您要查找的是不是：
- horizontal check valve 水平逆止阀
- Check valve guiding shall be plastic to plastic. 止回阀引导装置应该是塑料对塑料。
- Watts Series 709 Double Check Valve may be installed in either a vertical or horizontal position. 美国瓦茨系列709双止回阀可以安装在垂直或水平位置上。
- 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。
- Watts dual check valves may be installed in either a vertical or a horizontal position. 美国瓦茨双止回阀可以安装在垂直或水平位置上。
- Use a check valve to prevent reverse flow into the cylinder. 采用止回阀,防止回流入钢瓶。
- Globe pattern check valves should be used in horizontal pipe runs with the stem straight up. 截止阀结构的止回阀应该用于水平管道,阀杆垂直朝上。
- 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。
