World Class Manufacturer of Check Valves

®

®

®6D-0885

Spring-assisted, Non-slam, Axial Flow, Silent Check Valves

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Basic-Check® Valve

Restrictor Check Valve• Highercrackingpressures(2to40psi,dependingonsize)

• 1/4”to2-1/2”linesize(MNPT)• 450to2500CWP• NPTThreadedends• Stainlesssteelconstruction• Edge-guideddisc• Springassistedsilentclosing,non-slam

• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Easymaintenance

SCV-R® Check Valve

DSV® Sanitary Check Valve

DLC® Check Valve

• Straightthruinlineoroffsetinlet/outlet

Vacuum Breakers• 1”to4”linesize(MNPT)• 450to6000CWP• ThreadedO.D.(MNPT)• Unthreadedinletbore• Stainlesssteelconstruction• Edge-guideddisc• Springassistedsilentclosing,non-slam

• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Easymaintenance• Versatile

SCV® Check Valve

• 1/2”to4”linesize• 150CWP,108ASMEpressureclass• Meets3AStandard58-01• CIP(CleanInPlace)• Clampedends• 316Lbodyandseat(A351CF3M)• 316disc,spring&guideassembly• 32Rainternalsurfacefinish

(#4GroundFinish)• Electropolishedspring•.16to.66psigcrackingpressure

• EPDMbodyseal(300°Fmaxtemp.)• Edge-guideddisc(1/2”thru2”)• Edge/center-guideddisc(2-1/2”,3”,4”)• Springassistedsilentclosing,non-slam• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Options:•15Rainternalfinish•Tuf-Flex®orViton®bodyseal

• 1/2”to3”linesize• 750&3600CWP• FNPTorSocketWeldends• Stainlesssteelconstruction• Inconel®X-750spring• Zelon®“O”ringbodyseal• Edge-guideddisc• Springassistedsilentclosing,non-slam

• Tightshutoff–lappeddisc&seat

• Horizontalorverticalinstallation• Simplified5-partconstruction• Easymaintenance• Versatile

• Highercrackingpressures(.8to40.8psig)

• 1/2”to2”linesize• 750CWP• FNPTorSocketWeldends• Stainlesssteelconstruction• Inconel®X-750spring• Zelon®“O”ringbodyseal• Edge-guideddisc• Springassistedsilentclosing,non-slam

• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Easymaintenance• Versatile

• 1/2”to3”linesize• ASMEclass150and300• RFflangedends• ASMEB16.10face-to-facedimensions

• Stainlesssteelconstruction• Inconel®X-750spring• Electronbeamweldedbody• Edge-guideddisc• Springassistedsilentclosing,non-slam

• Tightshutoff–lappeddisc&seat

• Horizontalorverticalinstallation

• Simplified4-partconstruction• Versatile

• 1/4”to2-1/2”linesize(MNPT)• 450to6000CWP• NPTThreadedends• Stainlesssteelconstruction• Edge-guideddisc• Springassistedsilentclosing,non-slam• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Easymaintenance• Versatile• Options:•Inconel®X-750spring•Softseat

• Options:•Alloy20orHastelloy®Cbody•Sealweldbody•316SSspring•Softseat

• Options:• Alloy20orHastelloy®Cbody•Sealweldbody•316SSspring•Softseat

• Versatile• Options:•Softseat

• Options:•Inconel®X-750spring•Softseat

• Options:•Alloy20orHastelloy®Cbody•316SSspring•Softseat(TFE-Viton®only)

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Excalibur® Check Valve• 2”to24”linesize*• ASMEclass150to1500• RF&RTJflangedends,buttweldends

• ASMEB16.10face-to-facedimensions

• StandardBodyMaterials:**•A216WCBcarbonsteel•A351CF8Mstainlesssteel

• Stainlesssteeltrim• Center-guided/dual-guidedstem• Springassistedsilentclosing,non-slam

