Check Valves | Encole
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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 valves designated for applications in ultra high purity, UHP are typically used in photonics, semiconductor fabs or bio-pharma.

GTC Products Inc.

Ultra High Purity Check Valve, Female VCR to Male VCR, Electropolished 316L VAR SS

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Inlet connection is a female VCR® fitting, the outlet connection is a fixed male VCR® Swagelok fitting. This ultra high purity check valve is made from electropolished 316L stainless steel body having no internal spring. An ideal choice for applications with requirements for particle-free generation, such as in vacuum reactor vessels, photonics, medical and pharmaceutical equipment.
Inlet Outlet Housing Material Cracking Pressure Mfg P/N Encole P/N Price
VCR 1/4” Female VCR 1/4” 316L VAR SS 3 psi CV2-FM 818E301 $ 687.00 each

GTC Products Inc.

Ultra High Purity Check Valves, Female VCR® Unions, Electropolished 316L VAR SS

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Both inlet and outlet connections are identical female VCR® Swagelok fittings. Typical uses are vacuum lines in Class 10,000 semiconductor fabs. This valve has a springless design with all welded construction ensuring chatter-free operation.
Inlet Outlet Housing Material Cracking Pressure Mfg P/N Encole P/N Price
VCR 1/4” Female VCR 1/4” Female 316L VAR SS 3 psi CV2-FF 820E601 $ 805.50 each
VCR 1/2” Female VCR 1/2” Female 316L VAR SS 3 psi CV2-F8F8 820E602 $ 871.00 each

GTC Products Inc.

Ultra High Purity Check Valve, Male VCR to Female VCR Connections, Electropolished 316L VAR SS

Check-Valve-CV2-MF-GTC-Products.png
Inlet connection is a male VCR® fitting, outlet connection is a female VCR® Swagelok fitting. This is an ultra high purity check valve in Vacuum Arc Remelt (VAR) electropolished 316L stainless steel body having no internal spring. The valve has a springless design with all welded construction ensuring chatter-free operation.
Inlet Outlet Housing Material Cracking Pressure Mfg P/N Encole P/N Price
VCR 1/4” Female VCR 1/4” 316L VAR SS 3 psi CV2-MF 819E301 $ 687.00 each

GTC Products Inc.

Ultra High Purity Check Valves, Female VCR to Swivel Male VCR Connections, Electropolished 316L VAR SS

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Inlet is Female VCR®, outlet is Swivel Male VCR® Swagelok fittings. Typical uses are vacuum lines in Class 10,000 semiconductor fabs. These valves have a springless design with all welded construction ensuring chatter-free operation.
Inlet Outlet Housing Material Cracking Pressure Mfg P/N Encole P/N Price
VCR 1/4” Female VCR 1/4” Swivel Male 316L VAR SS 3 psi CV2-FF 821E601 $ 687.00 each
VCR 1/2” Female VCR 1/2” Swivel Male 316L VAR SS 3 psi CV2-F8F8 821E602 $ 718.00 each

GTC Products Inc.

Ultra High Purity Check Valves, Swivel Male VCR to Female VCR Connections, Electropolished 316L VAR SS

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Inlet is a Swivel Male VCR® and the outlet is a Female VCR® Swagelok fittings. These are Ultra high purity check valves in electropolished 316L stainless steel body having no internal spring. Typical uses are vacuum lines in Class 10,000 semiconductor fabs.
Inlet Outlet Housing Material Cracking Pressure Mfg P/N Encole P/N Price
VCR 1/4” Swivel Male VCR 1/4” Female 316L VAR SS 3 psi CV2-M4F 822E601 $ 687.00 each
VCR 1/2” Swivel Male VCR 1/2” Female 316L VAR SS 3 psi CV2-M8F8 822E602 $ 718.00 each

GTC Products Inc.

