Advantages and disadvantages of welded gate valve and matters needing attention in installation
Gate valve is the opening and closing parts of the gate, the direction of the movement of the gate and the direction of the fluid is vertical, the gate valve can only be fully open and fully closed, the door parameters vary, usually 5°, medium temperature is not high for 2°52 ‘. To improve its technology and make up for the deviation of sealing surface Angle in the process of processing, this kind of gate is called elastic gate. Gate valves have flange gate valves, welded gate valves, power station gate valves,

Advantages of welded gate valve:
Simple structure, manufacturing and maintenance is more convenient.
Small working stroke, short opening and closing time.
Good sealing, small friction between sealing surfaces, long life.
Disadvantages of welded gate valve:
The fluid resistance is large, and the force required for opening and closing is large.
It is not suitable for medium with granule, high viscosity and easy coking.
Poor regulation performance.
The type of welded gate valve is divided into external thread type and internal thread type according to the position of valve stem thread. According to the flow direction of the medium, there are straight-through, straight-flow and Angle. Globe valves are divided into sealing forms, including packing bellows gate valves and bellows seal globe valves.
Precautions for welding gate valves:

1. Handwheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited.
2, double disc gate valve should be installed vertically (that is, stem in vertical position, handwheel at the top).
3, the gate valve with bypass valve should be opened before opening the bypass valve (to balance the inlet and outlet pressure difference and reduce the opening force).
4. The gate valve with transmission mechanism shall be installed according to the instructions of the product.
5, if the valve is often used, at least once a month lubrication

Nortech is one of the leading industrial valve manufacturers in China with quality certification ISO9001.

Major products: Butterfly Valve, Ball Valve,Gate Valve, Check Valve, Globe Vavlve,Y-Strainers, Electric Acurator , Pneumatic Acurators .