spring-assisted, non-slam, axial flow, silent check valves · 2018. 10. 18. · • spring assisted...
TRANSCRIPT
For more informationFACTORYDFT Inc.140 Sheree Boulevard P.O. Box 566Exton, PA 19341-0566
610-363-8903800-206-4013FAX 610-524-9242EMAIL [email protected] 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®, 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. 5_12.2017
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®
• TLW®
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.
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.
6D-0885
®
Spring-assisted, Non-slam, Axial Flow, Silent Check Valves
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• Versatile• Options:•Softseat
SCV-R® Check Valve
DSV® Sanitary Check Valve
www.dft-valves.com Fax: 610-524-9242
DLC® Check Valve
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• Easymaintenance• Versatile
GLC® Check Valve• 2”to42”linesize*• ASMEclass150to2500• RF&RTJflangedends• “Short”face-to-facedimensions• API6D• 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• Protectedspring• AxialFlow
• 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• Waferdesigns• AxialFlow• Nozzlestyle
ALC® Wafer Style Check Valve
3Toll-Free: 800-206-4013 Email: [email protected]: 610-363-8903
• Straightthruinlineor offsetinlet/outlet
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
SCV® Check Valve
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.
• 1/2”to4”linesize• 150CWP,108ASMEpressureclass• Meets3AStandard58-01• CIP(CleanInPlace)• Clampedends• 316Lbodyandseat• 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• 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
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
•Nozzlestyle•Easymaintenance•Options: •Inconel®X-750spring •Softseat
• Options: •Inconel®X-750spring •Softseat •Customsizingforlowflowapplications
•Stellite®trim
• Easymaintenance• Versatile• Options: •316SSspring •Softseat •Customsizingforlowflowapplications
•Axialflow•Nozzlestyle•Options:-316SSspring-Customsizing-lowflow-Softseat-NACE(SeeDFTCatalog,page41)
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• Versatile• Options:•Softseat
SCV-R® Check Valve
DSV® Sanitary Check Valve
www.dft-valves.com Fax: 610-524-9242
DLC® Check Valve
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• Easymaintenance• Versatile
GLC® Check Valve• 2”to42”linesize*• ASMEclass150to2500• RF&RTJflangedends• “Short”face-to-facedimensions• API6D• 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• Protectedspring• AxialFlow
• 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• Waferdesigns• AxialFlow• Nozzlestyle
ALC® Wafer Style Check Valve
3Toll-Free: 800-206-4013 Email: [email protected]: 610-363-8903
• Straightthruinlineor offsetinlet/outlet
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
SCV® Check Valve
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.
• 1/2”to4”linesize• 150CWP,108ASMEpressureclass• Meets3AStandard58-01• CIP(CleanInPlace)• Clampedends• 316Lbodyandseat• 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• 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
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
•Nozzlestyle•Easymaintenance•Options: •Inconel®X-750spring •Softseat
• Options: •Inconel®X-750spring •Softseat •Customsizingforlowflowapplications
•Stellite®trim
• Easymaintenance• Versatile• Options: •316SSspring •Softseat •Customsizingforlowflowapplications
•Axialflow•Nozzlestyle•Options:-316SSspring-Customsizing-lowflow-Softseat-NACE(SeeDFTCatalog,page41)
WLC®-Cast Iron Wafer Style Check Valve
GLC®-Cast Iron Silent Check Valve
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
*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
PB 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
Need a detailed cut sheet of a DFT Check Valve? Visit us online at www.dft-valves.com/literature
• 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• Extendedtagforeasyidentification oftheinstalledvalve• Easymaintenance• Versatile
Nickel-Aluminum Bronze Check Valves • Excalibur®-NAB • GLC® - NABThesesilentcheckvalvesarespring-assisted,nozzlestyle,non-slamcheckvalvesthataredesignedtowithstandtheharshenvironmentsofsaltandbrackishwaterapplicationswherecorrosionresistanceandmarinelifedeterrentsareamust.DFT’scenterguidedcheckvalvesprovidereliable,low-maintenanceserviceandsolvetheproblemsassociatedwithwaterhammerandsevereapplicationsandenvironments.SeeDFT®ModelExcalibur®SilentCheckValve&DFT®ModelGLC®SilentCheckValve(left)foracompletelistsoffeatures.
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®
/ TLW
®
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 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
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 [email protected]
For more informationFACTORYDFT Inc.140 Sheree Boulevard P.O. Box 566Exton, PA 19341-0566
610-363-8903800-206-4013FAX 610-524-9242EMAIL [email protected] 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®, 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. 5_12.2017
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®
• TLW®
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.
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.
6D-0885
®
Spring-assisted, Non-slam, Axial Flow, Silent Check Valves