Selection requirements for valve covers of toxic medium control valves
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When the medium contains CO gas, is it necessary to use a bellows seal for the control valve?
Toxic gases definitely require bellows; otherwise, they will leak! QQ: 928976489 (Your control valve consultant)
CO does not necessarily need to be sealed with a bellows.
It’s not necessary to use a bellows for sealing, but it’s better to do so – it’s better to be prepared! Also, CO is not only toxic but it can also explode! Remember to also be prepared for violence! !
As required by the design institute, it must be explosion-proof. It is recommended to use a bellows seal.
I think it's necessary. Otherwise, if a leak occurs, the consequences can be severe.......
Not necessarily; if the owner doesn’t make a request, generally only double-layer packing will be considered, or the supplier may be asked to meet some European environmental standard. Fisher has something called the Envir Package, I think