Antunes Controls 803112509 Pressure Switch

The Antunes Controls 803112509 is a heavy-duty LGP-A Model Low Gas Pressure Switch designed to monitor gas line pressure and interrupt the control circuit when pressure drops below the desired setpoint. This manual reset SPDT gas pressure switch operates within a range of 1" to 35" W.C., providing critical safety for commercial and industrial combustion systems. Engineered for durability, it features a 1/4" NPT connection for main gas line integration and a 1/8" NPT vent for atmospheric reference or venting requirements. The Single Pole Double Throw (SPDT) electrical configuration allows for flexible wiring, enabling the system to trigger alarms or shut down burners upon a low-pressure event. This unit is built to withstand rigorous field conditions, ensuring precise pressure monitoring and reliable combustion safety control. Contractors rely on the LGP-A series for its repeatable trip points and rugged die-cast aluminum housing, making it a standard component for gas-fired equipment maintenance.

• Adjustable Range: Provides a versatile 1" to 35" water column setpoint range for various application requirements.
• Manual Reset Feature: Ensures the system remains offline after a low-pressure event until a technician verifies gas line safety.
• Simplified Installation: Standard 1/4" NPT furnace gas connection and compact footprint allow for quick field replacement.
• Durable Construction: Built with industrial-grade materials to ensure longevity in high-heat and vibrate-prone environments.
• Electrical Versatility: The SPDT switch contacts permit simultaneous control of a safety valve and a remote status indicator.

What is the purpose of the 1/8" NPT vent on this switch?
The 1/8" NPT port acts as a vent or a breather to ensure the internal diaphragm moves freely according to atmospheric pressure, ensuring an accurate low gas pressure trip point.

Can this switch be used for high-pressure sensing?
No, the Antunes 803112509 is specifically an LGP (Low Gas Pressure) model designed to trip when pressure falls below the setpoint. For high-pressure protection, an HGP model is required.

How do I reset the device after it trips?
Once the gas pressure has been restored to a level above the setpoint, the technician must manually depress the reset button on the housing to restore the electrical circuit.

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.