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Safety Valve Spring Length

Safety Valve Spring Length

Safety Valve Spring Length

(OP)
Hi all

I am from Malaysia. Malaysia does not have own boiler code, we basically borrowed from BS Code. In one of the code about safety valve spring, it states that the length of the spring should be less than 4 X OD of the spring.

Anyone of you has the answer just to why they have such specification?

Thanks

Aida Hanani

RE: Safety Valve Spring Length

It would have to do with the elastic behavior characteristics of the spring in service.

RE: Safety Valve Spring Length

It is to avoid buckling of the spring sideways and rub on the housing wall.

RE: Safety Valve Spring Length

If the height of compression spring is more than 4 times the spring OD, the spring could buckle sideways.

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