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Posted by Gern Blanston on April 30, 2002 at 18:52:55:
Safety valve manufacturers and boiler insurers typically recommend testing relief valves with the lifting lever about every two months.
I typically find operators of 150 psi steam boilers who do NOT test lift the relief valve EVER because they say that doing so causes the valve to start leaking. There seems to be a perception that testing the valves does more harm than good.
Are relief valves on water boilers more or less susceptible to leaking due to test lifting than steam?
What's the recommended frequency and method to test the valves so that they won't begin to leak?
Thanks.