Are valves with bellows seal packing necessary for substances with high toxicity or above?
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This post was last edited by Desert Fish on 2021-10-28 at 14:18. Are valves with bellows seal packing necessary when dealing with substances with high toxicity? Manual valves and straight-stroke pneumatic valves are not a problem, but what about cut-off ball valves? They are all of angular stroke type; replacing them with linear stroke cut-off valves would result in excessive cost increases. Is there any standard stating that cut-off valves meeting GB/T4213 standards can be used with highly toxic media? The expert asked for bellows; I was a bit confused
Because bellows sealing is the safest; all other types of sealing carry a risk of leakage. Who would dare say no to safety?
It’s right to follow the experts’ advice; otherwise, the final inspection might not be successful
Is this expert an expert in brick pulling?
Improving the safety of design and selection is one of the effective guarantees for meeting regulatory requirements and ensuring long-term stable operation.
They are all of angular stroke type; replacing them with linear-stroke shut-off valves would result in too high costs. Safety must be ensured first, with cost being a consideration secondly – especially for designers
The cost of any accident is several times the amount saved by putting effort into this aspect