NPT *American National Taper 美国锥管螺纹Pipe ThreadNS Nominal Size 公称直径NV Needle Valve 针形阀OOD *Outside Diameter 外径OET One end Threaded 一端带螺纹OR Outside Radius 外半径ORF Orifice 孔板ORIENT Orientation 方位OS & Y Outside Screw and Yoke 外螺纹阀杆和阀轭OSNB Outside Screw Non-Bonnet 外螺纹无阀盖PP Plug 堵头PAP Piping Arrangement Plan 管道布置平面图PB Pressure Seal Bonnet 压力密封的阀盖P-B Plain End –Bevel End 平端—坡口端PC Pressure Seal Cap 压力密封的阀帽P.C.D. Pitch Circle Diameter 节圆直径PE Plain End (not beveled) 平端（无坡口）PF Platform 平台PID Piping & Instrument Diagram管道及仪表流程图PN *Nominal Pressure 公称压力PN Plant North 工厂北向POS point of Support 支承点P-P Plain End—Plain End 两端为平端PREP Preparation 加工准备PSIA *Pounds Per Square InchAbsolute 磅/PSIG Pounds Per Square Inch Gage 磅/PT Point 点PTFE *Polytetrafluoroethylene 聚四氟乙烯PT.NO Part No. 件号PV Plug Valve 旋塞阀PVC *Poly Vinyl Chloride 聚氯乙烯QQTY *Quantity 数量RR *Radius 半径RED Reducer 异径管REF Reference 参考REINF Reinforce 加强REQD Required 需要；申请REV *Revision 修改RF Raised Face 凸面RG Ring Gasket 环形垫片R.H.THD Right Hand Thread 右螺旋RJ Ring Joint 环垫接头RO Restriction Orifice 限流孔板RPM *Revolutions Per Minute 转/分RPS *Revolutions Per Second 转/秒RS Resting Support 支承架，滑动架RTJ Ring Type Joint（见RJ）RV Relief Valve 安全泄液阀SS *South 南S Spring 弹簧（管架用）SAW (Automatic)Submerged Arc Wel**** 自动埋弧焊SB Stud Bolt 双头螺栓SB Screwed Bonnet 螺纹阀盖SC Sample Cooler 取样冷却器SCH *Schedule 管壁厚系列号SCRD Screwed 螺纹SEP Small end Plain 小端为平的SET Small end Threaded 小端带螺纹SF Semi-Finished 半光SG Sight Glass 视镜SH Surface Hard Facing 硬质密封面SK Sketch 草图SMAW Shielded Metal Arc Wel**** 有保护的金属电弧焊SMLS Seamless 无缝SN Swaged Nipple 异径短管SO Slip – On 滑套SOF Slip – On Flange 滑套法兰SPEC *Specification 规定，说明SPL Sound Pressure Lever 升压水准SQ *Square 方的，平方SR Shout Radius 短半径SRE Short Radius Elbow 短半径弯头SS *Stainless Steel 不锈钢ST Steam Trap 蒸汽疏水阀STD *Standard 标准STG Small Tongue & Groove 小椎槽面STL *Steel 钢STM Steam 蒸汽STM.TR Steam Tracing 蒸汽拌热SUCT Suction 吸入口SV Safety Valve 安全泄气阀SW Socket Weld 承插焊SWG Swage 锻造，模锻SWMG Swing Type 旋启式SYM Symmetrical 对称的TT Tee 三通TE Threaded End 螺纹端TEMP *Temperature 温度TG Tongue & Groove 椎槽THD *Threaded 螺纹的THK *Thickness 厚度TL Tangent Line 切线TN True North 真实北向TOC Top of Concrete 混凝土北向TOP Top of pipe 管顶TOS Top of Support 支架顶面Top of Steel 钢结构顶面TYP Typical 典型的UUB Union Bonnet 带活接头的阀盖UC Union Cap 带活接头的阀帽UN Union 活接头VV Valve 阀VAC Vacuum 真空VAR Variable 可变的VERT Vertical 垂直的VOL *Volume 卷，册，容量，体积WW *West 西WB Weld Branch 焊接支管WC Weld Cap 焊接管帽WD Width 宽度WE Weld End 焊接端绝对标高 absolute elevation海平面标高 over-sea mean level (OSL)标高，立面 elevation (EL)混凝土顶面 top of concrete架顶面 top of support (TOS)钢结构顶面 top of steel梁项面 top of beam (TOB)支撑点 point of support (POS)管顶 top of pipe (TOP)管底 bottom of pipe (BOP)沟底 bottom of trench管子内底 invert (inside bottom of pipe)底平 flat on bottom (FOB)顶平 flat on top (FOT)工作点 working point (W.P.)面至面 face to face (F-F)中心至端面 center to end (C-E)中心至面 center to face (C-F)中心至中心.中至中 center to center (C-C)坐标 coordinate坐标原点 origin of coordinate出口中心线 center line of discharge入口中心线 center line of suction中心线 centerline (CL)入口 inlet, suction出口 outlet, discharge排出口 exhaust距离 distance另外常用的还有：COP－管道中心标高TOP－管道顶标高TOB－支撑管道的管架顶标高（一般用于同一管架上的一排管道）所有管道标高均与其是否保温，保温厚度等无关，指的均是管道本身。

