PRESSURE SEAL PISTON TYPE CHECK VALVE (Lift Check)


  • Mainly used in power plants involving fossil fuels, coal, gases, nuclear and thermal power, boilers, steam stations, etc. as valves to avoid backflow. Typically fitted downstream of a pump.
  • Designed to leverage the ability to use pipeline fluid pressure to enhance sealing action with a pre-loaded graphite or metal gasket strategically placed between the body and hood.
  • Designed in accordance with ASME B16.34.
  • ASME Classes 600, 900, 1500, and 2500


OVERVIEW

Mainly used in power plants involving fossil fuels, coal, gases, nuclear and thermal power, boilers, steam stations, etc. as valves to avoid backflow. Typically fitted downstream of a pump.

DESIGN FEATURES

PRESSURE SEAL PISTON TYPE CHECK VALVE (Lift Check)

  1. Pressure seal hood design in accordance with ASME B16.34.
  2. Spring loaded stop retaining piston disc.
  3. Inner arrangement in accordance with API-594 published tables.
  4. Renewable body-welded ring (for sizes 2 to 4 can be an integral ring).
  5. NPS 2 - NPS 30 diameters.
  1. RF or RTJ finishes in accordance with ASME B16.5 from NPS 2 to NPS 24; for NPS 26 and larger valves, ASME B16.47 Series A flanges as standard.
  2. For WE end valves in accordance with ASME B16.25.
  3. Flange end spacing in accordance with ASME B16.10.
  4. Classes 600, 900, 1500, and 2500 #.
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