American standard pneumatic ball valve
Published: June 2, 2016 Author: 【191566.com】
Working principle of American standard pneumatic ball valve
American standard pneumatic ball valve is a rotary valve with a rotation angle of 0-90 ¡ã. It has excellent sealing performance, large flow coefficient, small flow resistance coefficient, simple structure, long service life and easy maintenance. Equipped with a cylinder-type actuator, divided into single-acting and double-acting models. Products are widely used in chemical, petroleum, textile, power, food and pharmaceutical, refrigeration, and paper industry system control.
American Standard Pneumatic Ball Valve Features
1, the fluid resistance is small, the ball valve is the smallest fluid resistance of all valves, even the reduced diameter ball valve, its fluid resistance is quite small.
2. The thrust bearing reduces the friction torque of the valve stem, which can make the valve stem operate in a balanced and flexible way for a long time.
3. The valve seat has good sealing performance. The sealing ring made of polytetrafluoroethylene and other materials has a structure that is easy to seal, and the valve sealing capacity of the ball valve increases with the increase of the medium pressure.
4. Reliable sealing of valve stem. Because the valve stem only rotates and does not perform lifting movement, the packing seal of the valve stem is not easy to break, and the sealing capacity increases with the increase of the pressure of the medium.
5. Because the materials such as polytetrafluoroethylene have good self-lubrication, the friction loss with the ball is small, and the service life of the ball valve is long.
6. Bottom-loading stem and convex step of valve stem prevent the stem from spraying out. If the valve stem seal is damaged due to fire, metal contact can be formed between the convex step and the valve body to ensure the stem seal.
American standard pneumatic ball valve ordering method
This product is directly supplied by the manufacturer. For special configuration (can be customized), please specify the following parameters when ordering:
(For example: valve type, driving method, connection type, structure type, nominal pressure, nominal diameter, input signal, sealing surface material, valve body material, applicable temperature, whether with accessories)
Nominal pressure: 150LB, 300LB, 600LB, 800LB
Operating temperature: -29 ～ 425 ℃ (carbon steel) -40 ～ + 550 ℃ (stainless steel)
Nominal diameter: DN50 ～ 800mm
Body material: 304.306.316L.WCB.HT200
Applicable medium: air, water, steam, oil and corrosive fluid such as nitric acid
Mode of action: cut-off, adjustable, manual control
Power supply voltage: 220VAC, 24VAC
Input signal: 4 ～ 20mA / 1 ～ 5VDC
0 ～ 20mA / 0 ～ 10VDC