IMPORTANT INFORMATIONCONTENTS OF CLAPPER SEAL KITThis kit may contain two clapper seals. It is important to determine theappropriate clapper seal for the valve being serviced. THESE SEALSARE NOT INTERCHANGEABLE. For example: If the clapper currentlycontains a seal that looks like “A” below, it MUST be replaced with theexact seal provided in this kit. Refer to the notes below for details.SEAL "A"THIS SEAL CONTAINS A WHITE SEAL WASHER AND A SEAL RING.INSTRUCTIONS START ON PAGE 3.NOTE: THIS IS THE ONLY SEAL THAT CAN BE USED IN THECLAPPER FOR SERIES 756, 758, 764, 768, OR 769 FIRELOCKVALVES.SEAL “B”FOR DOMESTIC SERIES 751 ALARM CHECK VALVES: THIS SEALIS A SOLID DESIGN FOR 4 – 6-INCH/114.3 – 168.3-MM SIZES.INSTRUCTIONS START ON PAGE 5.FOR EUROPEAN SERIES 751 FIRELOCK ALARM CHECK VALVESTATIONS: THIS SEAL IS A SOLID DESIGN FOR 3 - 6-INCH/88.9- 168.3-MM (INCLUDING 165.1 MM) SIZES. INSTRUCTIONS STARTON PAGE 5. NOTE: The solid seal design for Series 751 FireLockEuropean Alarm Check Valve Stations must be ordered specifically forthe European valve. NOTE: European Alarm Check Valves contain aname plate with VdS and CE markings.I-30_1 REPLACING THE CLAPPER SEAL FOR SERIES 751, 756, 758, 764, 768, AND 769FIRELOCK® FIRE PROTECTION VALVESVICTAuLIC IS A REgISTEREd TRAdEmARk oF VICTAuLIC CompAny. © 2006 VICTAuLIC CompAny. ALL RIghTS RESERVEd. pRInTEd In ThE uSA.REV_DREMOVING THE SYSTEM FROM SERVICE AND1.notify the authority having jurisdiction, remote station alarm moni-tors, and those in the affected area that the system is being taken out of service.2. open the water supply main drain valve fully to flush the water supply of any contaminants.3. Close the water supply main drain valve.4. Close the water supply main control valve to take the system out of service.5. open the water supply main drain valve.6. Confirm that water is not flowing from the water supply main drain valve.7. Close the piston-charge-line ball valve (Series 756 and 758) or dia-phragm-charge-line ball valve (Series 764, 768, and 769).8.open the system main drain valve to drain any water that has accumulated and to release system air pressure.NOTE: If the system has operated, open the remote system test valve (inspector's test connection) and any auxiliary drain valves.9.SHUT OFF THE AIR SUPPLY.10. PUSH DOWN ON THE AUTO DRAIN SCREW TO REMOVEPRESSURE IN THE PISTON CHARGE LINE OR DIAPHRAGM CHARGE LINE.11. After all pressure is released from the system, loosen the coverplate bolts slowly. NOTE: do noT remove any cover plate bolts until all cover plate bolts are loosened.12. Remove all cover plate bolts, along with the cover plate and coverplate gasket.13. For Series 764, 768, and 769 valves, push the latch back (towardthe diaphragm).14. Rotate the clapper out of the valve body. At this point, deter-mine which seal is currently installed in the clapper. Refer to the “Contents of Clapper Seal kit” section on page 1 for details.15. Follow the appropriate replacement steps on the following pages.I-30_ REPLACING THE CLAPPER SEAL FOR SERIES 751, 756, 758, 764, 768, AND 769 FIRELOCK ® FIRE PROTECTION VALVESVICTAuLIC IS A REgISTEREd TRAdEmARk oF VICTAuLIC CompAny. © 2006 VICTAuLIC CompAny. ALL RIghTS RESERVEd. pRInTEd In ThE uSA.REV_DREPLACEMENT OF CLAPPER SEAL “A”1.Remove the seal-assembly bolt/bolt seal from the clapper seal.2.Remove the seal-retaining ring.3.pry the edge of the old seal washer from inside the clapper seal,as shown above.4.Remove the seal washer from the clapper seal. This will aid inremoving the clapper seal in step 5. discard the seal washer.5.pry the old clapper seal, along with the seal ring, out of the clap-per. discard the clapper seal/seal ring.6.Wipe away any contaminants, dirt, and mineral deposits from the clapper. Clean out any holes that are plugged in the valve-body seat ring.DO NOT USE SOLVENTS OR ABRASIVES.I-30_3REPLACING THE CLAPPER SEAL FOR SERIES 751, 756, 758, 764, 768, AND 769 FIRELOCK ® FIRE PROTECTION VALVES VICTAuLIC IS A REgISTEREd TRAdEmARk oF VICTAuLIC CompAny. © 2006 VICTAuLIC CompAny. ALL RIghTS RESERVEd. pRInTEd In ThE uSA.REV_D-BSHFS EJBNFUFS PG DMBQQFS TFBM JT JOTUBMMFE JO DMBQQFS4FBMJOH TJEF PG DMBQQFS TFBM GBDFT PVU PG DMBQQFS4NBMMFSEJBNFUFST PG TFBM SJOH BOE DMBQQFS TFBMmake sure the seal ring is installed in the new clapper seal properly, as shown above. The smaller diameter of the seal ring must be installedtoward the sealing surface of the clapper seal.7.Install the new clapper seal into the clapper carefully. make surethe seal ring snaps into the clapper completely.8.place the seal-retaining ring onto the seal washer of the clapperseal.9.Install the seal-assembly bolt/bolt seal through the seal-retaining ring and the clapper. Tighten the seal-assembly bolt/bolt seal to the torque value, listed in the table below, to ensure a proper seal.REqUIRED SEAL-ASSEMBLY BOLT/BOLT SEAL TORqUES FOR10.Follow all steps in the “Installing the Cover plate” section.I-30_4REPLACING THE CLAPPER SEAL FOR SERIES 751, 756, 758, 764, 768, AND 769 FIRELOCK ® FIRE PROTECTION VALVESVICTAuLIC IS A REgISTEREd TRAdEmARk oF VICTAuLIC CompAny. © 2006 VICTAuLIC CompAny. ALL RIghTS RESERVEd. pRInTEd In ThE uSA.REV_DREPLACEMENT OF CLAPPER SEAL “B”1.Remove the seal-assembly bolt/bolt seal from the clapper seal.2.Remove the seal-retaining ring.3.Remove the old solid seal from the clapper. discard the solid seal.4.Wipe away any contaminants, dirt, and mineral deposits from the clapper. Clean out any holes that are plugged in the valve-body seat ring.DO NOT USE SOLVENTS OR ABRASIVES.5.Install the new solid seal into the clapper, as shown above. NOTE:make sure the sealing lip is pointing upward.6.place the seal-retaining ring onto the solid seal, as shown above.I-30_5REPLACING THE CLAPPER SEAL FOR SERIES 751, 756, 758, 764, 768, AND 769 FIRELOCK ® FIRE PROTECTION VALVES VICTAuLIC IS A REgISTEREd TRAdEmARk oF VICTAuLIC CompAny. © 2006 VICTAuLIC CompAny. ALL RIghTS RESERVEd. pRInTEd In ThE uSA.REV_D7. Install the seal-assembly bolt/bolt seal through the seal-retainingring and the clapper. Tighten the seal-assembly bolt/bolt seal to the torque value, listed in the table below, to ensure a proper seal.REqUIRED SEAL-ASSEMBLY BOLT/BOLT SEAL TORqUES FOR8. Follow all steps in the "Installing the Cover plate" section.1.Verify that the cover plate gasket is in good condition. If the gasketis torn or worn, replace it with a new, Victaulic-supplied gasket.2.Align the holes of the cover plate gasket with the holes in the cover plate.3.Insert one cover bolt through the cover plate and cover gasket toease alignment.I-30_6REPLACING THE CLAPPER SEAL FOR SERIES 751, 756, 758, 764, 768, AND 769 FIRELOCK ® FIRE PROTECTION VALVESVICTAuLIC IS A REgISTEREd TRAdEmARk oF VICTAuLIC CompAny. © 2006 VICTAuLIC CompAny. ALL RIghTS RESERVEd. pRInTEd In ThE uSA.REV_D4. Align the cover plate/cover plate gasket to the valve. make sure theclapper spring's arms are rotated to their installed position. Tightenall cover plate bolts into the cover plate/valve body.5. Torque all cover plate bolts in an even, crossing pattern. Refer tothe “Required Cover plate Bolt Torque” table on this page for the required torque values. do noT over-tighten the cover bolts.6. place the system back in service by following the “placing theSystem in Service” section in the appropriate installation, mainte-nance, and testing manual supplied with the valve.I-30_7REPLACING THE CLAPPER SEAL FOR SERIES 751, 756, 758, 764, 768, AND 769FIRELOCK® FIRE PROTECTION VALVESVICTAuLIC IS A REgISTEREd TRAdEmARk oF VICTAuLIC CompAny. © 2006 VICTAuLIC CompAny. ALL RIghTS RESERVEd. pRInTEd In ThE uSA. REV_DI-30REPLACING THE CLAPPER SEAL FOR SERIES 751, 756, 758, 764, 768, AND 769 FIRELOCK ® FIRE PROTECTION VALVESUPDATED 4/ 007I-30 617 REV D ZI00751001VICTAuLIC IS A REgISTEREd TRAdEmARk oF VICTAuLIC CompAny. © 2006 VICTAuLIC CompAny. ALL RIghTS RESERVEd. pRInTEd In ThE uSA.US & WORLD HEADQUARTERS P .O.Box 31Easton,PA 18044-0031USA 4901Kesslersville Road Easton,PA 18040USA1-800-PICK-VIC (1-800-742-5842)1-610-559-33001-610-250-8817(fax)*********************CANADA 905-884-7444905-884-9774(fax)***********************EUROPE32-9-381-15-0032-9-380-44-38(fax)********************UNITED KINGDOM44(0)143874110044(0)1438313883(fax)CENTRAL AND SOUTH AMERICA1-610-559-33001-610-559-3608(fax)*******************ASIA PACIFIC86-21-5425330086-21-54253671(fax)*******************MIDDLE EAST971-4-883-88-70971-4-883-88-60(fax)。

