Piston check valves are essential for controlling fluid flow in various industrial applications. They belong to the check valve family, which permits only unidirectional flow in a system.
Like other check valves, a piston check valve has a mechanism to keep the disc in the seating position. This is usually a spring, but it could be any other mechanism that provides a force contrary to fluid flow. One key attribute of piston check valves is a guide, which prevents misalignment of the piston as it opens and closes. The following diagram highlights the basic components of a piston check valve.
Series: FC140
Size: 1/4″ to 2” (8mm to 50mm)
Material: ASTM A105, A350 LF2, A479 F316, A182 F51
Disc: (SS 304, SS316, Duplex 4A, Inconel, Monel
Port: Full & Regular (Reduced) Bore
Pressure Rating: ASME #800, #1500, #2500
End Connection: Butt Weld, NPT, BSP, SW
Construction: Bolted Cover
Operation: Self Operating
Design Standard: API 602, API 594, ASME B16.34
Pressure Testing: API 598
Face to Face: ANSI B 16.10
Butt Weld: ANSI B 16.25
Socket Weld: ANSI B 16.11
Screwed End: ANSI B 1.20.1 [ BSP / NPT ]
Quality Assurance: ISO 9001
NACE: MR 0103, MR 0175
- Gland packings can be replaced without removing the valve from the pipeline land packings can be replaced without removing the valve from the pipeline.
- Lift check valves can be used in horizontal as well as vertical pipelines.
- Utilizes a piston that moves linearly to open or close the valve. Moreover, the valve seat is either flat or conical.
- Delivers a tighter seal because of the large surface area of the piston and seat.
- Prevents backflow of oil, gas, and other fluids in pipelines, offshore platforms, and refineries.
- Prevents backflow in steam, cooling, and fuel systems to protect turbines and compressors.
- Prevents backflow in heating, ventilation, and air conditioning systems to protect pumps and valves.
- Prevents backflow of dangerous chemicals or corrosive fluids to protect the system and environment.
- Prevents contamination from backflow in processing lines to maintain hygiene and product safety.
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