Powerchokes - Pressure relief valves
Valve body is of forged construction, API 75K material and impact-tested. It is virtually maintenance free with high erosion resistance/ extended trim life. The control system is ATEX certified with a significantly faster response time and unparalleled reliability. The system provides much needed redundancy, data logging and enhanced safety features.

Link:
http://exprogroup.com/products-and-services/powerchokes/pressure-relief-valves/

Your contact:
E: chance.knight@exprogroup.com