Ultra High Purity Check Valves, Swivel Male VCR® Union, Electropolished 316L VAR SS

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Both inlet and outlet connections are identical Swivel Male VCR® Swagelok fittings.
Inlet Outlet Housing Material Cracking Pressure Mfg P/N Encole P/N Price
VCR 1/4” Swivel Male VCR 1/4” Swivel Male 316L VAR SS 3 psi CV2-M4M4 824E601 $ 692.00 each
VCR 1/2” Swivel Male VCR 1/2” Swivel Male 316L VAR SS 3 psi CV2-M8M8 824E602 $ 725.00 each

Check-All Valve

Brass Housing Universal Low Pressure Check Valves, Female NPT

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Brass housing check valves in a single-piece body construction. These valves are designed for a minimum pressure drop. Connections are female NPT threads conforming to ASME B1.20.1. These valves can be used a low pressure relief valve or vacuum breaker by choosing the desired spring settings. Brass Housing Universal Low Pressure Check Valves, Female NPT
Inlet Outlet Housing Material Cracking Pressure Mfg P/N Encole P/N Price
3/8” Female NPT 3/8” Female NPT Brass 0.125 psi U3CBR.125SS 814E14001 $ 96.72 each
1/2” Female NPT 1/2” Female NPT Brass 0.125 psi U3DBR.125SS 814E14002 $ 116.74 each
3/4” Female NPT 3/4” Female NPT Brass 0.125 psi U3FBR.125SS 814E14003 $ 149.16 each
1” Female NPT 1” Female NPT Brass 0.125 psi U3HBR.125SS 814E14004 $ 208.25 each
1-1/4” Female NPT 1-1/4” Female NPT Brass 0.125 psi U3IBR.125SS 814E14005 $ 371.45 each
1-1/2” Female NPT 1-1/2” Female NPT Brass 0.125 psi U3JBR.125SS 814E14006 $ 393.50 each
2” Female NPT 2” Female NPT Brass 0.125 psi U3KBR.125SS 814E14007 $ 436.60 each
2-1/2” Female NPT 2-1/2” Female NPT Brass 0.125 psi U3LBR.125SS 814E14008 $ 648.45 each
3” Female NPT 3” Female NPT Brass 0.125 psi U3MBR.125SS 814E14009 $ 724.80 each
4” Female NPT 4” Female NPT Brass 0.125 psi U3NBR.125SS 814E140010 $ 946.80 each
3/8” Female NPT 3/8” Female NPT Brass 0.500 psi U3CBR.500SS 814E140021 $ 96.72 each
1/2” Female NPT 1/2” Female NPT Brass 0.500 psi U3DBR.500SS 814E140022 $ 116.74 each
3/4” Female NPT 3/4” Female NPT Brass 0.500 psi U3FBR.500SS 814E140023 $ 149.16 each
1” Female NPT 1” Female NPT Brass 0.500 psi U3HBR.500SS 814E140024 $ 208.25 each
1-1/4” Female NPT 1-1/4” Female NPT Brass 0.500 psi U3IBR.500SS 814E140025 $ 371.45 each
1-1/2” Female NPT 1-1/2” Female NPT Brass 0.500 psi U3JBR.500SS 814E140026 $ 393.50 each
2” Female NPT 2” Female NPT Brass 0.500 psi U3KBR.500SS 814E140027 $ 436.60 each
2-1/2” Female NPT 2-1/2” Female NPT Brass 0.500 psi U3LBR.500SS 814E140028 $ 648.45 each
3” Female NPT 3” Female NPT Brass 0.500 psi U3MBR.500SS 814E140029 $ 724.80 each
4” Female NPT 4” Female NPT Brass 0.500 psi U3NBR.500SS 814E140030 $ 946.80 each
3/8” Female NPT 3/8” Female NPT Brass 1.50 psi U3CBR1.50SS 814E1400101 $ 96.72 each
1/2” Female NPT 1/2” Female NPT Brass 1.50 psi U3DBR1.50SS 814E1400102 $ 116.74 each
3/4” Female NPT 3/4” Female NPT Brass 1.50 psi U3FBR1.50SS 814E1400103 $ 149.16 each
1” Female NPT 1” Female NPT Brass 1.50 psi U3HBR1.50SS 814E1400104 $ 208.25 each
1-1/4” Female NPT 1-1/4” Female NPT Brass 1.50 psi U3IBR1.50SS 814E1400105 $ 371.45 each
1-1/2” Female NPT 1-1/2” Female NPT Brass 1.50 psi U3JBR1.50SS 814E1400106 $ 393.50 each
2” Female NPT 2” Female NPT Brass 1.50 psi U3KBR1.50SS 814E1400107 $ 436.60 each
2-1/2” Female NPT 2-1/2” Female NPT Brass 1.50 psi U3LBR1.50SS 814E1400108 $ 648.45 each
3” Female NPT 3” Female NPT Brass 1.50 psi U3MBR1.50SS 814E1400109 $ 724.80 each
4” Female NPT 4” Female NPT Brass 1.50 psi U3NBR1.50SS 814E1400110 $ 946.80 each
3/8” Female NPT 3/8” Female NPT Brass 3.50 psi U3CBR3.50SS 814E1400121 $ 96.72 each
1/2” Female NPT 1/2” Female NPT Brass 3.50 psi U3DBR3.50SS 814E1400122 $ 116.74 each
3/4” Female NPT 3/4” Female NPT Brass 3.50 psi U3FBR3.50SS 814E1400123 $ 149.16 each
1” Female NPT 1” Female NPT Brass 3.50 psi U3HBR3.50SS 814E1400124 $ 208.25 each
1-1/4” Female NPT 1-1/4” Female NPT Brass 3.50 psi U3IBR3.50SS 814E1400125 $ 371.45 each
1-1/2” Female NPT 1-1/2” Female NPT Brass 3.50 psi U3JBR3.50SS 814E1400126 $ 393.50 each
2” Female NPT 2” Female NPT Brass 3.50 psi U3KBR3.50SS 814E1400127 $ 436.60 each
2-1/2” Female NPT 2-1/2” Female NPT Brass 3.50 psi U3LBR3.50SS 814E1400128 $ 648.45 each
3” Female NPT 3” Female NPT Brass 3.50 psi U3MBR3.50SS 814E1400129 $ 724.80 each
4” Female NPT 4” Female NPT Brass 3.50 psi U3NBR3.50SS 814E1400130 $ 946.80 each

