1.
hoist cylinder oil relief valve
起重机油缸油压安全阀
2.
discharge from safety and relief valves
由安全阀和泄压阀泄放
3.
Remove the relief valve cover bolts while holding the cover down.
边压住阀盖，边拆卸安全阀阀盖螺栓。
4.
press safety interlock valve
压力机用安全联锁阀
5.
A pressure differential relief valve is located in a zone between the check valves.
压差安全阀位于止回阀之间的区内。
6.
No relief valve is required where two pressure reducing valves are installed.