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Bearing material

Bearing material

Bearing material

(OP)
Hi,

Currently designing a trunnion mounted ball valve for use on seawater.  The trunnion locates in a blind hole in the bottom of the ball and is normally sleeved with a nylon bush.  Due to the fact that this valve needs to be of a "fire safe" design (client is insistent on it!), i'm looking for an alternative bearing material that won't perish at 500 deg C +.  The ball and trunnion are both aluminium bronze B148 C95800.

Thanks in advance.

Graham

RE: Bearing material

if sleeved with nylon, the seal will no hold at 500 c.

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