Structural characteristics of stainless steel gate valve

The opening and closing part of the gate valve is a gate. The movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled.

Structural features of stainless steel gate valve :

1. Exquisite selection of materials, in line with relevant domestic and foreign standards, and high overall quality of materials.

2. It meets the requirements of advanced standards at home and abroad, with reliable sealing, excellent performance and beautiful appearance.

3. The sealing pair is advanced and reasonable. The sealing surfaces of the gate and the valve seat are made of Stellite cobalt-based hard alloys with different hardness. The sealing is reliable, high hardness, high temperature resistance, and corrosion resistance. , Good scratch resistance and long life.

4. After quenching and tempering and surface nitriding treatment, the valve stem has good corrosion resistance, abrasion resistance and abrasion resistance.

5. It adopts wedge-type elastic gate structure, middle and large diameters are equipped with thrust bearings, the friction force is small, and it is equipped with an impact hand wheel, which makes opening and closing easily.

Advantages of stainless steel gate valve

1. The fluid resistance is small, and the sealing surface is less brushed and corroded by the medium.

2. It saves effort to open and close.

3. The flow direction of the medium is not restricted, does not disturb the flow, and does not reduce the pressure.

4. The shape is simple, the length of the structure is short, the manufacturing process is good, and the scope of application is wide.

Disadvantages of stainless steel gate valve

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

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

3. The structure is more complicated.

Installation and maintenance

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 gate valve with a bypass valve should be opened before opening (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.