The principle of pneumatic UPVC butterfly valve is to meet the needs of different occasions. The principle of the new pneumatic UPVC butterfly valve has 0-90 degrees, 0-120 degrees, and 0-180 degrees. Pneumatic UPVC butterfly valves can also provide angular stroke actuators such as 0-140 degrees. 0-160 degrees, etc., when the pneumatic UPVC butterfly valve is selected, the safety value is added to the determined torque to increase the safety value by 25%, the pneumatic UPVC butterfly valve non-lubricating slurry liquid medium increases the safety value by 30%, the pneumatic UPVC butterfly valve The non-lubricated dry gas medium increases the safety value by 40%, the non-lubricated gas conveyed particulate material medium increases the safety value by 60%, and the pneumatic UPVC butterfly valve increases the safety value by 20% for the clean, low-friction lubricating medium. The above-mentioned safety value It is a theoretical recommendation of the company and is strictly for reference. The editing copyright belongs to Shanghai Huanqi. There will be no notice when the content of this document changes, and the company has the final right of interpretation.
Pneumatic UPVC butterfly valve pneumatic actuator (commonly referred to as pneumatic head) is also referred to as pneumatic actuator or pneumatic device. It is an actuator that uses compressed air pressure to drive opening and closing or adjusting valves. Pneumatic UPVC butterfly valves are mainly composed of air cylinders. Pistons, gear shafts, end caps, seals, screws, etc., pneumatic actuators are generally used with various types of valves, pneumatic UPVC butterfly valves, which also include opening instructions, stroke limits, solenoid valves, positioners, pneumatic components, manual The mechanism, signal feedback and other components, the valve opening, closing, how much to open, how much to close, are all controlled by compressed air. Shanghai Huanqi Pneumatic UPVC butterfly valve pneumatic actuator works. Pneumatic actuators can be divided into single-acting and double-acting according to the form of action. Double-acting actuators are air-opening and air-closing, that is, when the ventilation is opened, the ventilation is closed, and when the air source is lost , No action, stay in place, and single-acting actuators have the function of spring return. Generally, there are normally closed and normally open types, that is, the ventilation is open. When the air source is lost, the pneumatic UPVC butterfly valve automatically resets to the initial state. It is used more frequently in working conditions, and the valve can be quickly closed or opened when a sudden failure occurs when the gas supply is lost.

Pneumatic UPVC butterfly valve double-acting pneumatic actuator working principle:

Pneumatic UPVC butterfly valve, when the air source pressure enters the cavity between the two pistons of the cylinder from the air port (2), the two pistons are separated and move toward the two ends of the cylinder. The rack synchronously drives the output shaft (gear) to rotate counterclockwise, the pneumatic UPVC butterfly valve, on the contrary, when the air source pressure enters the air chambers at both ends of the cylinder from the air port (4), the pneumatic UPVC butterfly valve moves the two pistons in the direction of the middle of the cylinder, and the middle air chamber is The air is discharged through the air port (2), and the pneumatic UPVC butterfly valve simultaneously causes the two piston racks to synchronously drive the output shaft (gear) to rotate in a clockwise direction. (If the piston is installed in the opposite direction, the output shaft will become reverse rotation)