Why Does It Take Half a Turn to Close Or Open the Gate Valve?

Basic structure of gate valve

The gate valve is a kind of valve that relies on the lifting and lowering of the gate to cut off the slurry. It has the advantages of simple structure, wear resistance, good sealing, and easy operation. Its basic structure includes valve body, gate, packing, movable bearing and manual device.

Why does the gate valve need to return half a turn?

1. The closing and opening of the gate valve require the movement of the gate, and the opening or closing of the gate requires a certain angle of rotation. The half turn is to ensure the sealing and stability of the valve.

2. At the same time, steel materials have a certain degree of elasticity. The half-turn return is to prevent exceeding the elastic deformation range and causing damage to the screw rod.

The function of half circle

1. Ensure the normal opening and closing of the valve. Because the gate plate of the gate valve needs to rotate at a specific angle to complete opening and closing, half a turn is just the best angle to achieve this purpose.

2. Ensure the sealing of the valve. The valve sealing surface is in close contact with the valve seat sealing surface, and a half turn can ensure full contact between the sealing surfaces to achieve valve sealing.

3. Avoid damage to the valve. If you do not turn back half a turn when opening or closing the gate valve, the gate may become stuck or damaged, thus affecting the normal service life of the valve.

The gate valve is a common valve. The purpose of turning it back half a turn is to ensure its normal opening and closing, thereby improving the sealing and stability of the valve. At the same time, because the steel material has a certain elastic deformation, by turning it half a turn, it can Avoid valve damage. When using the gate valve, you should pay attention to its sealing performance and rotation angle. If there is any problem, it should be repaired or replaced in time.