How to judge whether the manual butterfly valve is open or closed?

Manual butterfly valve has two operating modes, one is handle operation, also called handle butterfly valve; the other is worm gear driven, also called worm gear butterfly valve.

Question: The manual butterfly valve has been installed on the pipeline, and it is not clear whether it is open or closed. How to judge whether the manual butterfly valve is open or closed?

Answer:Manual butterfly valve has two operating modes, one is handle operation, also called handle butterfly valve; the other is worm gear driven, also called worm gear butterfly valve.

The method of opening or closing the handle butterfly valve is very simple. Look at the position of the handle. The handle is perpendicular to the pipe, which means it is closed. If the handle is parallel to the pipe, the butterfly valve is now open.

The worm gear butterfly valve will turn the handwheel to control the valve switch. We cannot judge whether the butterfly valve is open or closed through the handwheel. However, there will be a dial and a pointer on the top of the worm gear box, which can clearly tell you what state the butterfly valve is in, that is, open or closed, half open and half closed.

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