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

®

DFT’s family of In-Line Check Valves are available in a variety of designs:• Basic-Check®

• Restrictor Check• SCV®

• SCV-R®

• Vacuum Breaker• DLC®

• BNCTM

• Excalibur®

• GLC®

• GLC®-Cast Iron• PDC®

• DSV®

• ALC®

• FBC®

• WLC®

• WLC®-Cast Iron• Y-Calibur®

DFT® Basic-Check® Valve

DFT® 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• Versatile• Options:•Softseat

DFT® Model SCV-R® Check Valve

DFT® Model DSV® Sanitary Check Valve

www.dft-valves.com Fax: 610-524-9242

DFT® Model DLC® Check Valve

• Straightthruinlineor offsetinlet/outlet

DFT® Vacuum Breakers• 1”to4”linesize(MNPT)• 450to6000CWP• ThreadedO.D.(MNPT)• Unthreadedinletbore• Stainlesssteelconstruction• Edge-guideddisc• Springassistedsilentclosing,non-slam• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Easymaintenance• Versatile• Options:•Inconel®X-750spring•Softseat

DFT® Model SCV® Check Valve

• 1/2”to4”linesize• 150CWP,108ASMEpressureclass• Clampedends• 316Lbodyandseat• 316disc,spring&guideassembly• 25Rainternalsurfacefinish• Electropolishedspring(15Ra) •.16to.66psigcrackingpressure• EPDMbodyseal• Edge-guideddisc(1/2”thru2”)• Center-guideddisc(2-1/2”thru4”)• Springassistedsilentclosing,non-slam• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Options: •15Rainternalsurfacefinish •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• Options: •Alloy20orHastelloy®Cbody •Sealweldbody •316SSspring •Softseat

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

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

• 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

DFT® Excalibur® Silent 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• Easymaintenance• Versatile

DFT® Model GLC® Silent Check Valve• 2”to42”linesize*• ASMEclass150to2500• RF&RTJflangedends• “Short”face-to-facedimensions• StandardBodyMaterials:** •A216WCBcarbonsteel •A351CF8Mstainlesssteel• Stainlesssteeltrim• Center-guided/dual-guidedstem• Springassistedsilentclosing,non-slam• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Protectedspring• AxialFlow• Nozzlestyle• Easymaintenance• Versatile

DFT® Model PDC® Check Valve• Pulse-dampeddesignformodulating“air”or“gas”applications •Dischargeofreciprocatingair/gascompressors •Self-sizing• 2”to20”linesize*• ASMEclass150to1500• RF&RTJflangedends• ASMEB16.10face-to-facedimensions• StandardBodyMaterials:** •A216WCBcarbonsteel •A351CF8Mstainlesssteel •A352LCClow-carbonsteel• Stainlesssteeltrim• Center-guided/dual-guidedstem• Springassistedsilentclosing,non-slam• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Protectedspring• AxialFlow• Nozzlestyle

• 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• Waferandwafer-lugdesigns• AxialFlow• Nozzlestyle

DFT® Model ALC® Wafer Style Check Valve

3Toll-Free: 800-206-4013 Email: dft@dft-valves.comTel: 610-363-8903

DFT® Nickel-Aluminum Bronze Valves • Excalibur®-NAB • GLC® - NABThesesilentcheckvalvesarespring-assisted,nozzlestyle,non-slamcheckvalvesthataredesignedtowithstandtheharshenvironmentsofsaltandbrackishwaterapplicationswherecorrosionresistanceandmarinelifedeterrentsareamust.DFT’scenterguidedcheckvalvesprovidereliable,low-maintenanceserviceandsolvetheproblemsassociatedwithwaterhammerandsevereapplicationsandenvironments.SeeDFT®ModelExcalibur®SilentCheckValve&DFT®ModelGLC®SilentCheckValveaboveforacompletelistsoffeatures.

*ConsultDFTforlargersizes.**ConsultDFTforadditionalalloys.

DFT® Model 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

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

•Stellite®trim

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

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

•Stellite®trim

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

DFT® Model FBC® Compact Insert Check Valve

DFT® Model WLC®-Cast Iron Wafer Style Check Valve

DFT® Model GLC®-Cast Iron Silent Check Valve

DFT® Y-Calibur® Silent Check Valve • Fullyrepairablein-line• 4”to14”linesize• ASMEclass600to2500• Buttweldends• ASMEB16.10face-to-face dimensions• StandardBodyMaterials:** •A216WCBcarbonsteel •A351CF8Mstainlesssteel• Stainlesssteeltrim• Center-guided/dual-guidedstem• Springassistedsilentclosing• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Protectedspring• AxialFlow• Nozzlestyle• Easymaintenance• Versatile• Options: •Inconel®X-750spring •SoftSeat •Customsizingforlowflowapplications •Stellite®trim

*ConsultDFTforlargersizes**ConsultDFTforadditionalalloys.

• 1”to4”linesize• ASMEclass150and300• MeetsASMEB16.34-2013&MSSSP-126• UseinSchedule40pipe, consultfactoryforSchedule80• Stainlesssteelconstruction• Edge-guideddisc• Springassistedsilentclosing,non-slam• Tightshutoff–lappeddisc&seat• Horizontalorverticalinstallation• Extendedtagforeasyidentification oftheinstalledvalve• Easymaintenance• Versatile

• 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

DFT® Model BNCTM -In-Line Globe Style Check Valve

www.dft-valves.com Fax: 610-524-9242

• 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• AxialFlow• Nozzlestyle• Options: •Inconel®X-750spring •Customsizingforlowflowapplications For the most recent Codes & Standards PagePlease visit the DFT website:www.dft-valves.com/literature

Valve Selection ChartTHREADED VALVES FLANGED VALVES

SANI

TARY

VA

LVES

WAFER VALVES

Basic

-Che

ck®

Restr

ictor

Ch

eck

SCV®

SCV-

R®

Vacu

um

Brea

ker

DLC®

Exca

libur

®

GLC®

GLC®

- CA

ST IR

ON

PDC®

DSV®

ALC®

FBC®

WLC

®

WLC

® -CA

ST IR

ON

Y-CA

LIBUR

®

BNCTM

Exca

libur

®

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 20 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

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

IN-L

INE

REPA

IRAB

LEVA

LVES

BUTT WELD VALVES

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

6. Inconel® X-750 spring is standard.

* CF8M is the cast grade of 316 SS.

1 www.dft-valves.com dft@dft-valves.com

for more informationFACTORYDFT Inc.140 Sheree Boulevard P.O. Box 566Exton, PA 19341-0566

610-363-8903800-206-4013FAX 610-524-9242EMAIL dft@dft-valves.comINTERNET www.dft-valves.com

REPRESENTED BY:

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 AK Steel 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 E.I. DuPont Corp. ALC®, Basic-Check®, DFT®, DLC®, DSV®, Excalibur®, FBC®, GLC®, PDC®, SCV®, SCV-R®, 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. 4_10.2015

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 valves 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.

For more information on Check Valve Sizing and Selection:

Download DFT’s Valve Sizing eBook at www.dft-valves.com/literature

or Consult with the experts at DFT

to choose the optimal check valve for your 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.