• Tightshutoff–lappeddisc&seat• Two-piecebody• Horizontalorverticalinstallation• Protectedspring• AxialFlow• Nozzlestyle

GLC® Check Valve• 2”to42”linesize*• ASMEclass150to2500• RF&RTJflangedends• “Short”face-to-facedimensions• MeetsAPI6D• API6FDFireTest•ASMEclass150and300,2”to24”

• StandardBodyMaterials:**•A216WCBcarbonsteel•A351CF8Mstainlesssteel

• Stainlesssteeltrim• Center-guided/dual-guidedstem• Springassistedsilentclosing,non-slam• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Protectedspring• AxialFlow• Nozzlestyle• Easymaintenance

PDC® Check Valve• Pulse-dampeddesignformodulating“air”or“gas”applications•Dischargeofreciprocatingair/gascompressors•Self-sizing

• 2”to26”linesize*• ASMEclass150to1500• RF&RTJflangedends• ASMEB16.10face-to-facedimensions

• API6D• StandardBodyMaterials:**•A216WCBcarbonsteel•A351CF8Mstainlesssteel•A352LCClow-carbonsteel

• Stainlesssteeltrim• Center-guided/dual-guidedstem• Springassistedsilentclosing,non-slam

• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation

• 2”to24”linesize• ASMEclass150and300• RFwaferends• API594face-to-facedimensions• StandardBodyMaterials:•A216WCBcarbonsteel•A351CF8Mstainlesssteel

• Stainlesssteelseat,disc&bushing• Nitronic®60stem• Inconel®X-750spring• Center-guidedstem• Springassistedsilentclosing,non-slam• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Protectedspring• Waferdesign• AxialFlow• Nozzlestyle

ALC® Wafer Style Check Valve

3

TLW® Tapped Lug Wafer Check Valve•Sizes2”thru24”linesize•ASMEclass150and300•ThreadedLugDesign•ASMEB16.5•RFflangedends•API594face-to-facedimensions•Standardbodymaterials:•A216GradeWCBcarbonsteel•A351CF8Mstainlesssteel•Stainlesssteelseat,disc&bushing•Nitronic®60stem•Inconel®X-750Spring•SeatLeakageperMSSSP-61•Tappedholesinbodyforliftinglugs(10”sizeandlarger)•Horizontalorverticalinstallation•Center-guidedstem•Spring-assistedsilentclosing

*ConsultDFTforlargersizes.**ConsultDFTforadditionalalloys.

WLC® Wafer Style Check Valve• 1”to10”linesize• ASMEclass150to2500• RF&RTJwaferends• Face-to-facedimensions:•MSSSP-126(class150and300)•API594(class600andabove)

• StandardBodyMaterials:•A216WCBcarbonsteel•A351CF8Mstainlesssteel

• Optionalbodymaterials•Alloy20•Inconel®625•Titanium•Hastelloy®•DuplexSS

• Stainlesssteeltrim• Center-guided/dual-guidedstem• Springassistedsilentclosing,non-slam• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Protectedspring• Waferdesign

• AxialFlow• Nozzlestyle• EasyMaintenance• Versatile• Options:•Inconel®X-750spring•Softseat•Customsizingforlowflowapplications•Stellite®trim

• Versatile• Options:•Inconel®X-750spring•Softseat•Customsizingforlowflowapplications•Stellite®trim•CryogenicService

• Protectedspring• AxialFlow• Nozzlestyle• Easymaintenance• Options:•Inconel®X-750spring•Softseat

• Easymaintenance• Versatile• Options:•Inconel®X-750spring•Softseat•Customsizingforlowflowapplications•Stellite®trim

• Easymaintenance• Versatile• Options:•316SSspring•Softseat•Customsizingforlowflowapplications

•Axialflow•Nozzlestyle•Options:• 316SSspring• Customsizing-lowflow• Softseat• NACE(SeeDFTCatalog)

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WLC®-Cast Iron Wafer Style Check Valve

GLC®-Cast Iron Check Valve

Y-Calibur® Check Valve• Fullyrepairablein-line• 4”to14”linesize*• ASMEclass600to2500• Buttweldends• ASMEB16.10face-to-facedimensions

• StandardBodyMaterials:**•A216WCBcarbonsteel•A351CF8Mstainlesssteel

• Stainlesssteeltrim• Center-guided/dual-guidedstem• Springassistedsilentclosing• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Protectedspring• AxialFlow• Nozzlestyle• Easymaintenance• Versatile

stem

*ConsultDFTforlargersizes **ConsultDFTforadditionalalloys.