GTC Products Inc.

Ultra High Purity Check Valves with Tube Butt Weld Connections, Electropolished 316L VAR SS

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Tube stubs are ready to be orbital welded into the mating tubes. These are springless check valves made from Vacuum Arc Remelt (VAR) electropolished 316L stainless steel for ultra high purity applications. Typical uses are vacuum lines in Class 10,000 semiconductor fabs and applications with requirements for particle-free generation, such as in vacuum reactor vessels, photonics, medical and pharmaceutical equipment.
Inlet Outlet Housing Material Cracking Pressure Mfg P/N Encole P/N Price
1/4” Tube Weld Stub 1/4” Tube Weld Stub 316L VAR SS 3 psi CV2-TT 902E901 $ 790.50 each
3/8” Tube Weld Stub 3/8” Tube Weld Stub 316L VAR SS 3 psi CV2-66 902E902 $ 845.80 each
1/2” Tube Weld Stub 1/2” Tube Weld Stub 316L VAR SS 3 psi CV2-88 902E903 $ 925.50 each

Check-All Valve

Carbon Steel Housing Universal Low Pressure Check Valves, Female NPT

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Check valves in a single-piece body construction. Housing is made from Carbon steel. Connections are female NPT threads conforming to ASME B1.20.1. This valve can be used a low pressure relief valve or vacuum breaker by choosing the desired spring settings.
Inlet Outlet Housing Material Cracking Pressure Mfg P/N Encole P/N Price
3/8” Female NPT 3/8” Female NPT Carbon Steel 0.125 psi U3CCS.125SS 900E14001 $ 88.11 each
1/2” Female NPT 1/2” Female NPT Carbon Steel 0.125 psi U3DCS.125SS 900E14002 $ 106.32 each
3/4” Female NPT 3/4” Female NPT Carbon Steel 0.125 psi U3FCS.125SS 900E14003 $ 135.83 each
1” Female NPT 1” Female NPT Carbon Steel 0.125 psi U3HCS.125SS 900E14004 $ 189.60 each
1-1/4” Female NPT 1-1/4” Female NPT Carbon Steel 0.125 psi U3ICS.125SS 900E14005 $ 346.80 each
1-1/2” Female NPT 1-1/2” Female NPT Carbon Steel 0.125 psi U3JCS.125SS 900E14006 $ 358.45 each
2” Female NPT 2” Female NPT Carbon Steel 0.125 psi U3KCS.125SS 900E14007 $ 416.20 each
2-1/2” Female NPT 2-1/2” Female NPT Carbon Steel 0.125 psi U3LCS.125SS 900E14008 $ 606.20 each
3” Female NPT 3” Female NPT Carbon Steel 0.125 psi U3MCS.125SS 900E14009 $ 691.75 each
4” Female NPT 4” Female NPT Carbon Steel 0.125 psi U3NCS.125SS 900E140010 $ 916.45 each
3/8” Female NPT 3/8” Female NPT Carbon Steel 0.500 psi U3CCS.500SS 900E140021 $ 88.11 each
1/2” Female NPT 1/2” Female NPT Carbon Steel 0.500 psi U3DCS.500SS 900E140022 $ 106.32 each
