When Using A High Pressure Ball Valve Under High Pressure Conditions, You Must Understand Its Characteristics

1 Piece Threaded Ball Valve is different from ordinary valves in that its opening and closing parts are designed as spheres, which are driven by the valve stem to rotate around the axis of the sealing surface to adjust the fluid. It is a very important fluid control part device. The following is a detailed introduction to the high-pressure ball valve.

1. Application field

As one of the basic pipeline fluid control parts, the application field of high-pressure ball valve is very wide, but at the same time, compared with other valve types, it has its own unique characteristics. The high-pressure ball valve works by rotating the opening and closing parts. Its main function is to connect or cut off the fluid. It can also be used to regulate and control the fluid, while the high-pressure gate valve works by lifting and lowering.

Another feature of the high-pressure ball valve is that the internal valve core and the valve seat made of cemented carbide can generate a large shear force, so it is most suitable not only for connecting and cutting off fluids, liquids, and natural gas, but also for fluid media containing tiny solid particles and fine fibers. If it is a high-pressure ball valve with a multi-pass design, it can also more flexibly control the diversion, confluence and switching of the fluid medium.

2. Advantages of use

Compared with high-pressure gate valves, high-pressure ball valves can withstand very small fluid pressures, and full-diameter ones do not even have any fluid resistance. And the scope of application is very wide, and it can be used under both high pressure and high vacuum conditions.

Because of the high shear force between the ball core and the valve seat, the high-pressure ball valve is very suitable for controlling and regulating fluid media containing solid suspended particles. When fully open and fully open, it is separated from the medium, so it will not be corroded by the medium.

After the high-pressure ball valve has been used for a long time, it is inevitable that the valve will be corroded. If the valve is corroded, we may need to replace it with a new product. For the valve, which is the most susceptible to corrosion, what preventive measures do we need to take? Prevent valve corrosion, use it for a longer time, and reduce the cost of using our products. So, how to avoid the corrosion of the valve of the high-pressure ball valve?

1. Treat the metal surface

The valve of the high-pressure ball valve is metal and is easily corroded, but if we treat the metal surface of the valve, the corrosion resistance of the valve can be improved. There are many ways to improve corrosion resistance, such as using nitriding or boriding waterproofing for surface treatment.

2. Use appropriate corrosion-resistant materials according to the corrosive medium

In the production process, medium corrosion is relatively complicated. Even if the same medium is used, different valve materials are used. The influence of factors such as medium concentration and temperature will also lead to different material corrosion. Specifically, we need to make corresponding adjustments according to the valve materials we use, understand various corrosion causes, and deal with them in a targeted manner.

3. Spraying paint

This is the most commonly used anti-corrosion measure, especially anti-corrosion paint is often used in valve products. Generally, anti-corrosion paint is configured using synthetic resins, vegetable oils or solvents. When this paint is used to cover the metal surface, it can isolate the medium and the atmosphere, and can achieve a good anti-corrosion effect.

In addition to the anti-corrosion measures for high-pressure ball valves introduced above, thermal spraying, electrochemical protection, and the addition of corrosion inhibitors can also be used to extend the time the product is corroded. During use, users should check regularly so that they can find product problems in time and deal with them in time.

Every time I hear others say that the use range of high-pressure ball valves is very wide, but to specifically talk about the industry where high-pressure ball valves are used, some people may not know much about it. In fact, it can be used in various industries such as petroleum, chemical industry or thermal power station, and it is applicable to many media, which has a lot to do with its characteristics.

1. Prevent the expansion of fire

Some users may have doubts about this. In fact, when a fire occurs, the high-pressure ball valve will cause the valve seat seal ring to be damaged or even softened due to abnormal high pressure. At this time, under the pressure of the spring and the medium, the spherical surface of the support ring and the ball will form metal-to-metal contact, which can play a temporary sealing function and prevent the expansion of the fire.

2. Automatic reset of the valve seat

When the stagnation pressure in the middle cavity of the high-pressure ball valve is abnormal, especially when it exceeds the spring preload, the valve seat of the high-pressure ball valve will automatically detach from the ball, which will result in an automatic pressure relief effect, but the valve seat will also automatically reset after the pressure relief.

3. Reduce the operating torque

The packing gland of the high-pressure ball valve uses a double sealing ring, especially for gas media, and the packing can be installed in the packing tray, which can reduce the operating torque problem.

Due to these characteristics of high-pressure ball valves, they can be used in many industries. Of course, if we want the product to be put into use normally without problems, we must choose products with guaranteed quality, so as to reduce the failure rate of the product and avoid too many problems in the use of the product.