SKU: PCS

Stainless Steel Piston Check Valve

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The PCS series of check valves is a 316 Stainless Steel Piston style check valve with a PTFE seat and BSP threaded end connections. The spring backed piston allows for this check valve to be mounted in any direction and features a low cracking pressure of a few kPa (depending on the size). The PTFE seat is rated to 180°C for intermittent use, prolonged use at this temperature is not recommended. At low temperatures the hard PTFE seat will also in some cases have seepage past the seat. Rated to a media pressure of 40 Bar, refer to below pressure temperature chart for operating pressures.

Model Size DN (mm) Media Pressure Media Temperature Cracking Pressure (kPa)
PCS-04 ½” 15 0 to 40 BAR 0°C to 180°C 4
PCS-05 ¾” 20 0 to 40 BAR 0°C to 180°C 3.7
PCS-06 1” 25 0 to 40 BAR 0°C to 180°C 3.5
PCS-07 1 ¼” 32 0 to 40 BAR 0°C to 180°C 3
PCS-08 1 ½” 40 0 to 40 BAR 0°C to 180°C 2.8
PCS-09 2” 50 0 to 40 BAR 0°C to 180°C 2.5

 Stainless Steel Piston Check Valve Temperature vs Pressure

Stainless Steel Piston Check Valve

Model Size A B C
PCS-04 ½” 65 46 19
PCS-05 ¾” 80 58 23
PCS-06 1” 90 69 27
PCS-07 1 ¼” 105 75 32
PCS-08 1 ½” 120 85 41
PCS-09 2” 140 98 50

All dimensions in mm unless shown otherwise. 

Stainless Steel Piston Check Valve

Number Name Material
1 Body ASTM A351 CF8M
2 Nut SS304
3 Spring Washer SS304
4 Washer SS304
5 Seat Ring PTFE
6 Plug SS316
7 Spring SS304
8 Gasket Packing PTFE
9 Cap ASTM A351 CF8M

Size 1/2" to 2" BSP
Body 316 Stainless Steel
Seat PTFE
Pressure Range 0 to 40 BAR
Temperature 0 to 180°C

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