3/4” Female NPT 3/4” Female NPT Carbon Steel 0.500 psi U3FCS.500SS 900E140023 $ 135.83 each
1” Female NPT 1” Female NPT Carbon Steel 0.500 psi U3HCS.500SS 900E140024 $ 189.60 each
1-1/4” Female NPT 1-1/4” Female NPT Carbon Steel 0.500 psi U3ICS.500SS 900E140025 $ 346.80 each
1-1/2” Female NPT 1-1/2” Female NPT Carbon Steel 0.500 psi U3JCS.500SS 900E140026 $ 358.45 each
2” Female NPT 2” Female NPT Carbon Steel 0.500 psi U3KCS.500SS 900E140027 $ 416.20 each
2-1/2” Female NPT 2-1/2” Female NPT Carbon Steel 0.500 psi U3LCS.500SS 900E140028 $ 606.20 each
3” Female NPT 3” Female NPT Carbon Steel 0.500 psi U3MCS.500SS 900E140029 $ 691.75 each
4” Female NPT 4” Female NPT Carbon Steel 0.500 psi U3NCS.500SS 900E140030 $ 916.45 each
3/8” Female NPT 3/8” Female NPT Carbon Steel 1.50 psi U3CCS1.50SS 900E1400101 $ 88.11 each
1/2” Female NPT 1/2” Female NPT Carbon Steel 1.50 psi U3DCS1.50SS 900E1400102 $ 106.32 each
3/4” Female NPT 3/4” Female NPT Carbon Steel 1.50 psi U3FCS1.50SS 900E1400103 $ 135.83 each
1” Female NPT 1” Female NPT Carbon Steel 1.50 psi U3HCS1.50SS 900E1400104 $ 189.60 each
1-1/4” Female NPT 1-1/4” Female NPT Carbon Steel 1.50 psi U3ICS1.50SS 900E1400105 $ 346.80 each
1-1/2” Female NPT 1-1/2” Female NPT Carbon Steel 1.50 psi U3JCS1.50SS 900E1400106 $ 358.45 each
2” Female NPT 2” Female NPT Carbon Steel 1.50 psi U3KCS1.50SS 900E1400107 $ 416.20 each
2-1/2” Female NPT 2-1/2” Female NPT Carbon Steel 1.50 psi U3LCS1.50SS 900E1400108 $ 606.20 each
3” Female NPT 3” Female NPT Carbon Steel 1.50 psi U3MCS1.50SS 900E1400109 $ 691.75 each
4” Female NPT 4” Female NPT Carbon Steel 1.50 psi U3NCS1.50SS 900E1400110 $ 916.45 each
3/8” Female NPT 3/8” Female NPT Carbon Steel 3.50 psi U3CCS3.50SS 900E1400121 $ 88.11 each
1/2” Female NPT 1/2” Female NPT Carbon Steel 3.50 psi U3DCS3.50SS 900E1400122 $ 106.32 each
3/4” Female NPT 3/4” Female NPT Carbon Steel 3.50 psi U3FCS3.50SS 900E1400123 $ 135.83 each
1” Female NPT 1” Female NPT Carbon Steel 3.50 psi U3HCS3.50SS 900E1400124 $ 189.60 each
1-1/4” Female NPT 1-1/4” Female NPT Carbon Steel 3.50 psi U3ICS3.50SS 900E1400125 $ 346.80 each
1-1/2” Female NPT 1-1/2” Female NPT Carbon Steel 3.50 psi U3JCS3.50SS 900E1400126 $ 358.45 each
2” Female NPT 2” Female NPT Carbon Steel 3.50 psi U3KCS3.50SS 900E1400127 $ 416.20 each
2-1/2” Female NPT 2-1/2” Female NPT Carbon Steel 3.50 psi U3LCS3.50SS 900E1400128 $ 606.20 each
3” Female NPT 3” Female NPT Carbon Steel 3.50 psi U3MCS3.50SS 900E1400129 $ 691.75 each
4” Female NPT 4” Female NPT Carbon Steel 3.50 psi U3NCS3.50SS 900E1400130 $ 916.45 each

