1. 阀门可以配置各种操作装置，例如杠杆手柄，手动齿轮，气动执行器或电动执行器。
   The valve can be fitted with various operating devices such as lever handle, manual gear, pneumatic actuator or Electric Actuator.
2. 逆时针方向旋转开启阀门，顺时针旋转关闭阀门，可以根据需要调节或关断管道内的流体。
   By rotating the disc counter-clockwise to open or clockwise to close, the flow inside the pipeline can be regulated or shutoff - whichever is desired.

不需要定期维护。如果需要可以偶尔通过压盖法兰双头螺栓和螺栓，对阀杆填料进行调节。值得注意的是调节这些螺母螺栓时要均匀，不要过紧。否则可能导致阀杆填料过早磨损，最终导致阀门发生故障。如果阀门操作过程中，阀杆填料出现泄漏，多数情况下只需要紧固填料/压盖法兰螺栓，即可阻止泄漏。

Regular maintenance is not needed. Occasional adjustment of the stem packing may be required using the gland flange studs and bolts. It is important to adjust these nuts evenly and not to over tighten. Failure to do so could lead to premature stem packing wear and eventual valve failure. In most cases, should a stem packing leak occur during operation, the packing/gland flange bolts can be tightened to correct the leakage.

顺时针旋转压盖法兰螺母，一次一圈，直到泄漏停止为止。如果这个调节方法无法阻止泄漏，可能需要更换填料，更换填料的步骤请参阅下列的“填料更换”说明，或者可能需要采购一个新的阀门。

This is accomplished by turning the gland flange nuts clockwise one turn at a time until leakage is stopped. Should adjustment fail to correct leak, packing can be replaced as steps listed under “Packing Replacement”, or a new valve can be purchased.

建设期间残留在管道线路内的污垢和残渣可能会损坏阀座或阀瓣边缘，导致阀座故障。如果阀座出现故障，按照下列“阀座更换”所列步骤操作，排除故障。

Dirt and debris left in pipeline from construction can damage the seat or disc edge and cause seat failure. Should seat failure occur, follow the steps listed under “Seat Replacement” to correct problem.