Pneumatic flange ball valve has the characteristics of fast switching speed, large flow capacity and good sealing performance. It is composed of flange type ball valve and pneumatic actuator. According to different action forms, it can be divided into switch type and adjustment type. When the pneumatic flange ball valve is opened, the valve channel and the connecting pipe diameter form a through port, and the medium can flow through without resistance. In addition to oil, gas, liquid and other media, it is also suitable for controlling sewage and medium containing fibrous impurities. Pneumatic flange ball valve is equipped with valve positioner to input 4-20mA analog signal, which can control the valve core opening of ball valve from 0 to 90 degrees, so as to achieve the proportional adjustment of medium flow, temperature, pressure and other parameters.
Advantages of pneumatic flange ball valve:
1. According to the working conditions, the pneumatic flange ball valve can be divided into soft seal (- 30 ~ 180 ℃) and hard seal (- 40 ~ 450 ℃), so as to be used in different media, temperature and pressure.
2. The power source of pneumatic flange ball valve is gas, which will not contact with sparks. Theoretically, it has explosion-proof function and is relatively safe. And if there is air leakage, the gas can be directly discharged, no pollution to the environment, at the same time, it has high safety.
3. From the perspective of valve diameter, due to torque force, manual ball valve can only be equipped with ball valve with diameter below DN300, while pneumatic flange ball valve can be configured with a wide range of diameters, including not only small diameter ball valve, but also large diameter ball valve. At present, the maximum diameter of pneumatic ball valve can reach DN 1200.
Optional accessories for pneumatic flange ball valve:
Triplet: it can stabilize the air source, filter and add lubricating oil to the cylinder
Feedback device: also known as limit switch, remote feedback switch signal (explosion proof optional)
Solenoid valve: two position five way for double action and two position three-way for single action (explosion-proof optional)
Positioner: input 4 ~ 20mA signal to realize valve regulation function
Manual mechanism: manual operation mechanism, which can open or close the valve manually
Adjustable accessories: Electric positioner, pneumatic positioner and electric converter.
Cut off type accessories: single electric control solenoid valve, double electric control solenoid valve, limit switch feedback device.
Structural drawing of pneumatic flange ball valve