GTC Products Inc.

Ultra Clean Chatter-Free Check Valve, Male VCR® Connections Union, Electropolished 316L VAR SS

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Male VCR union check valve 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. This valve has a springless design with all welded construction ensuring chatter-free operation.
Inlet Outlet Housing Material Cracking Pressure Mfg P/N Encole P/N Price
VCR 1/4” VCR 1/4” 316L VAR SS 3 psi CV2-MM 903E301 $ 684.00 each

Check-All Valve

316 Stainless Steel Universal Low Pressure Check Valves, Female NPT

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Stainless steel check valves in a single-piece body construction. The housing is made from 316 Stainless for better corrosion resistance than check valves in carbon steel. Connections are female NPT threads conforming to ASME B1.20.1. These valves can be used a low pressure relief valve or vacuum breaker by choosing the desired spring settings.
Inlet Outlet Housing Material Cracking Pressure Mfg P/N Encole P/N Price
3/8” Female NPT 3/8” Female NPT 316 Stainless 0.125 psi U3CSS.125SS 901E14001 $ 115.90 each
1/2” Female NPT 1/2” Female NPT 316 Stainless 0.125 psi U3DSS.125SS 901E14002 $ 128.65 each
3/4” Female NPT 3/4” Female NPT 316 Stainless 0.125 psi U3FSS.125SS 901E14003 $ 155.90 each
1” Female NPT 1” Female NPT 316 Stainless 0.125 psi U3HSS.125SS 901E14004 $ 225.30 each
1-1/4” Female NPT 1-1/4” Female NPT 316 Stainless 0.125 psi U3ISS.125SS 901E14005 $ 366.20 each
1-1/2” Female NPT 1-1/2” Female NPT 316 Stainless 0.125 psi U3JSS.125SS 901E14006 $ 375.33 each
2” Female NPT 2” Female NPT 316 Stainless 0.125 psi U3KSS.125SS 901E14007 $ 451.25 each
2-1/2” Female NPT 2-1/2” Female NPT 316 Stainless 0.125 psi U3LSS.125SS 901E14008 $ 658.80 each
3” Female NPT 3” Female NPT 316 Stainless 0.125 psi U3MSS.125SS 901E14009 $ 746.80 each
4” Female NPT 4” Female NPT 316 Stainless 0.125 psi U3NSS.125SS 901E140010 $ 976.50 each
3/8” Female NPT 3/8” Female NPT 316 Stainless 0.500 psi U3CSS.500SS 901E140021 $ 115.90 each
1/2” Female NPT 1/2” Female NPT 316 Stainless 0.500 psi U3DSS.500SS 901E140022 $ 128.65 each
3/4” Female NPT 3/4” Female NPT 316 Stainless 0.500 psi U3FSS.500SS 901E140023 $ 155.90 each
1” Female NPT 1” Female NPT 316 Stainless 0.500 psi U3HSS.500SS 901E140024 $ 225.30 each
1-1/4” Female NPT 1-1/4” Female NPT 316 Stainless 0.500 psi U3ISS.500SS 901E140025 $ 366.20 each
