Pneumatic Butterfly Valve Adjustment
Precise calibration of actuator and control system for optimal flow regulation
Adjustment Procedure
Adjusting the opening angle of a pneumatic butterfly valve requires careful calibration of the actuator and control system to achieve precise flow regulation.
Always ensure the valve is in a deactivated state with the air supply disconnected before beginning any adjustment procedure. This prevents accidental movement and protects both equipment and operator.
Initial Setup
- Ensure valve is in deactivated state
- Disconnect air supply to prevent accidental movement
- Verify system is safe for adjustment
Locate Limit Stops
- Identify mechanical stops on the actuator
- These control maximum opening/closing positions
- Typically adjustable via screws or bolts
Test Current Range
- Reconnect air supply temporarily
- Activate valve to observe full range
- Note discrepancies from desired angles
Adjust Limit Stops
- Loosen locking mechanisms carefully
- Adjust stops incrementally
- Reposition opening/closing stops as needed
Verify Settings
- Send incremental input signals
- Measure corresponding valve positions
- Ensure smooth and accurate angle changes
Final Testing
- Tighten locking mechanisms on limit stops
- Cycle valve through various positions
- Check for consistent response to control signals
After adjustment, conduct a full operational test by cycling the valve through various positions. Check for consistent response to control signals and confirm that the opening angle remains stable during extended operation.
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