Full copper strap wrench spring micro opening external thread safety valve A27W/A28W

本阀适用于工作温度≤200℃的水、空气、蒸气等介质的设备或管路上；本阀适用于工作温度≤200℃有腐蚀性介质的设备或管路上，作为超压保护装置。

Technical Documentation

1.execution standard：GB/T 12243-2021

2.Structural length standard：GB/T12221-2005

3.Flange Standard：GB/T9113.1-2000

4.试验标准：GB/T13927-2022

Product Parts List

Part Name	material
valve seat、valve body、valve disc、顶盘、spring盘、锁紧nut	铜合金
spring	50Cr VA
调节螺丝	A3

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