Pneumatic Actuator Ball Valve System
A pneumatic actuator ball valve combines the efficiency of a ball valve with automated pneumatic control, offering precise fluid flow management in industrial applications.
Key Components
- Ball Valve Core: Hollow, perforated ball connected to a stem
- Pneumatic Actuator: Piston/diaphragm mechanism with spring return
- Positioners (optional): For precise flow control via 4-20 mA signals
- Sealing System: Prevents leakage around ball and stem
Operating Principle
The system uses compressed air (typically 4-6 bar) to rotate the ball valve. When the ball's hole aligns with the valve ports, fluid flows through. A 90° rotation blocks flow completely.
1. Air Supply
Compressed air enters the actuator chamber, pushing the piston/diaphragm.
2. Valve Rotation
The actuator converts linear motion to 90° rotation of the ball via the stem.
3. Spring Return
When air pressure releases, the spring returns the mechanism to default position.
Performance Characteristics
- Fast Response: Typically under 1 second operation
- Binary Operation: Full open/close positions
- Modulating Control: Available with positioners
- Tight Shutoff: Zero leakage when closed
Industrial Applications
This valve system is ideal for processes requiring rapid, reliable flow control such as:
Chemical Processing • Water Treatment • Oil & Gas • Pharmaceutical • Power Generation
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