• 2-1/2”to24”linesize• ASMEclass125and250•2½”to24”linesize(Cl.125)•2½”to8”linesize(Cl.250)

• FFFlangedends• MeetsMSSSP-125• A126ClassBCastironbody• Bronzeor316SStrim• Center-guided/dual-guidedstem• Springassistedsilentclosing,non-slam

• AWWAseatleakage• Horizontalorverticalinstallation• AxialFlow• Nozzlestyle• Easymaintenance

• 2”to10”linesize• ASMEclass125and250• FFwaferends• MeetsMSSSP-125• A126ClassBCastironbody• Bronzeor316SStrim• Center-guided/dual-guidedstem• Springassistedsilentclosing,non-slam

• AWWAseatleakage• Horizontalorverticalinstallation• Protectedspring• Waferdesign• AxialFlow• Nozzlestyle• Easymaintenance

BNCTM In-Line Globe Style Check Valve• 10”to24”linesize*• ASMEclass600,900and1500• Buttweldends• ASMEB16.34• StandardBodyMaterials:**•A216WCBcarbonsteel•A351CF8Mstainlesssteel

• Stainlesssteeltrim• Hardfacedseatanddisc• Center-guided/dual-guidedstem• Springassistedsilentclosing• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Onepieceglobestylebody,notrepairablein-line

• Protectedspring

stem

• Options:• Inconel®X-750spring• SoftSeat• Customsizingforlowflowapplications• Stellite®trim

• AxialFlow• Nozzlestyle• Options:• Inconel®X-750spring• Customsizingforlowflowapplications

FBC® Compact Insert Check Valve• 1”to4”linesize• ASMEclass150and300• MeetsASMEB16.34-2013&MSSSP-126• UseinSchedule40pipe,consultfactoryforSchedule80

• Stainlesssteelconstruction• Edge-guideddisc• Springassistedsilentclosing,non-slam• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Extendedtagforeasyidentificationoftheinstalledvalve

• Easymaintenance• Versatile

Nickel-Aluminum Bronze Check Valves • Excalibur®-NAB• GLC® - NABThesesilentcheckvalvesaredesignedtowithstandtheharshenvironmentsofsaltandbrackishwaterapplicationswherecorrosionresistanceandmarinelifedeterrentsareamust.

• Springassistedsilentclosing• Center-guided/dual-guidedstem• Nozzlestyle• Easymaintenance• Solvesproblemsassociatedwithwaterhammerinsevereapplicationsandenvironments

SeeDFT®ModelExcalibur®SilentCheckValve&DFT®ModelGLC®SilentCheckValve(left)foracompletelistsoffeatures.

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THREADED VALVES FLANGED VALVES

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SIZE 1/4 to 2-1/2

1/4 to 2-1/2 1/2 to 3 1/2 to 2 1 to 4

(OD) 1/2 to 3 2 to 24 1 to 42 2-1/2 to 42 2 to 26 1/2 to 4 2 to 24 1 to 4 1 to 10 2 to 10 4 to 14 10 to 24 2 to 24

ENDSNPT X X X(1) X(1) XSW X(1) X(1)FLG X X X X XRTJ X X X XBW X X X

FLG/BW XVictaulic® X

Wafer X X X XClamped X

ASME CLASS125 X X150 X X X X X X X X 250 X X300 X X X X X X X X600 X X X X X X X900 X X X X X X X

1500 X X X X X X X2500 X X X X

750 CWP X X3600 CWP X

OTHER X(2) X(2) X(2) X(3) X(2) X(3)