船用pv阀工作原理
船用PV阀是一种压力释放阀，被广泛用于减少或控制船舶的压力水平。

PV阀的工作原理是通过在管道中引入一个可调节的节流点，使得管道中的压力降低到设定的值，并且始终保持在这个值以内。

当管道中的压力超过设定值时，PV阀会自动开启，将多余的压力释放出去，以保持管道中的压力不被过度增加。

PV阀的机制主要由两个部分组成：阀体和阀芯。

阀体是一个金属壳体，其中包含一个弹簧，用于控制阀芯的运动。

阀芯是一个可移动的部件，它与阀体相对运动，以控制管道中的流量。

当管道中的压力超过设定值时，阀芯会自动向外移动，打开阀体，使得多余的压力能够顺利地释放出去。

PV阀的优点是可以保持管道中的压力稳定，并且能够自动地控制压力水平。

此外，PV阀还具有结构简单、使用方便等特点。

因此，它被广泛应用于船舶等需要控制压力的领域。

- 1 -。

SELECTION, INSTALLATION, OPERATION AND TROUBLESHOOTING GUIDEPRESSURE SUSTAININGNORMALLY OPEN (PSNO) VALVESVALVESIRON PSNO VALVEPVC PSNO VALVE2 ▪ PRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVESINTRODUCTION (4)Learn why a PSNO Valve will maximize flush cycleefficiency resulting in reduced maintenance, filter down-time and water use.SELECTION AND ORDERING (6)Includes guidelines for selecting the proper PSNO Valvealong with an ordering example and easy to understandordering charts.HEADLOSS CHARTS (8)Technical information for all sizes of PVC and Iron PSNOValves.COMPONENTS (9)A comprehensive listing of all the components in a PSNOValve along with illustrations, charts and model numbers.INSTALLATION AND MAINTENANCE (12)A review of installation, settings and adjustmentguidelines along with maintenance and winterizing tipsand information.3” AND 4” IRON OR PVC VALVES (13)6” PVC VALVES (15)6” IRON AND LARGER VALVES (17)Exploded drawings with components, descriptions,quantities and ordering information along with basictroubleshooting problems and solutions.PRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVES ▪ 34 ▪ PRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVESThe Netafim USA Pressure Sustaining Normally Open (PSNO) Valve is the universal solution for all types of filters. A PSNO Valve ensures that the filter will initiate a backflush cycle with the required pressure for proper cleaning. This is accomplished by maintaining the correct pressure upstream of the valve (downstream of the filter). After the backflush cycle, the filter element(s) will be thoroughly cleaned.With a PSNO Valve, Filters Flush More Efficiently Resulting in: • Less Maintenance • Less Downtime• Less Water and Energy UsedSince the filters flush less frequently and more efficiently, a PSNO Valve is ideal for all types of filters - media or disc. There is no need for a larger pump, saving capitaland operating expenses, to achieve the correct pressure during backflush.PSNO VALVES MAXIMIZE FLUSH CYCLE EFFICIENCYFOR ALL FILTERSPSNO VALVE FEATURESAccurate Stable Control of Upstream Pressure• Changes in flow do not affect the upstream pressure in the valve since the PSNO Valve pilot regulates this pressure Quick Reaction Time of PSNO Valve• Slightly before the filter starts flushing, the PSNO Valve goes into sustaining modefor quick reaction Manual Override on Solenoid for Easy Adjustments• Solenoid settings can be adjusted by simply turning a knob Hydraulic Valve with Direct Sealing Diaphragm • No stem, shaft or bearing within the water passage • Longer life with less maintenance Easy Installation and Low Maintenance• Netafim valves are the most reliable in the industry, resulting in less maintenance • They are easy to install and operatePSNO VALVE OPERATIONA PSNO Valve is always installed downstream of the filter. During standard operation, filtration mode, the PSNO Valve is fully open and flow or pressure to the field is not restricted. The solenoid is not energized at this time (See Figure 1).During the flushing mode, the solenoid is energized and the PSNO Valve partially closes in order to provide the desired pressure to the filter for proper flushing. This is referred to as the sustaining mode. During the sustaining mode, the valve maintains a “set” upstream pressure regardless of flow rate or pressure variations (See Figure 2).At the end of the flush cycle, the solenoid isde-energized and the PSNO Valve will fully open again.Figure 1: PSNO Valve Filtration Mode - valve is fully open and upstream pressure is 30 psi.Figure 2: PSNO Valve Flushing Mode - valve partiallycloses and upstream pressure raises to 40 psi (or any other adjustable set point).Flow Direction PSNO Iron Valve located downstream of a disc filter.NormallyClosedSolenoid3-WayManualSelector(Iron or PVC)4” PSNO PVC ValveControlTubingFingerFilterPRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVES ▪ 56 ▪ PRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVESSELECTION GUIDELINESWhen selecting a PSNO Valve, the following recommended flow ranges should be considered to ensure proper sizing and performance.It is recommended not to oversize the PSNO Valve. In relation to the specific flow (GPM), an oversized valve will require the diaphragm to be almost closed in the sustaining mode which can create high velocity, unstable regulation and potential cavitation.MAXIMUMORDERING EXAMPLEPipeline: 6”Required Flow Rate: 500 GPMWith a flow rate higher than 400 GPM, but lower than 600 GPM, a 4” valve is recommended. In this example, even though the pipeline is 6”, a 6” valve is not recommended.Choose the required voltage, Item and Model Numbers from the Ordering Information Charts on the next page.PRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVES ▪7PVC MATERIAL with SLIP CONNECTION3” PVC also available with threaded connection.IRON MATERIAL with FLANGED CONNECTIONNote: All PSNO Valves are also available with 12VDC and 12VDCL solenoids. Call Netafim USA Customer Service for item and model numbers. For pricing information, refer to the Agriculture Division Price List.8 ▪ PRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVESH E A D L O S S (p s i )FLOW (GPM)13247658925020035045055070012509001,75010HEADLOSS CHART - PVC VALVESH E A D L O S S (p s i )FLOW (GPM)1324765893005002007009001,5002,5004,0005,0007,00010HEADLOSS CHART - IRON VALVESPRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVE COMPONENTSA Pressure Sustaining Normally Open (PSNO) Valve ships pre-assembled by Netafim USA following strict quality standards. The PSNO Valve consists of a Basic Valve, a Normally Closed Solenoid, a Pressure Sustaining Pilot, andan Accelerator Relay (if the valve is 6” and larger).1. Basic Valve 3. PressureSustaining Pilot2. NormallyClosed Solenoid4. AcceleratorRelayPSNO Valve+++=1. BASIC VALVEThe basic valve consists of four simple parts - body, spring,diaphragm and bonnet - making it the simplest valve to operateand maintain. Installation is quick and easy with its unique inlinedesign which also creates low losses at high flow rates.• Available with two body material options - PVC or Iron• Stainless steel internal spring provides strength and long-life• Flexible reinforced direct sealing rubber diaphragm requires nobearings, guides or internal seals• Cover and body constructed of UV and corrosion resistantmaterialsBasic Valve - PVCBasic Valve - IronPRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVES ▪ 910 ▪ PRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVES1. BASIC VALVE, (con’t.)a. DiaphragmPVC and Iron valves are standard with a direct sealing natural rubber diaphragm. All Iron PSNO Valves use a high pressure diaphragm with a standard range of 10 - 230 psi. All PVC PSNO Valves use a low pressure diaphragm with a range of 2 - 60 psi.b. Hydraulic Control Tubing and FittingsHydraulic control tubing is used for various connections on the valve and the tubing size is different based on the valve size and material. Fittings are available in either Plastic or Prestolock Brass based on the valve size and material.*12mm tubing connects the Accelerator Relay of the PSNO Valve to the command filteron the Galaxy Automatic Disc-Kleen Filter.High Pressure DiaphragmHydraulic Control TubingPlastic FittingsPrestolock Brass Fittings2. SOLENOIDA solenoid valve receives an electric command from a controller and converts it into a hydraulic command to the main valve. This enables the opening and closing of the valve by allowing the passage of water into or fromthe control chamber of the main valve.Always use a Normally Closed (NC) Solenoid on all PSNO Valves. Standard solenoid is 24VAC NC. Choose from the following solenoids based on the available power source.All solenoids have a manual override feature. Turning the knob 90 degrees to the left or right will activate the solenoid and place the valve in Sustaining Mode. Latching solenoids have a three position lever for manualoverride. Turning the lever to the right or “O” position activates the solenoid and places the valve in Sustaining Mode. Left or “C” position turns the valve off. For automatic mode, the lever should be placed in the center(locked) position.SOLENOID ORDERING 24VAC Solenoid 12VDC Solenoid 12VDCL SolenoidPRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVES ▪ 113. PILOTA pilot is a mini-valve which ensures accuracy of the regulated pressure for hydraulic control valves. In PSNO valves, when the line pressure is lower than the pilot’s spring setting (the set point), the pilot permits the passage of water into the chamber of the main valve, partially closing the valve. PSNO Valves are standard with a Green Pilot Spring and a recommended set point of 45 psi.Pilot setting recommendations:• Automatic Disc-Kleen Filters Set the pilot to 40 - 45 psi • Sand Media Filters ................Set the pilot to 30 - 35 psi • Automatic Screen Filters .....Set the pilot to 30 - 35 psiPlastic PilotBronze Pilot4. ACCELERATOR RELAYAn Accelerator Relay is designed with large flow passages to allow faster reaction time of the main PSNO valve. As soon as the solenoid is energized, the relay allows larger amounts of water to flow into the main valve chamber, partially closing the valve. It is a standard component on all 6” and larger valves.ACCELERATOR RELAY Accelerator Relay12 ▪ PRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVESSETTINGS AND ADJUSTMENT GUIDELINESThe 3-Way selector must be in the A-position. The O-port is used to manually open the valve and the C-port to manually close the valve. A neutral position, not facing any of the ports, locks the water in the bonnet (used in case the pilot malfunctions).INSTALLATION GUIDELINES1. Install the valve downstream of the filter station.2. The arrow on the bonnet should match the flow direction.3. Verify that a finger filter was installed at the upstream pressure port of the valve.4. The valve can be installed in any position. When installing a 6” PVC Valve or a 12” Iron Valve, install the bonnets side by side, not one up and one down. This will allow for easier maintenance.5. For all threaded valves – use five layers of Teflon tape for proper installation.6. For all PVC slip valves – use primer and a heavy duty solvent.7. For all flanged valves – bolts should be tightened in a diagonal sequence.8. For 6” and larger iron valves, the needle valve connects to the 2” command filter on the Galaxy or main filterwith the supplied 12mm tubing. The tee fitting on the command filter will have an open end for attachment to the 12mm tubing from the needle valve.9. Connect the solenoid with the supplied 8mm tubing to the closest solenoid on the filter station by replacing theelbow fitting on the solenoid with a “T” connector.10. Wire the solenoid of the valve to the “M” (master valve) connector on the backflush controller.• For 6” Iron flanged valves and larger:- Open ball valves at the upstream and downstream ports of the valves - Close needle valve and then open it 3 full turns • Start the pump.• Make sure the lines are full and the designed pressure is reached.• Open the main valve manually and perform a backflush cycle with the controller.• The valve remains closed or opens slightly while the upstream pressure maintains a high level.• Loosen the bolt on the pilot until the upstream pressure reaches the minimum required level to backflush the filter.• Wait until the pressure stabilizes, make final adjustments and tighten the lock nut on the pilot.• If the manual override screw on the solenoid was used to manually open the valve in the previous step, turn it to the original position (automatic arrow facing base of the solenoid).• Initiate another backflush cycle from the backflush controller and make sure the valve reaches the set pressure before backflush. Measure the pressure with a pressure gauge. Adjust pre-dwell time in the controller if set pressure is not achieved before backflush.• If pressure is lower than the required set point, tighten the bolt on the pilot; every turn is approximately equivalent to 10 psi. Open the bolt if pressure is higher than set point.MAINTENANCE1. Keep the valve clear from weeds and dirt.2. Turn the handle of the 3-way selector periodically to prevent sticking.3. Verify the upstream pressure periodically, using a quality liquid filled gauge.WINTERIZINGDrain the valve by disconnecting the tubing from the access ports of the valve and at any location where water can be trapped.3” and 4” IRON/PVC VALVE COMPONENTSPRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVES ▪ 1314 ▪ PRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVESPRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVES ▪ 156” PVC VALVE COMPONENTSNotes:• 8mm tubing from the solenoid and 12mm tubing from the accelerator relay, attach to the 2” command filter of the main filter.• Solenoid ports may be labeled either P and A or 2 and 1.16 ▪ PRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVESPRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVES ▪ 176” IRON AND LARGER VALVE COMPONENTSNotes:• Solenoid ports may be labeled either P and A or 2 and 1.• 8mm tubing from the solenoid attaches upstream of the valve.• of the main filter.18 ▪ PRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVESPRESSURE SUSTAINING NORMALLY OPEN (PSNO) VALVES ▪ 19NETAFIM USA5470 E. Home Ave.Fresno, CA 93727CS 888 638 2346F 800 695 4753A080 03/12。

