Sour Service Check Valves

O-Ring, Ball and Excess Flow Check Valves to 30,000 psi (2068 bar)


Since 1945 Parker Autoclave Engineers has designed and built premium quality valves, fittings and tubing. Parker Autoclave Engineers high-pressure SOG check valves are capable of operating to 30,000 psi (2068 bar) and range in size from 1/4" to 9/16" tube size. Check valves available in O-ring, ball and ball type excess flow designs.


  • Tubing sizes are 1/4", 3/8" and 9/16".

  • Coned-and-threaded connection

  • O-ring and ball check valves

  • Ball type excess flow valves

  • Special material available.


Parker Autoclave Engineers high-pressure check valves are used as fluid handling components in oil and gas industries where H2S is present. Parker Autoclave Engineers type SOG Components are available with standard API Test and gauge connections (Parker Autoclave Engineers F562C). These components provide dependable performance in gas and liquid applications.

Sour Service Check Valves