Brahma Pressure switch PGF 75017080

The Brahma PGF pressure switch, SKU 75017080, is a device used in burner safety circuits to confirm that pressure or airflow is within an acceptable range. It can serve as an air pressure switch to prove the fan is delivering combustion air, or as a gas pressure switch to monitor minimum or maximum gas pressure. The switch sends a signal to the burner control to allow the ignition sequence to proceed; if the pressure is outside set limits, the control will not start or will go to lockout.

For replacement, parts of this type are selected by the medium (air or gas), the switching range and differential, the type of connection (threaded port or hose spigot), contact rating, and any required approval class. When fitting a replacement, check that the setpoint matches the original specification and ensure the impulse line is clear and the switch is correctly adjusted before commissioning.

Typical failure modes include a torn diaphragm, a blocked impulse tube, or a drifted setpoint, all of which can cause lockouts that appear to be ignition faults. The equipment may fail to start or go into lockout when the pressure is outside the set limits.