Check Valves

Check valves are designed to stop the flow in one direction and have unrestricted flow in the opposite direction. Typically a check valve has a spring-preloaded ball or a plunger pressing on the seat. The seat conforms to the plug, and has a through-hole such as an orifice to allow the pressure from the opposite side of the plug overcoming the spring preloading force.

Check-All Valve

Stainless 316 Housing Universal Low Pressure Check Valve, Stainless Spring, Female NPT

Check valve in a single-piece stainless steel body, where the housing is machined from bar stock for a compact design. This check valve has minimum pressure drop and has a maintenance-free long life. Connections are female NPT threads conforming to ASME B1.20.1. Typical applications include in-line check valves to prevent back-flow, or pressure relief valves or vacuum breakers with low spring settings.

ConnectionsCracking PressureHousing MaterialSpring MaterialSeat MaterialMfg. P/N.Encole P/N.Price
Female NPT 4"1.5 psiAISI 316AISI 316Metal-to-MetalU3NSSMT1.50SS321A1173$310.90each
Female NPT 4"1.5 psiAISI 316AISI 316VitonU3NSSVT1.50SS321A1172$303.90each
Female NPT 4"1.5 psiAISI 316AISI 316KalrezU3NSSKZ1.50SS321A1171$363.90each
Female NPT 4".500 psiAISI 316AISI 316Metal-to-MetalU3NSSMT.500SS321A1169$310.90each
Female NPT 4"1.5 psiAISI 316AISI 316Buna-NU3NSSBN1.50SS321A1170$303.90each
Female NPT 4".500 psiAISI 316AISI 316VitonU3NSSVT.500SS321A1168$303.90each
Female NPT 4".500 psiAISI 316AISI 316KalrezU3NSSKZ.500SS321A1167$363.90each
Female NPT 4".125 psiAISI 316AISI 316Metal-to-MetalU3NSSMT.125SS321A1165$310.90each
Female NPT 4".500 psiAISI 316AISI 316Buna-NU3NSSBN.500SS321A1166$303.90each
Female NPT 4".125 psiAISI 316AISI 316VitonU3NSSVT.125SS321A1164$303.90each
Female NPT 4".125 psiAISI 316AISI 316KalrezU3NSSKZ.125SS321A1163$363.90each
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Check-All Valve

Brass Housing Universal Low Pressure Check Valve, Stainless Spring, Female NPT

Brass housing and a 316 stainless-steel spring check valves in a single-piece body construction. Housing is machined from a bar stock for a compact design. Choose by a spring cracking pressure and a seat material. Connections are female NPT threads conforming to ASME B1.20.1.

ConnectionsCracking PressureHousing MaterialSpring MaterialSeat MaterialMfg. P/N.Encole P/N.Price
Female NPT 4".500 psiBrassAISI 316NeopreneU3NBRNE.125SS321A1052$489.00each
Female NPT 4"1.5 psiBrassAISI 316NeopreneU3NBRNE1.50SS321A1053$489.00each
Female NPT 4".125 psiBrassAISI 316NeopreneU3NBRNE.125SS321A1051$489.00each
Female NPT 3".500 psiBrassAISI 316NeopreneU3MBRNE.500SS321A1048$426.00each
Female NPT 3"1.5 psiBrassAISI 316NeopreneU3MBRNE1.50SS321A1049$426.00each
Female NPT 3".125 psiBrassAISI 316NeopreneU3MBRNE.125SS321A1047$426.00each
Female NPT 2-1/2"1.5 psiBrassAISI 316NeopreneU3CBRNE1.50SS321A1045$390.00each
Female NPT 2-1/2".500 psiBrassAISI 316NeopreneU3LBRNE.500SS321A1044$390.00each
Female NPT 2-1/2".125 psiBrassAISI 316NeopreneU3LBRNE.125SS321A1043$390.00each
Female NPT 2"1.5 psiBrassAISI 316NeopreneU3KBRNE1.50SS321A1041$327.00each
Female NPT 2".500 psiBrassAISI 316NeopreneU3KBRNE.500SS321A1040$327.00each
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Check-All Valve

Carbon Steel Housing Universal Low Pressure Check Valve, 17-7PH Spring, Female NPT Ends

Carbon steel housing and a 17-7PH stainless-steel spring check valves in a single-piece body construction. Housing is machined from a bar stock for a compact design. Choose by a spring cracking pressure and a seat material. Connections are female NPT threads conforming to ASME B1.20.1.

ConnectionsCracking PressureHousing MaterialSpring MaterialSeat MaterialMfg. P/N.Encole P/N.Price
Female NPT 4".500 psiAISI 31617-7PHAflasU3NCSAS.500PH321A1183$310.98each
Female NPT 3".500 psiAISI 31617-7PHAflasU3MCSAS.500PH321A1182$309.98each
Female NPT 2-1/2".500 psiAISI 31617-7PHAflasU3LCSAS.500PH321A1181$347.98each
Female NPT 1-1/2".500 psiAISI 31617-7PHAflasU3JCSAS.500PH321A1179$276.98each
Female NPT 2".500 psiAISI 31617-7PHAflasU3KCSAS.500PH321A1180$249.98each
Female NPT 1-1/4".500 psiAISI 31617-7PHAflasU3ICSAS.500PH321A1178$209.98each
Female NPT 1".500 psiAISI 31617-7PHAflasU3HCSAS.500PH321A1177$202.98each
Female NPT 3/4".500 psiAISI 31617-7PHAflasU3FCSAS.500PH321A1176$184.98each
Female NPT 1/2".500 psiAISI 31617-7PHAflasU3DCSAS.500PH321A1175$179.98each
Female NPT 3/8".500 psiAISI 31617-7PHAflasU3CCSAS.500PH321A1174$94.98each
GTC Products Inc.

Check Valves for Ultra Clean Applications, Tube Butt Welds, Electropolished 316L VAR SS

Check valves in electropolished 316L stainless steel body having no internal spring for ultra high purity applications. Typical uses are vacuum lines in Class 10,000 semiconductor fabs. These valve have a springless design with all welded construction ensuring chatter-free operation. An ideal choice for applications with requirements for particle-free generation, such as in vacuum reactor vessels, photonics, medical and pharmaceutical equipment. Inlet and outlet end connections are identical tube stubs of standard size, ready for butt-welding into the plumbing lines at customer site. These valves are assembled and tested in the GTC Products, Texas USA facility.

ConnectionsCracking PressureHousing MaterialSpring MaterialSeat MaterialMfg. P/N.Encole P/N.Price
1/2" Weld Stub3 psiAISI 316LNo SpringKalrezCV2-88-KZ321A1193$294.00each
3/8" Weld Stub3 psiAISI 316LNo SpringKalrezCV2-66-KZ321A1192$290.00each
1/4" Weld Stub3 psiAISI 316LNo SpringKalrezCV2-TT-KZ321A1191$287.00each
1/2" Weld Stub3 psiAISI 316LNo SpringVitonCV2-88321A1186$197.00each
3/8" Weld Stub3 psiAISI 316LNo SpringVitonCV2-66321A1185$194.00each
1/4" Weld Stub3 psiAISI 316LNo SpringVitonCV2-TT321A1184$190.00each

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