Non-rising stem gate valve operating principle

According to the type of stem can be divided into open stem gate valve and non-stem gate valve. The valve stem is the operating part of the gate valve and its function is to transfer the opening and closing force to the opening and closing part.

According to the type of stem can be divided into open stem gate valve and non-stem gate valve. The valve stem is the operating part of the gate valve and its function is to transfer the opening and closing force to the opening and closing part.

Non-rising stem gate valve is also called rotating stem gate valve, also known as non-rising stem wedge gate valve. The stem nut is placed inside the valve body, in direct contact with the medium, and is often fixed on the gate. The stem nut drives the disc up and down through the stem rotation to complete the opening and closing. There is usually a trapezoidal thread at the bottom of the stem. It cannot be lubricated through the thread at the lower end of the valve. The opening degree cannot be directly observed.However, the stem can not do lifting movement, the need for small operating space, it is suitable for limited position of the pipeline dense occasions.

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