Pressuretrol Controller

The PA404 is a series 40 (2-wire, SPST) Pressuretrol controller for use in 24, 120, 240, or 277 V control circuits or in self-powered (millivoltage) applications.

• Pressure controller breaks an electrical circuit to shut down the burner if steam pressure rises above a safe level.
• Sensitive pressure actuated diaphragm expands or contracts with pressure variations, moving a lever mechanism which operates the snap switch
• A screw on top of the case allows set point adjustment without removing the cover.
• Differential is adjusted by means of a dial located inside the case