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- This type of strainer is usually installed upstream of most of the devices in the system including the meters, backflow preventers (or detector check valves) and flow alarms, in order to protect these devices from damage caused by large particles. 这种类型的过滤器通常安装在系统内大多数设施的上游，包括仪表，防回流阀（或检测止回阀）和水流警报装置等，从而保护这些设施不会被大颗粒损坏。
- detector check valve 探测器止回阀
- detector check valve meter 探测器止回阀的水表
- Check valve guiding shall be plastic to plastic. 止回阀引导装置应该是塑料对塑料。
- Remove check valve and valve seal from booster. 从倍力器上卸去逆止阀和阀门密封。
- Connect vacuum hose to booster check valve. 连接真空软管到增压器检测阀。
- To test for tightness of second check Valve. 检测第二止回阀的密封性。
- ANSI FLANGED SWING CHECK VALVE CLAS. 美标法兰止回阀。
- Reassemble the Check valve modules. 重新组装止回阀模块。
- Connect vacuum hose to booster check valve . 连接真空软管到增压器检测阀。
- Purpose: To test check valve No. 1 for tightness. 目的:检测止回阀1号的密封性。
- Sticky outlet check valve poppet. 1检查过滤的进水管线。
- CAUTION: The check valve spring is in compression. 警告：止回阀弹簧处于压缩状态。
- Remove the four screws holding the first check valve cover. 拆卸固定第一止回阀阀盖的四个螺丝。
- A check valve may be required ahead of the backflow preventer. 此时在防回流阀前面可能需要安装一个止回阀。
- Service the second check valve using steps 2 through 12. 按照第2步至第12步维修第二止回阀。
- Use a check valve to prevent reverse flow into the cylinder. 采用止回阀,防止回流入钢瓶。
- Check valve seats are replaceable without the use of special tools. 止回阀阀座可更换，不需要采用特殊工具。
- Velan Small Forged Steel Check Valves. 锻造低温闸阀、截止阀和止回阀。
- FORGED STEEL PISTON CHECK VALVES. 锻钢活塞止回阀用于水平和垂直管道。
