A.J. Antunes 804111708 Pressure Switch

The A.J. Antunes 804111708 Pressure Switch (Model HLGP-A) is a rugged, dual-purpose monitor engineered for precision in industrial gas trains and commercial HVACR systems. This high and low gas pressure switch features two independent 2-SPDT (Single Pole Double Throw) circuits, allowing for simultaneous monitoring of over-pressure and under-pressure conditions. The high-pressure side is adjustable from 10-50" WC, while the low-pressure side covers 6-24" WC, providing a critical safety interface for burners and atmospheric boilers. Designed for demanding field environments, the unit includes a manual reset functionality, ensuring that technicians must investigate the cause of a pressure excursion before resuming operation. Integration is streamlined via a 3/8" NPT high pressure connection, a 1/8" NPT low pressure connection, and a designated 1/8" NPT vent. This OEM component ensures high-repeatability and adherence to strict safety protocols in gas-driven machinery.

• Dual-Circuit Monitoring: Combines high and low pressure sensing in a single compact housing to reduce piping complexity and installation footprint.
• Manual Reset Safety: Prevents automatic recycling of gas equipment after a pressure fault, requiring a manual technician check-out.
• Versatile 2-SPDT Switches: Provides flexible wiring options for alarm circuits, control interlocks, or status indicators.
• Industrial-Grade Connections: Features standard NPT threading for a leak-free interface with existing gas manifolds.

Common Questions

What is the purpose of the 2-SPDT configuration in this switch?
The 2-SPDT configuration allows the A.J. Antunes 804111708 to control two separate electrical loads or circuits for each pressure set point. This is often used to shut down a burner while simultaneously triggering a remote alarm or BMS notification.

Can this pressure switch be used for air sensing as well as gas?
While functionally similar to air switches, the HLGP-A is specifically rated and constructed for gas pressure monitoring. Always verify fluid compatibility with natural gas or LP applications as per the manufacturer's technical data sheet.

How do I adjust the set points for the high and low limits?
Adjustments are made via the internal scales. The high side is calibrated for 10-50" WC and the low side for 6-24" WC. Use a calibrated manometer during commissioning to ensure the A.J. Antunes 804111708 trips at the exact specified parameters.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.