Series 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-041/18Vacuum gate valvewith pneumatic actuatorThis manual is valid for the valve ordering number(s):12144- . A14/24/34/44 12146- . A14/24/34/44 12148- . A14/24/34/44The fabrication number is indicated on each product as per the label below (or similar):Explanation of symbols:Read declaration carefully before you start any other action!Keep body parts and objects away from the valve opening!Attention!Hot surfaces; do not touch!Product is in conformity with EC guidelines, if applicable!Loaded springs and/or air cushions are potential hazards!Disconnect electrical power and compressed air lines. Do not touch parts under voltage!Wear gloves!Series 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-042/18Imprint:VAT Vakuumventile AG, CH-9469 Haag, Switzerland ManufacturerWebsite Phone+41 81 771 61 61Fax+41 81 771 48 30EmailCH@Publisher VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandEditor VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandPrint VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandCopyright © VAT Vakuumventile AG 2008No part of these Instructions may be reproduced in any way (photocopies, microfilms or anyother reproduction processes) nor may it be manipulated with electronic systems, duplicated ordistributed without written permission from VAT. Offenders are liable to pay damages.The original VAT firmware and updated state of the art versions of the VAT firmware areintended for use with VAT products. The VAT firmware contains a limited, time unlimited userlicense. The VAT firmware may not be used for purposes other than those intended nor is itpermitted to make copies of the VAT firmware. In particular, it is strictly forbidden to givecopies of the VAT firmware to other people.The use of trade names, brand names, trademarks, etc. in these Instructions does not entitlethird parties to consider these names to be unprotected and to use them freely. This is inaccordance with the meaning of the laws and acts covering brand names and trademarks.Series 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-043/18Contents:1Use of product (4)1.1Technical data (4)2Installation (4)2.1Unpacking (4)2.2Installation into the system (5)2.2.1Tightening torque for flange screws (5)2.2.2Admissible forces (5)2.3Connections (6)2.3.1Compressed air connection (6)2.3.2Electrical connection (7)3Operation (8)3.1Normal operation (8)3.2Operation under increased temperature (8)3.3Behavior in case of compressed air pressure drop (8)3.4Behavior in case of power failure (8)3.5Emergency operation at power failure (8)4Trouble shooting (9)5Maintenance & repairs (9)5.1Cleaning or replacement of gate seal and/or bonnet seal (10)5.2Cleaning or replacement of locking balls (12)5.3Cleaning or replacing of shaft feedthrough seals (13)6Drawing (16)7Spare parts (17)8Warranty (18)Series 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-044/181 Use of productUse product for clean and dry indoor vacuum applications under the conditions indicated in chapter «Technical data» only! Other applications are only allowed with the written permission of VAT.1.1 Technical dataPressure range DN 160 – 200 : 1 x 10-7 mbar to 1.6 bar (abs)DN 250 : 1 x 10-7 mbar to 1.2 bar (abs)Differential pressure on the gate DN 160 – 200 :≤ 1.6 bar in either directionDN 250 : ≤ 1.2 bar in either directionDifferential pressure at opening ≤ 30 mbarAdmissible temperature: Valve body ≤ 120°CActuator≤ 80°CPositionindicator≤ 80°CSolenoid≤ 50°CPosition indicator: Contact rating 5 A / 250 V AC, 3 A / 50 V DCSolenoid see tag on solenoidFurther data according to VAT catalogue «Vacuum Valves 2004».2 Installation2.1 UnpackingBefore unpacking the valve, make sure that the packaging is in impeccable condition and the valve has not suffered damage.Note!The plastic packing material and/or protective covers may only be removed immediately before the valve is mounted into the system. Unprotected sealing surfaces must be treated with care and kept clean.Series 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-045/182.2 Installation into the systemThe valve seat side is indicated by the symbol "∇" on the connection flange.2.2.1 Tightening torque for flange screwsThe screws of the flanges have to be tightened uniformly in crosswise order. The tightening torques indicated in the following table have to be observed.DN Tightening torque «Nm» lbf . ftmm inch ISO JIS ASA-LP ISO JIS ASA-LP 160 6 8 - 10 10 - 12 10 - 12 6 - 7.5 7.5 - 9 7.5 - 9 200 8 8 - 10 16 - 18 40 - 60 6 - 7.5 12 - 13 30 - 44 250108 - 1016 - 18-6 - 7.512 - 13-Higher tightening torques may deform the valve body. This can lead to improper function of the valve or to a leaky valve gate.2.2.2 Admissible forcesForces from evacuating the system and from the weight of other components can lead to deformation of the valve body and to malfunction of the valve. The stress has to be relieved by suitable means, e.g. bellows sections. The following forces are admissible:DN (nom. I.D.) Axial tensile or compressive force «FA» Bending moment «M» Maximum admissibletorsional moment of body«TM» mm inch Nlbf Nm lbf. ft Nmlbf . ft160 6 3000 674 150 110 10’000 7’370 200 8 3000 674 150 110 12’000 8’850 250 10 3500 787 200 148 12’000 8’850If a combination of forces («FA», «M» and «TM» ) occurs, the values mentioned above are invalid.Please contact VAT for more information.Series 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-046/182.3 Connections2.3.1 Compressed air connectionConnect compressed air only if- valve has been installed into the vacuum system- moving parts cannot be touchedWith solenoid: Connect compressed air to connection IN (internal thread R 1/8“, 1/8“ NPT for USA) Without solenoid: Connect compressed air to connection OPEN and CLOSE (internal thread M5) Solenoid delivered separately(not attached to valve):Compressed air connection atpneumatic cylinder: internal thread M5Compressed air connected to <A>:valve opensCompressed air connected to <B>:valve closesCompressed air pressure (min. - max. overpressure): 4 - 7 bar / 55 - 100 psigUse only clean, dry or slightly oiled air!Series 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-047/182.3.2 Electrical connectionDo not touch any electrically charged parts!Connect electrical power only if- valve has been installed into the vacuum system- moving parts cannot be touchedVerify that mains voltage matches voltage stated on the solenoid! Sockets for position indicator and solenoid are supplied with the valve.Wire solenoid and position indicator according to the following diagrams:Series 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-048/183 Operation3.1 Normal operationValve is opened and closed by means of compressed air.3.2 Operation under increased temperatureSee «1.1 Technical data»The maximum temperatures indicated in the technical data are only valid as long as the valve is in one of the end positions. Cycling the valve at these temperatures may reduce the cycle life of the mechanism.3.3 Behavior in case of compressed air pressure dropValve closed: valve remains closedValve open: valve position is undefined3.4 Behavior in case of power failureStandard solenoid: valve closesSolenoid for impulse actuation (option): valve position does not change, but a started movement will be completed 3.5 Emergency operation at power failureIn case of a power failure, the valve can be actuated manually if compressed air is available.Series 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-049/184 Trouble shootingFailure Check Action Valve does not close/open Power available? Connect correct voltageCompressed air available? Connect correct air pressure Solenoid defective? Replace solenoidLeak at gate Valve seat and gate seal clean?Clean valve seat and gate seal, or replace gate sealCompressed air available? Connect correct air pressure Leak at bodyFlanges leaktight? Tighten flange screws correctly Screws at upper part of body tightened? Tighten bonnet screws correctlyReplace bonnet sealIf you need any further information, please contact one of our service centers. You can find the addresses on our website: http://www.vat.ch5 