What Is a Drain Valve?

Drain valve is an indispensable water industry product. It is mainly used in urban, construction, enterprise water supply and drainage engineering, industrial and domestic sewage treatment and water conservancy engineering. Among them, the most commonly used are various low and medium pressure valves, including Various types of butterfly valves and gate valves include ball valves, check valves, exhaust valves, plug valves, diaphragm valves, pressure reducing valves, flow regulating valves, and sludge valves. Mainly used for liquid discharge or level control.

Drain valve is a widely used valve in the water industry. Sewage and liquid discharge must pass through the drain valve. There are many types of drain valves, which can be divided into automatic, power driven and manual according to the power mode. They can be divided into stop valves, check valves, ball valves, traps, etc. according to their purpose and function. Different valves are suitable for different scenarios.

Drain valve is often used in domestic water supply, fire protection system and industry

The main problems with current drainage valves are:

1) The spheroidization rate of the shell material is low, and the elongation is insufficient.

2) The painting is not standardized, and the reverse sealing performance of the butterfly valve is poor.

3) The gear box leaks and rusts, and the swing check valve is prone to accidents, and the head loss is large.

4) Slow-closing oil cylinder leaks out of control.

5) Although there are many types of valves for waterproof hammers, the reliability is insufficient, and the technology of flow regulating and pressure regulating valves has not been fully grasped, and so on, it needs to be improved.

The overall requirements of the valve are to optimize the five major performances, namely: sealing performance, strength performance, adjustment performance, operating performance and circulation performance; at the same time, it needs to have five aspects: simple structure, energy saving, convenient maintenance, sanitary water quality and long corrosion life pursue.

As mentioned above, according to incomplete statistics, the annual total output value of the valve is 80 billion to 100 billion yuan. Product varieties have reached more than 3,000 models and nearly 30,000 specifications. In terms of variety and quantity, it basically meets the needs of water supply companies. In terms of quality, although there has been considerable progress in recent years, there is still a large gap compared with products from industrially developed countries. It is difficult to distinguish between true and false. Some valve products can not meet the high-quality requirements of water supply companies, while some water supply companies also have certain management problems, resulting in the technical level of China's water supply industry needs to be further improved. ^[1]