Circle Valve Technologies offers pressure relief valves in the following configurations: R6000 Series, 5300 Series, D500 Series ASME safety, 5100 Series, and 500 Series. 5300 Series relief valves can handle cracking pressures ranging from 10 to 10500 PSIG and operating temperatures ranging from -20 to 350°F. These valves come in a brass/303 stainless steel construction, valve sizes ranging from 1/4" to 1/2", female pipe end connections, and a zero leakage design. Circle Valve also supplies HP500 Series and M5100 Series ASME pressure relief valves.

HiP manufactures ultra-high pressure valves, high pressure valves, medium pressure valves, and pressure valve fittings/tubing. These valves feature maximum pressures ranging from 20,000 to 150,000 PSI.

Neptune manufactures field adjustable back pressure valves that can handle pressures up to 50 PSI. These valves are used when the injection point is below tank level or in environments where the bulk tank has high head pressure ratings.

Ives Equipment Corp. offers pressure valves in pressure regulator and high-pressure metal seated ball configurations.