Maintenance & repairsUnder clean operating conditions, the valve does not require any maintenance during the specified cycle life. Contamination from the process may influence the function and requires more frequent maintenance.Before carrying out any maintenance or repairs, please contact VAT. It has to be individually decided whether the maintenance/repair can be performed by the customer or has to be carried out by VAT. The fabrication number on the valve has always to be specified.All supplies (e. g. compressed air, electrical power) must be disconnected for removal/installation of the valve from/into the system and for maintenance work. Even with disconnected supply, loaded springs and/or air cushions in cylinders can be potential hazards.Keep fingers and objects away from the valve opening!Products returned to VAT must be free of harmful substances such as e.g. toxical, caustic or microbiological ones. If products are radioactively contaminated, fill in the VAT form «Contamination and Radiation Report» and send it with the product. The form is available at VAT. The maximum values indicated in the form must not be exceeded.Series 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-0410/185.1 Cleaning or replacement of gate seal and/or bonnet sealThe figures in brackets refer to the drawing on page 16The lower part of the body (flange part) need not be removed from the system for cleaning/replacing the gate seal and/or bonnet seal!a) Separation of upper part of body (11) / actuator assembly from lower part of body (10):1. Vent vacuum chambers on either side of valve2. Open valve by means of compressed air3. Switch off compressed air and power supply4. Disconnect compressed air and power lines from valve5. Loosen and swing out both screws (12)Attention:Make sure to maintain upper part of body (11) / actuator assembly in its positionwhile swinging out the screws!6. Withdraw upper part of body (11) / actuator assembly carefully from lower part of body (10) and put it on a cleanplace (seat side symbol «∇» on top)b) Cleaning or replacement of gate seal and bonnet seal:7. Apply compressed air (air pressure approx. 1 bar) and move mechanismslowly out of upper part of body (11)Attention:Provide sufficient free space in order to preventthe mechanism from touching any objects!← free space8. Disconnect compressed air from valve9. Clean (A) or replace (B) gate seal (1):(A) 1. Leave gate seal in groove and clean it by using a lint-free clothand alcohol2. Slightly lubricate seal with VAT vacuum grease[see «Spare parts»](B) 1. Pull gate seal out of groove by means of a scribing toolAttention: Be careful not to damage the bottom of the groove!2. Clean seal groove by using a lint-free cloth and alcohol3. Put new gate seal on seal groove and press it into groove uniformlyand crosswiseremoval of gate seal installation of gate sealSeries 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-0411/1810. Clean (A) or replace (B) bonnet seal (2):(A) 1. Leave bonnet seal in groove and clean it by using a lint-free cloth and alcohol2. Slightly lubricate seal with VAT vacuum grease [see «Spare parts»] (B) 1. Pull bonnet seal out of groove by means of a scribing toolAttention: Be careful not to damage the bottom of the groove! 2. Clean seal groove by using a lint-free cloth and alcohol3. Put new bonnet seal on seal groove and press it into groove on one short side4. Distribute seal uniformly over long sides to opposite short side and press it fully into groove11. Clean sealing surface of upper part of body (11) by using a lint-free cloth and alcohol12. Clean sealing surface of valve seat on lower part of body (10) by using a lint-free cloth and alcohol c)Mounting of upper part of body (11) / actuator assembly on lower part of body (10):13. Make sure to have gate (16) on seat side «∇»:Symbol «∇» on upper part of body (11)Note: Mechanism with actuator shaft (13) is stifflyrotatable by 360°!gate (16) (without bore holes) gate seal (1) seat side symbol 14. Align mechanism with opening of upper part of body (11)correctwrong15. Apply compressed air (air pressure approx. 1 bar) and move mechanism slowly into upper part of body (11)Attention:Make sure to keep the space between body opening and mechanism free of any objects or body parts!16. Disconnect compressed air from valve17. Set upper part of body (11) / actuator assembly carefully on lower part of body (10)Attention: The tips of the triangles «∇» of both body parts must face each other!∇ on both body parts18. Swing back both screws (12) and tighten them alternatelyTightening torque: DN 160 - 200: 14 Nm / 10.5 lbf . ft DN 250: 20 Nm / 15.0 lbf . ft 19. Connect electrical power and compressed air 20. Perform function and leak testSeries 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-0412/185.2 Cleaning or replacement of locking ballsThe figures in brackets refer to the drawing on page 16The lower part of the body (flange part) need not be removed from the system for cleaning/replacing the locking balls! When the locking balls are cleaned/replaced, we recommend to clean the gate seal and bonnet seal as well(see relevant chapter).a) Separation of upper part of body (11) / actuator assembly from lower part of body (10):1. Carry out steps 1 - 6 of chapter «Cleaning or replacement of gate seal and/or bonnet seal»,however with seat side «∇» down!b) Cleaning or replacement of locking balls:2. Apply compressed air (air pressure approx. 1 bar) and move mechanismslowly out of upper part of body (11)Attention:Provide sufficient free space in order to prevent themechanism from touching any objects!← free space3. Disconnect compressed air from valve4. Remove lock nut (14) with disk (15)5. Withdraw mechanism from actuator shaft (13) and put it on a clean place6. Remove screws (19)7. Lift off counter plate (17) carefully and put it on a clean place8. Remove all visible balls (3) from ball guidance (18)9. Lift off ball guidance (18) carefully and put it on a clean placeAttention: Balls can get caught in the lower ball sockets of the ball guidance (18)!10. Remove all balls (3) from ball tracks in gate (16)11. C lean (A) or replace (B) balls (3):(A) 1. Clean ball tracks in gate (16) and counter plate (17) by using a lint-free cloth,and check their condition with regard to wear2. Clean balls and ball sockets in ball guidance (18) by using a lint-free cloth and alcohol3. Lubricate balls with VAT vacuum grease [see «Spare parts»]4. Insert balls into ball tracks in gate (16)(B) 1. Clean ball tracks in gate (16) and counter plate (17) by using a lint-free cloth and alcohol ,and check their condition with regard to wear2. Clean ball sockets in ball guidance (18) by using a lint-free cloth and alcohol3. Insert new, lubricated balls [see «Spare parts»] into ball tracks in gate (16)(A + B) 1. Put ball guidance (18) carefully on gate (16) so that balls (3) get into ball socketsAttention: Regard correct position!2. Insert remaining balls into ball sockets in ball guidance (18)Series 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-0413/1812. Put counter plate (17) on ball guidance13. Insert and tighten screws (19)Attention:The internal screws first, then the outside screws. Tightening torque: 9 Nm!14. Move mechanism on actuator shaft (13) to its stopAttention:Spanner width of ball guidance (18) and shaft (13) must match!Mechanism must not rotate against the shaft!15. Mount lock nut (14) with disk (15)16. Clean sealing surface of upper part of body (11) by using a lint-free cloth and alcohol17. Clean sealing surface of valve seat on lower part of body (10) by using a lint-free cloth and alcoholc) Mounting of upper part of body (11) / actuator assembly on lower part of body (10):18. Carry out steps 13 - 20 of chapter «Cleaning or replacement of gate seal and/or bonnet seal»Valve is ready for operation5.3 Cleaning or replacing of shaft feedthrough sealsThe figures in brackets refer to the drawing on page 16The lower part of the body (flange part) need not be removed from the system for cleaning/replacing the shaft feedthrough seals! When the shaft feedthrough seals are cleaned/replaced, we recommend to clean the gate seal and bonnet seal as well (see relevant chapter).a) Separation of upper part of body (11) / actuator assembly from lower part of body (10):1. Carry out steps 1 - 6 of chapter «Cleaning or replacement of gate seal and/or bonnet seal»,however with seat side «∇» down!b) Cleaning or replacement of shaft feedthrough seals:2. Apply compressed air (air pressure approx. 