Opening And Closing Sequence of Gate Valve

What is a gate valve? Gate valves are a type of shut-off valve. Shut-off valves include gate valves, globe valves, ball valves and butterfly valves. Gate valves are common flow control devices, suitable for occasions with small leakage and frequent opening and closing. They are widely used in construction, water conservancy, sanitation, fire protection and other fields. It is a device for controlling the flow and pressure of various pipeline media. So how should the gate valve be opened and closed? What are the matters that need to be paid attention to?

Gate Valve Opening And Closing Sequence

1. Handwheel opening and closing gate valve: Handwheel opening and closing gate valve is the most common operation method. The following points should be noted when opening and closing: First, adjust the handwheel to a horizontal position, and then rotate the handwheel counterclockwise until the valve is fully opened. When closing the gate valve, you need to rotate the handwheel clockwise until the gate valve is fully closed.

2. Gear opening and closing gate valve: Gear opening and closing gate valves are more flexible than handwheel opening and closing gate valves, but the following points should be noted during operation: First, rotate the gear so that it becomes a whole with the handwheel or gear on the contact surface. Then, rotate the gear in a counterclockwise direction until the valve is fully open. When closing the gate valve, you need to rotate the gear clockwise until the gate valve is fully closed.

Details And Precautions

1. The valve needs to be operated slowly during opening and closing to avoid sudden acceleration or deceleration.

2. When operating the gate valve, the handwheel or gear needs to be kept clean and undamaged, and no heavy objects are allowed to be hung on it.

3. When opening the gate valve, the pressure difference needs to be gradually reduced to avoid water hammer.

4. After the gate valve is closed, the valve needs to be sealed to ensure good sealing.

5. The gate valve needs to be lubricated and maintained regularly to ensure long-term use.

Summary

A detailed understanding of the basic opening sequence and precautions of the gate valve will help to better operate the gate valve and ensure the safe operation of the pipeline. In the process of using the gate valve, you need to pay attention to details and operating points to ensure the service life and normal operation of the valve. When purchasing, you also need to ask the valve supplier about the matters that need to be paid attention to to avoid losses caused by operating errors.