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1·The level of valve lift check valve should be installed in horizontal pipelines.

升降式水平瓣止回阀应安装在水平管道上。

2·Lift check valve with a spring load can withstand light valve flap, flap valve lift is not high.

升降式止回阀使用一个可承受弹簧载荷的轻量阀瓣，阀瓣的升程不高。

3·Check them Safety Valves belonging to this type of valve, which includes Swing check valve and lift check valve.

其中止回阀就属于这种类型的阀门，它包括旋启式止回阀和升降式止回阀。

4·The in-line spring-actuated lift check also is referred to as the silent check because the spring closes the valve before gravity and fluid reversal can slam the valve closed.

由于这种止回阀能够在重力和介质倒流撞击启闭件之前关闭阀门，因此这种直通弹簧驱动升降式止回阀也称为“静音”止回阀。

5·Using an appropriate sized wrench, loosen the check valve cover. Unscrew the check valve cover and lift it off.

采用尺寸大小适中的扳手松开止回阀阀盖。宁松止回阀阀盖并将其取出来。

6·Installations with suction lift require a good quality foot valve to avoid loss of prime - remove in-built check valve.

进水口的安装需要使用一个品质优良的底阀，以避免进水口压力损失- 拆除内置式止回阀。

7·Using an appropriate sized wrench, loosen the check valve cover. Unscrew the check valve cover and lift off.

采用大小适中的扳手，松开止回阀盖。旋下止回阀盖螺丝并拿起。

8·Ortherwise, the eccentric gas anchor, gas lift valve and surface check valve are installed to automatically unload the gas from the deeper layer and annulus between the tubing and the casing.

大气量时应用偏心气锚安装气举阀与地面单流阀两步卸气，实现了下部产层和油套环空自动卸气。