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Check Valve API 602


API 602

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API 602 Check Valve Standard

Forged Steel Check Valve
API 602

This international standard specifies the requirements for a series of compact steel gate, globe and check valves for petroleum and natural gas industry applications. Check valves, also known as nonreturn valves, are automatic valves which open with forward flow and close against reverse flow.

Check valves are unique in that they do not require an outside power supply or a signal to operate, and therefore they can be used in lines to feed a secondary system in which the pressure can rise above that of the primary system, and shutoff with speed or gradualness, depending on the specific design of the valve.

Check Valve Pressure Rating
  • Check Valve API 602 Class 150
  • Check Valve API 602 Class 300
  • Check Valve API 602 Class 600
  • Check Valve API 602 Class 800
  • Check Valve API 602 Class 1500
Check Valve API 602 Features
  • Standard trim is stellite faced seat integral to the body and 13% chrome disc/ball.
  • Seat faces lapped for smooth finish and superior sealing.
  • Wall thickness per heavy wall API 602 requirements.
  • Check valve are suitable for service in horizontal line with cap vertical.
  • Piston Check Valve, Swing Check Valve and Y-Patttern Piston Check Valve
Wall Thickness API 602
Pressure-temperature ASME B16.34
General Valve Design API 602 & B16.34
Flange Design ASME B16.5
Thread Design ASME B1.20.1
Butt Weld Design ASME B16.25
Materials ASTM
Outside Screw with Rising Stem (OS&Y)
Inside Screw with Rising Stem (ISRS)
Socket Weld or Threaded Ends
Flanged or Butt-welding Ends
Extended Body
Bellow Stem Seal
Standard and Full-bore Body Seat Openings
Body Materials A105, A 182 F11, A 182 F22, A 182-F304, A 182-F316
Disc 13Cr, A 182-F304+STL, A 182-F316+STL, A276 T420, A276 T316
Gasket SS304 & Graphite, SS316 & Graphite, Spiral Wound SST with Graphite and PTFE
Cap A 105, A 182-F304, A 182-F316,A 182 F11, A 182 F22, A 182 F316
Cap Bolt A 193-B7, A 193 B-8, A 193 Gr.B7, A 193 Gr.B16, A 193 Gr.B8M
Carrier 304 SST, 316 SST
Carrier Pin 304 SST, 316 SST