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.
温度在摄氏三十度与四十度之间上下波动。
The temperature ranges between 30 and 40 degrees centigrade.
温度在摄氏三十度与四十度之间上下波动。
The temperature ranges between 30 and 40 degrees centigrade.
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