1-1/2” Female NPT 1-1/2” Female NPT 316 Stainless 0.500 psi U3JSS.500SS 901E140026 $ 375.33 each
2” Female NPT 2” Female NPT 316 Stainless 0.500 psi U3KSS.500SS 901E140027 $ 451.25 each
2-1/2” Female NPT 2-1/2” Female NPT 316 Stainless 0.500 psi U3LSS.500SS 901E140028 $ 658.80 each
3” Female NPT 3” Female NPT 316 Stainless 0.500 psi U3MSS.500SS 901E140029 $ 746.80 each
4” Female NPT 4” Female NPT 316 Stainless 0.500 psi U3NSS.500SS 901E140030 $ 976.50 each
3/8” Female NPT 3/8” Female NPT 316 Stainless 1.50 psi U3CSS1.50SS 901E1400101 $ 115.90 each
1/2” Female NPT 1/2” Female NPT 316 Stainless 1.50 psi U3DSS1.50SS 901E1400102 $ 128.65 each
3/4” Female NPT 3/4” Female NPT 316 Stainless 1.50 psi U3FSS1.50SS 901E1400103 $ 155.90 each
1” Female NPT 1” Female NPT 316 Stainless 1.50 psi U3HSS1.50SS 901E1400104 $ 225.30 each
1-1/4” Female NPT 1-1/4” Female NPT 316 Stainless 1.50 psi U3ISS1.50SS 901E1400105 $ 366.20 each
1-1/2” Female NPT 1-1/2” Female NPT 316 Stainless 1.50 psi U3JSS1.50SS 901E1400106 $ 375.33 each
2” Female NPT 2” Female NPT 316 Stainless 1.50 psi U3KSS1.50SS 901E1400107 $ 451.25 each
2-1/2” Female NPT 2-1/2” Female NPT 316 Stainless 1.50 psi U3LSS1.50SS 901E1400108 $ 658.80 each
3” Female NPT 3” Female NPT 316 Stainless 1.50 psi U3MSS1.50SS 901E1400109 $ 746.80 each
4” Female NPT 4” Female NPT 316 Stainless 1.50 psi U3NSS1.50SS 901E1400110 $ 976.50 each
3/8” Female NPT 3/8” Female NPT 316 Stainless 3.50 psi U3CSS3.50SS 901E1400121 $ 115.90 each
1/2” Female NPT 1/2” Female NPT 316 Stainless 3.50 psi U3DSS3.50SS 901E1400122 $ 128.65 each
3/4” Female NPT 3/4” Female NPT 316 Stainless 3.50 psi U3FSS3.50SS 901E1400123 $ 155.90 each
1” Female NPT 1” Female NPT 316 Stainless 3.50 psi U3HSS3.50SS 901E1400124 $ 225.30 each
1-1/4” Female NPT 1-1/4” Female NPT 316 Stainless 3.50 psi U3ISS3.50SS 901E1400125 $ 366.20 each
1-1/2” Female NPT 1-1/2” Female NPT 316 Stainless 3.50 psi U3JSS3.50SS 901E1400126 $ 375.33 each
2” Female NPT 2” Female NPT 316 Stainless 3.50 psi U3KSS3.50SS 901E1400127 $ 451.25 each
2-1/2” Female NPT 2-1/2” Female NPT 316 Stainless 3.50 psi U3LSS3.50SS 901E1400128 $ 658.80 each
3” Female NPT 3” Female NPT 316 Stainless 3.50 psi U3MSS3.50SS 901E1400129 $ 746.80 each
4” Female NPT 4” Female NPT 316 Stainless 3.50 psi U3NSS3.50SS 901E1400130 $ 976.50 each

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