Volume Relief Valves

Some articles on volume relief, volume relief valves:

Gas Holder - Dry-seal Wiggins Type Gasholder - Main Elements - Main Tank
... Volume relief pipes Essential fail-safe system to protect the gasholder from over-pressurisation ... Once actuated, by the piston fender, the volume relief valves allow the stored gas to escape to atmosphere at a safe height above the gasholder roof ... As the volume relief valves open they actuate a limit switch ...

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