Control supply line water pressure. install a soft seated spring loaded check valve upstream of the assembly.
控制供应管道的水压。在总成的上游安装一个软阀座,弹簧负载止回阀。
2
At this point the upper stem has lost contact with the diaphragms. The valve should be opened to this point but not back seated.
在此时,上阀杆已经失去了同横膈膜的接触。阀门应该开启到这一点,但不能反向固定。
3
The products are included metal seated Vulcan Power Valve, General Severe Service Series metal and ceramic seated Ball Valves and Signature Series metal and ceramic seated Ball Valves.