Pneumatic High Vacuum Ball Valves
The pneumatic high‑vacuum ball valve changes air circuit direction via solenoid directional valve, and drives the ball valve by controlling the actuating cylinder to connect or cut off medium flow in vacuum (pressure) system pipelines. It is applied in vacuum, dairy, wine, bio‑engineering, food, pharmaceutical, beverage, cosmetic and chemical industries. Feedback signal devices and electric valve positioners are optional. GUQ pneumatic high‑vacuum ball valve is a pneumatic valve for opening or cutting off air flow in vacuum systems ranging from 1.3×10‑7~6×10⁵Pa. It is widely suitable for various positive and negative pressure pipeline systems of gas, liquid and other media, and complies with GMP standards.

Product Features
1. Reasonable sealing‑structure design, leakage rate reaches <1×10‑10Pa·M³/S, breaking the limitation that ordinary ball valves cannot meet high‑vacuum and ultra‑high‑vacuum requirements.
2. Low switching torque, compatible with small‑size pneumatic actuators, stable and reliable operation.
3. Compact structure, light weight, simple and elegant appearance.
4. Suitable for both high‑vacuum conditions and certain positive‑pressure working conditions.
5. Full‑bore design meets ultra‑high‑vacuum requirements, so it can also be used for accelerator vacuum systems.
Main Performance
| Leakage Rate | 1.3×10‑9Pa·M³/S |
| Pressure Range | 5×10‑7Pa~0.6Mpa |
| Operating Temperature | -30℃~+232℃ |
| Air Supply Pressure | 0.4~0.6 Mpa |
| Working Medium | Water, Steam, Acid, Alkali |
| Mounting Position | Arbitrary |
| Service Life | ≥20000 cycles |
Actuator Parameters
| Actuator Model | GT, AT, AR, AW series single‑acting and double‑acting pneumatic actuators |
| Air Supply Pressure | 0.4~0.7MPa |
| Air Port | G1/4", G1/8", G3/8", G1/2" |
| Ambient Temperature | -30~+70℃ |
| Action Mode | Single‑acting: Air‑to‑close(B)‑FO(fail open); Air‑to‑open(K)‑FC(fail close). Double‑acting: Air‑to‑close(B)‑FL(fail lock); Air‑to‑open(K)‑FL(fail lock) |
| Optional Accessories | Positioner, Solenoid valve, Air filter regulator, Lock‑up valve, Limit switch, Valve position transmitter, Handwheel mechanism |
New‑type pneumatic actuators include double‑acting and single‑acting (spring return) types with rack‑and‑pinion transmission for high safety and reliability. Large‑bore valves adopt AW series pneumatic actuators with scotch‑yoke transmission, featuring reasonable structure and large output force, available in double‑acting and single‑acting versions.
1. Double‑piston gear structure delivers large output torque with compact dimension.
2. Aluminum alloy cylinder for light weight and nice appearance.
3. Manual override can be installed on top or bottom.
4. Rack connection allows adjustment of opening angle and rated flow rate.
5. Actuators can be equipped with electric signal feedback and accessories for automatic operation.
6. ISO5211 standard connection facilitates installation and replacement.
7. Adjustment screws at both ends provide ±4° adjustable range at 0° and 90°, ensuring synchronization accuracy with internal‑thread pneumatic ball valves.
Product Selection
(1) Valve body parameters: Nominal diameter, working pressure, process medium, application scenario, valve body material and other specifications.
(2) Actuator parameters: Actuator type, control mode, control signal (4‑20mA,1‑5V), action mode (air‑to‑open, air‑to‑close).

