1 bar) and move mechanismslowly out of upper part of body (11)Attention:Provide sufficient free space in order to prevent themechanism from touching any objects!← free space3. Disconnect compressed air from valve4. Remove lock nut (14) with disk (15)5. Withdraw mechanism from actuator shaft (13) and put it on a clean place6. Apply compressed air (air pressure approx. 1 bar) and move actuator shaft (13) slowly into upper part of body (11)7. Disconnect compressed air from valve8. Put upper part of body (11) / actuator assembly in upright position (actuator on top)9. Take a note in which position the actuator is mounted with regard to the seat side [see symbol «∇» on upper part ofbody (11)], so that the actuator can be mounted in the same position after completion of the maintenance workSeries 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-0414/1810. Remove 4 screws (20)11. Withdraw actuator from upper part of body (11) and put it on a clean place 12. Remove both seals (21) and spacer (22) carefully from upper part of body (11)Attention: Be careful not to damage the sealing surface!13. Clean feedthrough opening in upper part of body (11) and spacer (22) by using a lint-free cloth and alcohol 14. Clean (A) or replace (B) seals of shaft feedthrough (21); see drawing below(A)1. Clean seals by using a lint-free cloth and alcohol2. Lubricate first seal extensively with VAT vacuum grease [see «Spare parts»] and insert it in feedthroughopening in upper part of body (11) 3. Insert spacer (22)4. Lubricate second seal extensively with VAT vacuum grease [see «Spare parts»] and insert it infeedthrough opening in upper part of body (11)(B)1. Lubricate first seal extensively with VAT vacuum grease [see «Spare parts»] and insert it in feedthroughopening in upper part of body (11) 2. Insert spacer (22)3. Lubricate second seal extensively with VAT vacuum grease [see «Spare parts»] and insert it infeedthrough opening in upper part of body (11)(A + B) 1.Lubricate space between both seals extensively with VAT vacuum grease [see «Spare parts»]1121222111 upper part of body21 first and second shaft feedthrough seal22 spacer =space between both seals → area to be lubricated15. Clean actuator shaft (13):1. Apply compressed air and move out actuator shaft slowly in its full length(air pressure approx. 1 bar) 2. Clean actuator shaft by using a lint-free cloth and alcohol3. Lubricate running surface of actuator shaft slightly with VAT vacuum grease [see «Spare parts»]4. Move back actuator shaft slowly with compressed air (air pressure approx. 1 bar)5. Remove excessive grease from shaft6. Disconnect compressed air from actuator16. Put actuator on upper part of body (11)Attention: Actuator must be mounted in the same position as it was before disassembly! 17. Mount and tighten 4 screws (20)Tightening torque: DN 160: 6 Nm / 4.5 lbf . ft DN 200 - 250: 14 Nm / 10.5 lbf . ftSeries 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-0415/1818. Apply compressed air (air pressure approx. 1 bar) and move actuator shaft slowly out of upper part of body (11) 19. Disconnect compressed air from actuator 20. Remove excessive grease from shaft21.Lubricate end piece of shaft without thread slightly with VAT vacuum grease [see «Spare parts»]area to be lubricated22. Move mechanism on actuator shaft (13) to its stopAttention: Spanner width of ball guidance (18) and shaft (13) must match! Mechanism must not rotate against the shaft! 23. Mount lock nut (14) with disk (15)24. Clean sealing surface of upper part of body (11) by using a lint-free cloth and alcohol25. Clean sealing surface of valve seat on lower part of body (10) by using a lint-free cloth and alcohol c)Mounting of upper part of body (11) / actuator assembly on lower part of body (10):26. Carry out steps 13 - 20 of chapter «Cleaning or replacement of gate seal and/or bonnet seal»Valve is ready for operationSeries 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-0416/186 DrawingItem Designation Item Designation Item Designation1 gate seal 13 actuator shaft 19 countersunk-head screws2 bonnet seal 14 lock nut 20 cylinder head screws3 lockingballs 15 disk 21 feedthroughseals10 lower part of body 16 gate 22 spacer11 upper part of body 17 counter plate12 swing screws 18 ball guidanceSeries 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-0417/187 Spare partsPlease specify the fabrication number of the valve (see yellow label on valve) when ordering spare parts. This isto ensure that the appropriate spare parts are supplied.The item numbers refer to the drawing belowItemDesignation Ordering No. DN 160 200 250Seal kit 1) 216860 216859 2168571 Gate seal N-5100-258 N-5100-266 N-5100-3782 Bonnet seal N-5100-255 N-5100-264 N-5100-3763 Spare parts kit «balls lubricated» 216865 216864 216862 4 Position indicator 78855-R1 78855-R1 78855-R15 Standard solenoid with coil 2) 94800-R1 94800-R1 94800-R16 Solenoid for impulse actuation with coils 2) 94801-R1 94801-R1 94801-R1VAT vacuum grease (10g) N-6951-011 N-6951-011 N-6951-0111)Seal kit includes:gate seal, bonnet seal, shaft feedthrough sealsIn most cases it is sufficient to replace the gate seal and bonnet seal only. 2)Specify voltage!VAT Vakuumventile AG would be pleased to carry out the maintenance work for you. Please contact the VAT representative responsible for your country. You will find the addresses on our website .Please specify the fabrication number of the valve whenever you place an order for spare parts. Thefabrication number is indicated on a yellow label attached to the actuator of the valve (see product identification label on page 1).Attention: Use lubricatedspare parts only!Series 121, DN 160 - 250 (I.D. 6" - 10")VAT Vakuumventile AG, CH-9469 Haag, SwitzerlandTel +41 81 771 61 61 Fax +41 81 771 48 30 CH@ 218567EF2010-10-0418/188 WarrantyEach product sold by VAT Vakuumventile AG (VAT) is warranted to be free from the manufacturing defects that adversely affect the normal functioning thereof during the warranty period stated in VAT's «Terms of Sale» immediately following delivery thereof by VAT, provided that the same is properly operated under conditions of normal use and that regular, periodic maintenance and service is performed or replacements made, in accordance with the instructions provided by VAT. The foregoing warranty shall not apply to any product or component that has been repaired or altered by anyone other than an authorized VAT representative or that has been subject to improper installation or abuse, misuse, negligence or accident. VAT shall not be liable for any damage, loss, or expense, whether consequential, special, incidental, direct or otherwise, caused by, arising out of or connected with the manufacture, delivery (including any delay in or failure to deliver), packaging, storage or use of any product sold or delivered by VAT shall fail to conform to the foregoing warranty or to the description thereof contained herein, the purchaser thereof, as its exclusive remedy, shall upon prompt notice to VAT of any such defect or failure and upon the return of the product, part or component in question to VAT at its factory, with transportation charges prepaid, and upon VAT's inspection confirming the existence of any defect inconsistent with said warranty or any such failure, be entitled to have such defect or failure cured at VAT's factory and at no charge therefor, by replacement or repair of said product, as VAT may elect. VAT MAKES NO WARRANTY OR REPRESENTATION OF ANY KIND, EXPRESS OR IMPLIED, (INCLUDING NO WARRANTY OR MERCHANTABILITY), EXCEPT FOR THE FOREGOING WARRANTY AND THE WARRANTY THAT EACH PRODUCT SHALL CONFORM TO THE DESCRIPTION THEREOF CONTAINED HEREIN, and no warranty shall be implied by law.Furthermore, the «Terms of sale» at the back of the price list are applicable.。

