碳钢，合金钢或不锈钢，压力密封或螺栓阀帽用于焊接在螺栓阀帽阀门上阀座的设备。

Carbon, Alloy or Stainless Steel, Pressure seal or Bolted Bonnet Provision for seal Welding on Bolted Bonnet Valves.

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阀座环较长，并且是密封焊接的，能够补偿温度波动。阀座面用钨铬钴合金6硬化， 研磨和层叠为镜面光洁度。

Seat rings are long to compensate for temperature fluctuations and are seal - welded. seating faces are hardfaced with stellite 6, ground and lapped to mirror finish.

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阀座环通过密封焊接，消除泄漏通道。

Remove the pressed in relief valve seat and seat O-ring.

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