Product Details

The Fireye PSA-2-5F is a compact adjustable differential pressure switch designed for combustion air and flue gas supervision on Fireye burner management systems. This adjustable air pressure switch monitors air flow and differential pressure inside the burner duct, providing dry contact signal for safety interlock. As a reliable burner differential pressure switch, it features adjustable set point within its working range, fixed switching hysteresis, and robust diaphragm sensing structure that resists dust and vibration inside boiler air ducts. This combustion air interlock switch serves as a critical safety component to verify blower operation and adequate air supply before fuel valve opening, and it is stocked as genuine replacement spare part for industrial burner safety circuits.

Basic Parameters

Brand: Fireye

Model: PSA-2-5F

Type: Differential pressure switch

Pressure setting range: 0.2 to 5 in W.C.

Sensing element: Reinforced rubber diaphragm

Output: SPDT dry contact

Contact rating: 5 A @ 120 / 240 VAC

Connection: 1/8 inch barb fitting for pressure tubing

Mounting: Surface mount

Compatible systems: Fireye BurnerLogix, Nexus and legacy burner sequencing controls

Media: Clean combustion air, non‑condensing flue gas

Adjustment: Rotary set point screw

Product type: Original Fireye safety pressure switch

Supported Functions

This pressure switch continuously detects differential air pressure generated by the blower. If air pressure falls below the preset threshold, the contact changes state to lock out the burner and prevent unsafe fuel delivery without sufficient combustion air. It validates blower startup before ignition and provides running supervision during firing to shut down the burner upon loss of air flow.

Core Functions

The wide adjustable range covers low air flow supervision for small and medium industrial burners. Barb connections simplify tubing installation for static pressure taps. The mechanical diaphragm design works without external power supply and offers long service life under cyclic air pulsation, and it serves as direct drop‑in substitution for existing PSA-2-5F pressure switches.

Hardware Specifications & Environmental Features

Mounting: Surface mounting

Operating temperature: -20 °C to +70 °C

Storage temperature: -40 °C to +75 °C

Relative humidity: 5% – 90%, non‑condensing

Housing: Rugged plastic enclosure

Condition: Original new Fireye pressure switch

Industry Applications: Applied in legacy petrochemical distributed control, old paper making production automation, material handling conveyor lines, packaging and textile machinery, water treatment remote signal collection and large conveyor remote I/O control racks.

Note: Confirm pressure set point, tubing size and interlock wiring before ordering; this switch is for air and non‑condensing flue gas only, not suitable for wet steam or corrosive gas.

This is from our current stock.

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