Materialsand ListingsOPW 301Emergency VentsThe OPW 301 Emergency Vent isLid: Cast iron with AST Phase 1 Enhanced Vapor Recovery (EVR) SystemTable 1Emergency Venting Size Selection GuideFor Horizontal Above Ground Storage TanksThe OPW AST Venting Guide is supplied to assist emergency venting selection for above ground storage tanks (AST). The table below contains common tank sizes and based on the Wetted Area of a horizontal cylindrical storage tank, the correct size OPW Emergency Vent . The following chart, was taken directly from NPFA 30 and UL 142.Horizontal AST Emergency Venting Size Guide – Table 1Capacity Diameter LengthWetted Area Required Vent Capacity OPW 301 Vent SizeGallons Liters ft. or in.Meters ft. or in.Meters sq. ft.sq. m.CFH CMHHorizontal AST Emergency Vent SelectionFor Horizontal Above Ground Storage TanksTABLE 1 is a pre-calculated chart that may have all the information needed to choose the proper emergency vent. If the tank size is not in the pre-calculated chart, use the example below as a guide to figure out the wetted area, cubic feet per hour (CFH), and proper vent selection for the particular tank.**EXAMPLE:Given: Tank capacity is 10,000 gallons; 10 feet in diameter x 17 feet long.Step 1From TABLE 1: WA = 518 sq. ft.If not in the table, do the following to calculate the wetted area:p d24p d 22Formula: WA=.75 2 + pdl =.75 + pdlWA = wetted area in square feet75% = horizontal tank factor p = 3.14d = diameter of tank end in feet l = length of tank in feet3.14 x1022WA=.75 + (3.14 x 10 x 17)WA=.75 (157.0 + 533.8) = 518 square feet rounded Step 2If the tank size is in the chart, use the supplied CFH values to determine theemergency vent size needed in TABLE 1.If not in the charts, continue the following example:Using 518 square feet, the cubic feet per hour (CFH) can be found using TABLE 1.Since 518 falls between the values of 500 and 600, interpolation is necessary as follows:See TABLE 2 for additional CFH values.600 sq. ft. 392,000 CFH -500 sq. ft. -354,000 CFH Difference: 100 sq. ft.38,000 CFH38,000 x100518-500; x =6,840 CFHTotal CFH required = 354,000 CFH + 6,840 CFH = 360,840 CFH Step 3Vent selection: using TABLE 1, find the range in which 360,840 CFH falls. The tables show that an 8" emergency vent is needed. **PEI Recommended Practices 200-96Wetted Area vesus Cubic Feet of Free Air Per Hour Table 2(14.7 PSIA and 60°)SOURCE: Flamable and Combustible Liquids Code 30, NFPA.Interpolate for immediate values.。

