Resideo by Honeywell PA404A1009/B Pressuretrol Controller with Additive Differential 1-5 PSI

The Resideo by Honeywell PA404A1009/B is a Series 40 pressuretrol controller designed as a pressure-actuated high limit safety control for steam heating boilers. This critical safety device breaks an electrical circuit to shut down the burner if steam pressure rises above a safe level, protecting your system from dangerous overpressure conditions.

Key Features:

• 2-wire SPST configuration for use in 24, 120, 240, or 277 volt control circuits or self-powered millivoltage applications
• Adjustable differential pressure range of 1 to 5 PSI with additive differential
• Operating range of 0.5 to 9.0 PSI adjustable
• SPST MICRO SWITCH snap-acting switch for reliable operation
• Convenient screw adjustment on top of case allows setpoint changes without removing the cover
• Internal dial for differential adjustment
• Sensitive pressure-actuated diaphragm expands or contracts with pressure variations
• Maximum operating pressure of 20 PSI and maximum ambient temperature of 150°F
• Mounts via 1/4 inch female pipe threads

Technical Specifications:

• Compact dimensions: 4-15/32" high x 3-3/8" wide x 2-1/4" deep
• Electrical ratings: 0.25A @ 0.25-12 Vdc; 8.3A @ 120/240 Vac resistive; 7.2A @ 277 Vac resistive
• Gray enamel finish with 1/2 inch conduit wiring access
• UL Listed and CSA Listed for safety compliance

This bulk pack version is ideal for contractors and HVAC professionals who require a reliable, field-proven pressure control solution for residential and light commercial steam boiler applications.