~Proportional Relief Valves (RV series) features:
1. Set pressure: 3.4 to 414 bar @ 21°C (50 to 6000 psig @ 70°F).
2. Max outlet pressure: 103 bar (1500 psig).
3. Working temperature: -23°C to 148°C (-10°F to 300°F).
4. Various end connections.
5. Application to gas or liquid.
6. Adjustable bonnet and adjustable cracking pressure.
7. Balance stem design eliminates the effect of back pressure on cracking pressure.
8. 7 color-code springs available for wider range of cracking pressure.
9. Lock wire hole can maintain the set pressure effectively.
10. Various sealing materials are available.
11. Label indicates the range of cracking pressure.
12. Manual override handle available to open the valve    when the pressure is lower 1500 psig.
13. The handle can open the valve but not change the cracking pressure.
14. Every valve is 100% factory tested with nitrogen for leak-tight performance at its maximum pressure.