Category Archives for Type Of Devices

Pressure Relief – Rupture Discs

These are thin diaphragms held between flanges and calibrated to burst at a specified static inlet pressure. Unlike relief valves, rapture discs cannot reseal when the pressure declines. Once the disc ruptures, any flow into the vessel will exit through … Continue reading

25. September 2009 by Jack
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Pressure Relief – Pilot-Operated Relief Valves

Pilot-operated relief valves use the pressure in the vessel rather than a spring to seal the valve and a pilot to activate the mechanism. Figure 13-6 is a schematic of a typical pilot-operated valve. A piece of tubing communicates pressure … Continue reading

25. September 2009 by Jack
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Pressure Relief – Balanced-Bellows Relief Valves

Balanced relief valves are spring-loaded valves that contain a bellows arrangement to keep back-pressure from affecting the set point. Figure 13-4 shows a cross section of a balanced relief valve, and Figure 13-5 is a schematic that shows how the … Continue reading

25. September 2009 by Jack
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Pressure Relief – Conventional Relief Valves

Figure 13-2 shows a cross section of a conventional relief valve and Figure 13-3 is a schematic that shows the valve’s operation. Convention al relief valves can be used anywhere that back-pressure in the relief header is low. They are … Continue reading

25. September 2009 by Jack
Categories: Type Of Devices | Tags: | Leave a comment