Overview
The Chicago Safety Products HLGP is a dual gas pressure safety switch engineered for commercial and industrial burner control systems. This pressure switch monitors both high and low pressure conditions simultaneously, making it ideal for furnace safety interlocks and gas line protection. The HLGP model is widely used in heating, boiler, and combustion equipment to prevent dangerous overpressure and underpressure conditions.
Key Features
- Dual pressure monitoring — High and low pressure setpoints in a single switch
- 125–700 mm WC (5–28″ WC) pressure range capability
- 125/250 VAC electrical rating for standard facility power
- Compact design suitable for tight mounting spaces
- SPDT (single-pole, double-throw) contact configuration
- Proven reliability in burner safety and furnace control applications
Technical Specifications
- Electrical Rating: 125/250 VAC
- Pressure Range: 125–700 mm WC (5–28″ inches WC)
- Contact Type: SPDT (Single-Pole Double-Throw)
- Body Material: Metal housing with brass connections
- Connection Type: NPT port connections
- Operating Temperature: Standard ambient to 140°F (60°C) typical
Typical Applications
- Burner flame-out safety interlocks
- Gas furnace overpressure protection
- Boiler feed water level backup
- Low-pressure alarm and cutoff functions
- Industrial heating equipment control
- HVAC system safety shutdown
Compatibility & Replacements
Compatible With
- Standard 125/250 VAC control circuits
- Gas burner ignition systems
- Furnace and boiler control boards
- Pressure tubing (NPT connections)
- Industrial heating control platforms
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. Chicago Safety Products pressure switches with matching electrical ratings and pressure setpoints may be substituted; consult the original equipment documentation for exact model compatibility.
Works With
- Standard two-wire pressure sensing circuits
- Burner management systems
- Flame relay and ignition modules
- Manual and automatic reset safety interlocks
- Control voltage 125/250 VAC systems
