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butterfly valve

thread408-66630

butterfly valve

butterfly valve

(OP)
What's different between centre butterfly valve with pin and without pin?
Replies continue below

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RE: butterfly valve

You must be referring to the difference between single pice and two pices discs/shafts. With two piece, the shaft runs through the disc and is pinned together with a screw. This allows for replacing disc and re-using shafts. Single piece, however, are safer for blow out prevention if no undercut is allowed in the shaft bores.

RE: butterfly valve

(OP)
Hi joeswoes,
Thanks very much for your answer, yes pinned is with a screw to fix the disc on shaft, pinless is the shaft runs through disc, but what's different between them in advantage and disadvantage? Thanks.

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