Lift check valves on the valve seat is located in the valve body sealing surface.

升降式止回閥的閥瓣座落位于閥體上閥座密封面上一级黄片二级黄。

The first check valve has a heavy weight spring.

第一止回閥配置較重的彈簧亚洲专区亚洲播放区在线视频。

CAUTION: The check valve disc and spring assembly are in compression.

警告：止回閥閥瓣和彈簧總成是壓縮在一起的。

The second check valve has a lighter weight spring.

第二止回閥則配置較輕的彈簧免费国产牲交视频在线播放。

Piston-type check valve assembly with a plate to control the activities of the piston.

活塞式止回閥裝配有一塊孔板來控制活塞的活動(dòng)igao视频为爱搞激情。

Swing check valves should be used one kind of screws or bolts to connect the valve cap for inspection and repair of disc and seat.

旋啟式止回閥應(yīng)該選用一種螺絲或螺栓連接的閥帽，以便檢查和修理閥瓣和閥座国产一级精品A片观看视频。

Gravity ball check valves are converted to foot valves by replacing the union nut and end connector on the receiving end – seat end – of the body with an F.V.

重力球形止回閥可以變?yōu)榈组y黄色迷晕网站，只需在接受端口-閥體的閥座端口，用一個(gè)F.V久久五月天婷婷综合。

A check valve should be installed on return piping if there will be a pressurized return line or the trap drains to an overhead return line Fig.

如果存在一個(gè)壓力回路乱伦图片综合网，或者疏水閥排放口位于回路管道的上方，則應(yīng)該安裝一個(gè)止回閥国产亚洲一二三。

The check valves shall utilize a single torsion spring design to minimize pressure drop through the assembly.

這種止回閥應(yīng)該采用單扭力彈簧結(jié)構(gòu)來將通過總成的壓降減到最小程度国产情侣第一页。

The check valve shall utilize a single torsion spring design to minimize pressure drop through the assembly.

止回閥應(yīng)該采用單個(gè)扭力彈簧結(jié)構(gòu)以減少通過總成的壓降。