Pneumatic ball valve manufacturers teach you to buy skills

Pneumatic ball valve is a common pipeline valve, widely used in various industrial fields. In the purchase of pneumatic ball valves, you need to pay attention to the following aspects.

First, the valve material

Pneumatic ball valve material should be selected according to the use of occasions and the nature of the medium. Common materials are stainless steel, carbon steel, plastic and so on. Stainless steel pneumatic ball valves are suitable for corrosive media and other environments, while carbon steel pneumatic ball valves are suitable for some media that do not require high strength. Plastic pneumatic ball valves are suitable for some corrosive media and chemical media, such as ammonia, sulfuric acid and so on.

Second, size specifications

The size specification of the pneumatic ball valve should be determined according to the inner diameter of the pipeline, pressure and so on. In the purchase, you need to specify the inner diameter of the pipeline and pressure and other parameters, according to these parameters to choose the size specifications of the pneumatic ball valve. Generally speaking, the nominal pressure of the pneumatic ball valve should be in line with the working pressure of the pipeline, while the nominal diameter should be larger than the inner diameter of the pipeline.

Third, the valve type

Pneumatic ball valves are mainly divided into three types: full-pass, reduced diameter and diameter change. Full-pass ball valve diameter and pipe diameter of the same, which is characterized by small flow resistance, large flow, small pressure drop. Reduced diameter ball valve diameter from the pipe inlet to the middle of the pipeline is gradually reduced, the flow resistance of this valve is larger, but can reduce the noise, suitable for noise demanding occasions. Diameter change ball valve is a kind of flow path change type valve, diameter size can be changed according to the need, with the flow adjustment function.

Fourth, the actuator

Pneumatic ball valve actuator is generally composed of pneumatic piston and pneumatic valve. Pneumatic piston is often used in combination with manual valves, can also be used alone. Pneumatic valve is through the control of the gas source to control the valve open and close. In the purchase of pneumatic ball valves, you need to consider the performance of the actuator, including ease of operation, response time, action force and so on.

Five, the valve seal

Pneumatic ball valve sealing is the key to ensure the normal operation of the valve. Pneumatic ball valve sealing form mainly soft sealing and metal sealing two kinds. Soft seal made of rubber, polyurethane and other materials, sealing effect is good, but the service life is shorter. Metal seal is made of stainless steel and other materials, long service life, but the sealing effect is not as good as the soft seal. Selection needs to be based on the nature of the medium and the use of the environment to choose the appropriate sealing method.

The above are some tips for purchasing pneumatic ball valves, which need to be selected according to the specific use occasions and requirements. Before purchasing, you should conduct a full investigation and comparison, choose the reliable quality and excellent performance of pneumatic ball valves.