Gate Valves
Introduction:
The gate valve controls the opening and closing of the valve through the lifting and lowering of the gate. The gate is perpendicular to the direction of the fluid, and the size of the channel can be changed by changing the relative position between the gate and the valve seat.
According to the different movement of the valve stem when the gate valve is opened and closed, the gate valve is divided into two types: rising type and non-rising type.
The stem thread of the rising stem gate valve is exposed outside the valve body. When the valve is opened, the stem extends out of the handwheel. Affected by medium corrosion, the disadvantage is that the height of the overhang space is large.
The stem thread of the concealed stem gate valve is to be matched with the inner thread of the gate plate inside the valve stem. When the valve is opened, the valve stem only rotates without lifting up and down, and the gate plate rises along the valve stem thread.
The advantage of the concealed stem gate valve is that the extension space is small, and the disadvantage is that the opening of the valve cannot be judged according to the condition of the valve stem, and the thread of the valve stem is easily corroded in contact with the medium for a long time.
Advantages:
The gate valve has the advantages of small fluid resistance, constant medium flow direction, slow opening, no water hammer phenomenon, and easy flow adjustment.
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