MATERIALS BODY/TRIMCast Iron X(4) X(4)

WCB/316 SS* X X X X X X X X316 SS/316 SS* X(5) X(5) X X X(5) X X X X X(5) X X X X X XOther Alloys X X X X X X X X X X

OPTIONSSoft Seat X X X X X X X X X X X X X X X X

X-750 Spring X X X(6) X(6) X X(6) X X X X(6) X X X X X

Valve Selection Chart

Visit the literature page at dft-valves.com and use the DFT® VALVE DATA SHEET to make your selection based on your requirements.

Notes: 1. NPT x SW available.2. CWP RATING BSS, BSA, BSE, BSSV, Restrictor Check: 450 to 2500 CWP

depending on size; BSSH6, BSSV6: 450 to 6000 CWP depending on size. BSSH7: 800 to 6000 CWP depending on size. DSV: ASME/ANSI Class 108.

3. API 2000 and 5000 ARE AVAILABLE. Contact DFT for sizes.4. TRIM MATERIAL: BRONZE OR 316 SS

5. BODY & SEAT: BSE, BSS, BSSV. Restrictor Check: 303 SS, BSA: 416 SS, BSSH6, BSSH7, BSSV6: 316 SS, DSV:316L SS (A351 CF3M)

6. Inconel® X-750 spring is standard.

* CF8M is the cast grade of 316 SS.

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DFT® valves serve broad process industries:• Chemical• Food & Beverage• General Industry• Mining• Oil and Gas

• Petrochemical• Pharmaceutical• Power Generation• Pulp and Paper• Steel

• Textile• Ultra-pure Water• Desalination

®

Hastelloy® is a Registered Trademark of Haynes International Inc.; Inconel® and Monel® are Registered Trademarks of Special Metal Corporation; Nitronic® is a Registered Trademark of Huntington Alloys Corporation; Stellite® is a Registered Trademark of Kennametal Inc.; Tuf-Flex® is a Registered Trademark of Rubber Fab Inc.; Teflon® and Viton® are Registered Trademarks of The Chemours Company FC, LLC; ALC®, Basic-Check®, DFT®, DLC®, DSV®, Excalibur®, FBC®, GLC®, PDC®, SCV®, SCV-R®, TLW® , WLC®, Y-Calibur®, Zelon® are Registered Trademarks of DFT Inc. BNC™ and The Check Valve Doctor™ are trademarks of DFT Inc. All other trademarks are the properties of their respective owners and are used for purposes of identification only.

REV. 6_12.2018

The Importance of Check Valve Selection and Sizing

Knowing which check valves can withstand different environmental factors, and how check valve sizing works is the key to a longer lifetime of use, proper flow and overall efficiency of your fluid, steam or gas flow system.

It is important that check valves be sized for their application and flow, not based just on their line size. Choosing the appropriate-sized check valve means it will be working at its highest level, providing efficient service with maximum protection. Proper check valve sizing will optimize a system’s reliability, providing the longest and most trouble free service. An undersized valve will cause higher pressure losses and create excessive noise and vibration, and an oversized valve can lead to premature wear and failure of the valve’s internal components. When the valve’s disc is stable and in the fully open position against the internal stop or fully closed position against the seat, no disc fluttering will occur.

The correct valve selection not only allows the valves to last longer, but pumps and other related components on the same system will have increased longevity as well, resulting in reduced overall maintenance and costs. Well functioning check valves also enhance the safety of their applications.

DFT Inc. specializes in preventing check valve problems and failures caused by water hammer and reverse flow. The in-line, spring-assisted check valves are designed to meet customer requirements for horizontal and vertical installations in liquids, gas or steam.

Whatever your size, pressure or piping configurations, DFT has the valve that’s right for you.

Consult DFT for engineered sizing solutions for your check valve related issues.

Spring-assisted, Non-slam, Axial Flow, Silent Check Valves

®

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