斯派莎克先导薄膜式蒸汽减压阀工作原理斯派莎克先导薄膜式蒸汽减压阀工作原理先导薄膜式蒸汽减压阀作为一种利用蒸汽自身能量来调控管系压力的自力式阀门,其性能好坏是打算整个蒸汽系统能否平安、稳定运行的关键。

由于其结构简单、工况恶劣多变且调整精度要求高,一般的静态理论计算、传统样机试验、阅历优化设计等方法根本无法满意用户对减压阀工作稳定、响应快速的运行要求。

同时随着工业生产呈现大容量、高参数、低耗的趋势进展,蒸汽减压阀内流淌诱导振动、噪声问题凸显,严峻干扰设备的稳定运行,且对操作人员的身心健康构成较大威逼。

先导式减压阀主要由先导阀和主阀组成。

先导阀作为压力调整，主阀是导阀的执行者。

二者亲密协作，完成减压过程。

任何一方消失问题，都会导致减压过程失败。

先导阀主要由导阀体，导阀芯，导阀座，导阀弹簧，调整弹簧，调整螺钉，膜片等零件组成。

先导阀的膜片可以感知阀后压力，依据阀后压力变化转变导阀芯的开启高度，掌握进口介质流到活塞上方的流量。

调整弹簧用来设定调整压力范围，转动调整螺钉可以转变出口压力。

斯派莎克先导薄膜式蒸汽减压阀工作原理主阀由阀体，活塞，活塞环，缸套，主阀芯，主阀座，主阀弹簧，底盖等零件组成。

导阀流出的介质到达活塞上方，在介质压力作用下推动活塞向下运动，带动主阀芯打开。

先导薄膜式蒸汽减压阀动态特性讨论针对以上问题,公司合作研发的先导薄膜式蒸汽减压阀系列产品中DN50、PN25规格为主体讨论对象,开展以下一系列讨论：采纳流场数值模拟方法对蒸汽减压阀不同节流阀口缩流系数和堵塞流临界压力比进行分析计算以作为数学建模依据；建立了先导薄膜式蒸汽减压阀从气源到负载完整的动态模型,其中考虑了实际工况下真实气体效应及蒸汽节流减压中的焦耳汤姆逊效应,为随后建立。

斯派莎克先导薄膜式蒸汽减压阀工作原理顺时针转动调整螺钉，压缩调整弹簧，弹簧弹性变形后，推动膜片先下动作，同时导阀芯向下动作，导阀芯开启，（介质通过主阀体内导流孔，到达导阀芯位置等候多时了）。