Conditions For Selection And Operation Of Pneumatic Ball Valves

Speaking of the new valves that have been widely used in recent years, we have to mention 2 Piece Ball Valve. Pneumatic ball valves are ball valves equipped with pneumatic actuators. In practical applications, they are often used as valves to control the flow direction of the medium in the pipeline. Let's talk about how to choose pneumatic valves.

1. Selection according to working conditions

The temperature of the medium is very important. Some pneumatic ball valves are suitable for handling hot fluids and some are suitable for handling cold fluids. Pneumatic ball valves for different applications are made of different materials, including ceramics, stainless steel metal materials and PVC plastics. When purchasing pneumatic ball valves, you must clarify your actual needs and the application environment of the product.

2. Selection according to working pressure

When the pneumatic valve is closed, it will be subjected to the pressure generated by the accumulation of the medium in the pipeline. Therefore, when purchasing a pneumatic ball valve, you must determine the pressure range that the valve needs to withstand when working, and then select the corresponding specifications.

3. Selection based on medium fluid

The actual needs of customers are diverse. Some purchase pneumatic ball valves to handle ordinary flowing water, such as in hydroelectric power plants, while others need to use them to control the flow of chemical media, or even radioactive substances, which requires pneumatic ball valves to be designed with different fluid control systems.

4. Selection based on price

If you are not sure what model to choose when purchasing a ball valve, it is easy to waste money that should not be spent, because the price of pneumatic ball valves is also related to the specifications and models.

There are many companies on the market that specialize in the production and sale of industrial application valves, but the quality is good and bad. It is easier to suffer losses just by looking for cheap pneumatic ball valves, because the quality is really very poor, so it must be combined with the above points. The following is a brief explanation of the correct method of operating pneumatic ball valves.

Operation method of pneumatic ball valves:

1. The opening and closing direction of pneumatic valves during operation should be closed clockwise.

2. Since pneumatic valves in pipe networks are often opened and closed manually, the number of opening and closing revolutions should not be too many, even large-diameter valves should be within 200-600 revolutions.

3. In order to facilitate one person's opening and closing operation, the maximum opening and closing torque should be 240N-m under the condition of pipeline worker pressure.

4. The opening and closing operation end of the pneumatic valve should be a square tenon, with standardized size and facing the ground, so that people can operate directly from the ground. Valves with wheel discs are not suitable for underground pipe networks.

5. Display panel for the opening and closing degree of pneumatic valves:

① The scale lines of the opening and closing degree of the pneumatic valve should be cast on the gearbox cover or on the outer shell of the display panel after the direction is changed, all facing the ground, and the scale lines should be painted with fluorescent powder to make them eye-catching;

② The material of the indicator dial needle can be stainless steel plate under good management, otherwise it is painted steel plate, and aluminum sheet should not be used;

③ The indicator dial needle is eye-catching and firmly fixed. Once the opening and closing adjustment is accurate, it should be locked with rivets.

6. If the pneumatic valve is buried deep, and the distance between the operating mechanism and the display panel and the ground is ≥1.5m, an extension rod should be installed and fixed firmly so that people can observe and operate from the ground. In other words, the opening and closing operation of the valves in the pipeline network should not be carried out in the well.