In-depth analysis of the advantages and disadvantages of gas gate valves

The bottom of the valve body of the gas gate valve is provided with a slag discharge hole to facilitate the removal of dirt. The medium channel inside the valve body is straight, and the medium does not change its flow direction when it flows through the gate valve, so the flow resistance is small. The medium can flow in any direction from both sides of the gate valve, and both can achieve the purpose of switching on or off.

The application and selection principle of gas gate valve and wedge gate valve

   The gas gate valves are all rising stem gate valves. The valve stem drives the gate up and down together. The transmission thread on the valve stem is outside the valve body. Therefore, the opening and closing and position of the gate can be intuitively judged according to the movement direction and position of the valve stem, and the transmission The thread is easy to lubricate and is not corroded by the fluid, but it requires a larger installation space.

   Precautions for the working principle of gas gate valve

   1. Handwheels, handles and transmission mechanisms are not allowed to be used for lifting, and collisions are strictly prohibited.

   2. The double gate valve should be installed vertically (that is, the valve stem is in the vertical position and the handwheel is on the top).

   3. The bypass valve should be opened before the gas gate valve is opened (to balance the pressure difference between the inlet and outlet and reduce the opening force)

   4. The gate valve with transmission mechanism should be installed according to the product manual.

   5. If the valve is frequently opened and closed, lubricate at least once a month.

DZ41H type low temperature steel gate valve

     Disadvantages of gas gate valve

     1. It is easy to cause erosion and scratches between the sealing surfaces, and it is difficult to maintain.

     2. The overall size is large, opening requires a certain amount of space, and the opening and closing time is long.

     3. The structure is more complicated.