A vacuum valve maintains a negative pressure within its cavity, crucial for vacuum piping systems requiring high purity. Types include vacuum ball control valve, vacuum butterfly control valve, and diaphragm valves.

Key features include:
1. Operates with a 1/4 rotary pneumatic or electric actuator for smooth performance. Offers electric signal output for manual and automated control.
2. Features a simple structure with excellent sealing, compact installation size, low driving torque, and easy operation for fast opening and closing.
3. Suitable for both high vacuum and low-pressure systems, enabling efficient operation under positive and negative pressures.

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