Seat, the O-ring cannot be replaced. A new seat ring, including a crimped in O-ring can easily be put back into place and secured there by tack welding the retainers.

• 换。新式阀座密封环,包括O形环内的波纹可以轻松的放置到原有的位置,通过对固定环进行点焊来确保安全紧固。