Check valves Technical Data Sheet2CS - SeriesPage 3WI - SeriesPage 3CO - SeriesPages 4 and 5FI - SeriesPages 6 and 7FO - SeriesPages 6 and 7FW - SeriesPages 6 and 7IN - SeriesPages 8 and 9IO - SeriesPages 10 and 11WM - SeriesPages 12 and 13IW - SeriesPage 14TO - SeriesPage 14AuxiliaryMountingToolsPage 15 Summary3Tfit!Other diameters on request.Mounting dimensionsProduct dimensionsO-ringflow (m /h)100908070605040302010d e l t a P (k P a )flow (m /h)100908070605040302010d e l t a P (k P a )4Ø CØ DØ EØ GAll dimensions are given in mm.The Watts check valves type CO with unique sealing principle offers outstanding performances.These check valves are used in plumbing fittings, sanitary taps and in threaded non-return valves where building codes and international standards are required.Other diameters on request.Approvals: K iwa (NL), Belgaqua (B), DVGW (D), NF - ACS (F),WRAS (UK), ETA - GDV (DK), SITAC (S), NSF (US).5100908070605040302010d e l t a P (k P a )Pressure loss-curveClassical guiding of valve stem Guiding of valve stem (WATTS)Some vibrations can occur at low flow rates (water flush atThanks to the unique guide system by slotted stem that eliminates the possibility of movement and optimal hydraulic profile, vibrations are eliminated.By providing this guidance without the possibility of move-ment avoids calcareous deposits and vibration, ensuring a flawless and quiet operation for years.6FI015 DN15FI - FO - FWThe Watts check valve type FI, FO and FW is a perfect slide-in cartridge with added advantages.The best performance in those inlet sides where tightening has to be simple. It is marked by its unique construction and its uni-versal applications.Approvals: K iwa (NL), Belgaqua (B),DVGW (D), NF - ACS (F), NSF (US).FI010 DN8FO015 DN15FO020 DN20FW010 DN10Approval: GDV (DK)7FI010 DN8FI015 DN150.40.81.21.62.02.42.83.23.64.04.85.66.47.28flow (m 3/h)100908070605040302010d e l t a P (k P a )Pressure loss-curveAll dimensions are given in mm.The Watts snap-in valve type IN is a compact and therefore easy to install check valve.The advantage for OEM applications is, that in case of a side- connection in the housing, the O-ring can be mounted first and secondly the check valve itself.This way the O-ring will not be damaged by the sharp edges of the side- connection.This check valve will meet all quality requirements.Its advantages are yours.Approvals: K iwa (NL), Belgaqua (B), DVGW (D), NF - ACS (F),WRAS (UK), ETA - GDV (DK), SITAC (S), NSF (US), AWQC (AUS).All dimensions are given in mm.92468101214161820flow (m 3/h)100908070605040302010Pressure loss-curve d e l t a P (k P a )IN025 - DN25IN032 - DN322468101214161820flo100908070605040302010Pressure loss-curved e l t a P (k P a )IN025 - DN25IN032 - DN320.81.62.43.24.04.85.66.47.28.0flow (m 3/h)100908070605040302010Pressure loss-curve d e l t a P (k P a )IN015 - DN15IN020 - DN200.81.62.43.24.04.85.66.47.28.0flo100908070605040302010Pressure loss-curved e l t a P (k P a )IN015 - DN15IN020 - DN208162432404856647280flow (m 3/h)100908070605040302010Pressure loss-curved e l t a P (k P a )IN040 - DN40IN050 - DN5008162432404856647280f100908070605040302010Pressure loss-curved e l t a P (k P a )IN040 - DN40IN050 - DN5010To meet the ever increasing quality requirements, Watts developed the snap-in check valve type IO.The O-ring is already mounted and fixated on the check valve, thus creating an easy to mount check valve.Approvals: K iwa (NL), Belgaqua (B), DVGW (D), NF - ACS (F),WRAS (UK), ETA - GDV (DK), SITAC (S), NSF (US).All dimensions are given in mm.110.81.62.43.24.04.85.66.47.28.0flow (m 3/h)100908070605040302010Pressure loss-curved e l t a P (k P a )IO015 - DN15IO020 - DN200.8 1.6 2.4 3.2 4.0 4.8 5.6 6.47.28.0flo100908070605040302010Pressure loss-curved e l t a P (k P a )IO015 - DN15IO020 - DN208162432404856647280flow (m 3/h)100908070605040302010Pressure loss-curve d e l t a P (k P a )IO040 - DN40IO050 - DN5008162432404856647280fl100908070605040302010Pressure loss-curved e l t a P (k P a )IO040 - DN40IO050 - DN5002468101214161820flow (m 3/h)100908070605040302010Pressure loss-curve d e l t a P (k P a )IO025 - DN25IO032 - DN322468101214161820flo100908070605040302010Pressure loss-curved e l t a P (k P a )IO025 - DN25IO032 - DN3212The Watts slide-in check valve type WM features a noiseless operation, very low pressure loss and absolute sealing at high and low back pressures.The split valve stem principle guarantees a trouble free operation for many years.Approvals: K iwa (NL), Belgaqua (B), DVGW (D),NF (F) except DN40, - ACS (F), ETA - GDV (DK),SITAC (S), NSF (US).Mounting dimensions Product dimensions13100908070605040302010Pressure loss-curved e l t a P (k P a )flow (m 3/h)100908070605040302010Pressure loss-curved e l t a P (k P a )flow (m 3/h)0.81.62.43.24.0 4.85.66.47.28.0flow (m/h)100908070605040302010Pressure loss-curved e l t a P (k P a )Pressure loss-curveflow (m 3/h)14Mounting dimensions Product dimensionsO-rings n o i s n em i d t c u d o r Pg n i r-Os n o i s n em i dg n i t n u oMOther diameters on request.15Auxiliary mounting toolsIn order to achieve a perfectly leaktight check valve construction, it is of crucial importance that mounting dimensions are respected.On each check valve data sheet, you will find the required mounting dimensions to be created in the housing to the check valve.In order to avoid any damage of the check valves and O-rings it is very important that check valves are mounted in the correct way.To support positioning and mounting in the right way Watts produced a mounting tool for every check valve.The dimensions of the tools are given below.Remark: dimensions are under usual reserve.All dimensions are given in mm.Via Brenno, 21 • 20853 Biassono (MB) • Italy Tel. +39 039 4986.1 • Fax +39 039 4986.222******************************•© 2017 WattsThe descriptions and photographs contained in this product specification sheet are supplied by way of information only and are not binding.Watts Industries reserves the right to carry out any technical and design improvements to its products without prior notice. Warranty: All sales and contracts for sale are expressly conditioned on the buyer’s assent to Watts terms and conditions found on its website at . Watts hereby objects to any term, different from or additional toWatts terms, contained in any buyer communication in any form, unless agreed to in a writing signed by an officer of Watts.CHECK-VALVES-TS-IT-W-UK-05-17-Rev0。
