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Pneumatic vacuum ball valve
Pneumatic vacuum ball valve refers to a valve whose working pressure is lower than the standard atmospheric pressure, that is, it is in a vacuum negat
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Overview of Pneumatic Vacuum Ball Valve:
Pneumatic vacuum ball valve refers to a valve whose working pressure is lower than the standard atmospheric pressure, that is, it is in a vacuum negative pressure state, so it is usually also called pneumatic negative pressure ball valve, mainly used for switch control or flow regulation in vacuum systems. Pneumatic vacuum ball valves have very high requirements for materials and cleanliness, as they must ensure no volatile substances under vacuum and have undergone sealing strengthening treatment to effectively prevent atmospheric impurities from entering the valve chamber and contaminating the medium. Pneumatic vacuum ball valves can be installed in any position, not only for use in vacuum piping systems, but also for normal operation under certain pressure.
Characteristics of Pneumatic Vacuum Ball Valve:
1. It can work normally under high vacuum conditions and can also be applied to low-pressure systems, achieving the advantage of using both positive and negative pressures;
2. Pneumatic vacuum ball valves use gas source pressure to control the valve, with a small driving torque and the ability to quickly open and close in a short period of time;
3. It can be installed at any position and has multiple different connection methods to meet any complex situation;
4. Pneumatic high vacuum ball valves have a simple structure and good sealing performance. Different materials and forms of action can be selected to correspond to different working conditions.
5. Widely used in vacuum, dairy products, wine industry, biotechnology, food and chemical industries, it can effectively ensure the sealing performance of valves.
Technical parameters of pneumatic vacuum ball valve:
Technical parameters of pneumatic vacuum ball valve:
| Nominal Diameter | DN15～DN100(mm) |
| Pressure Range | 1.3×10-7Pa～6×105pa |
| Connection method | Flexible flange, welded flange, quick fit, threaded |
| Valve body structure | Three piece valve body |
| Drive mode | Pneumatic control 0.4-0.7 bar |
| operation temperature | -30℃～+232℃ |
| Applicable Medium | High purity gas and non corrosive gas |
| Action form | Single acting spring reset (normally open, normally closed), double acting (gas on/off) |
| control mode | Cut off type (switch two position control), adjustment mode (4-20mA signal proportional adjustment) |
How to reduce the leakage rate of pneumatic vacuum ball valves:
1. The pipeline connected to the pneumatic high vacuum ball valve is evacuated, and a circular arc transition is used to ensure that the air path is not blocked and can be unobstructed.
2. Try to avoid dead corners as much as possible and use high-precision polishing that fully complies with the applicable standards of vacuum.
3. Strengthen the polishing treatment of the inner and outer surfaces of the pneumatic high vacuum ball valve to prevent gas adsorption and achieve vacuum effect.
4. Minimize the volume of the vacuum system as much as possible and shorten the length of the piping system.
5. The materials used not only require a smooth surface, no scratches, and no cracks, but also low permeability and gas release rate, good heat and oil resistance, as well as certain strength, hardness, and elasticity.
Related products:Electric vacuum ball valve Pneumatic sanitary grade ball valve Pneumatic high-pressure ball valve
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