Hunting is the continuous oscillation of pressure around the desired setpoint. This phenomenon can affect combustion and cause unwanted trips.
Potential causes
An oversized regulator, incorrect pilot adjustment, a problematic impulse line, or sudden load changes can create instability.
Relationship with load
Hunting may occur only in a specific flow range, particularly at very low loads.
How to diagnose
We record output pressure and flow on the same trend to see if the oscillation follows consumption changes.
Troubleshooting
Adjustment must be performed according to the manual and the regulator's sizing data. Arbitrary changes to setpoints can worsen instability.
