阀座/磨损环
Seat/Wear Ring

　　阀座和磨损环采用钨铬钴硬合金作为硬化表面，碳化铬或碳化钨焊接在内径和阀座表面上。也可以选择弹性阀座，并与金属阀座一起实现气密性关闭效果。磨损环用来最大限度缩小与闸板的间隙，以承受完全的额定压力。阀座和磨损环都是可更换的。
　　Seat and wear ring are hard faced with Stellite® #6, chrome carbide or tungsten carbide weld on the ID and seating surface. An optional resilient seat in conjunction with the metal seat achieves bubble-tight shutoff. The wear ring is set for minimum clearance from gate for full rated back pressure. The seat and wear ring are both replaceable.

附件
Accessories

　　锁定装置：
　　Lockouts:
　　美国国家标准化组织ANSI Class 150压力等级和550 CWP压力等级
　　ANSI Class 150 and 550 CWP
　　所有阀门都配置开启和关闭锁定装置。这种锁定装置与执行器全面匹配，能够在锁定状态下与执行器一起拆卸。
　　All valves are furnished with open and closed lockouts. The lockouts are full actuator rated and allow actuator removal while it is in the locked position.
　　美国国家标准化组织ANSI Class 300压力等级
　　ANSI Class 300
　　所有阀门都配置开启和关闭专利锁定装置。这种锁定装置与执行器全面匹配，能够在锁定状态下与执行器一起拆卸。
　　All valves are furnished with open and closed patented lockouts. The lockouts are full actuator rated and allow actuator removal while in the locked position.

　　净化清洗装置：
　　Purges:
　　所有阀门在阀腔或上部阀盖区域都有两个净化清洗装置。
　　All valves have two purges in the valve chest or upper bonnet area.

　　螺栓：
　　Bolting:
　　所有螺栓等级均在5级以上。
　　All bolting is Grade 5 or better.