Antunes Controls 804111704 Pressure Switch

The Antunes Controls 804111704 HLGP-A is a commercial-grade High-Low Gas Pressure Switch designed for precise monitoring of gas manifold pressures. This model features a dual-switch configuration, providing a High Gas Pressure Switch range of 2" to 16" W.C. and a Low Gas Pressure Switch range of 2" to 14" W.C. Engineered with 2-SPDT (Single Pole Double Throw) circuitry and a manual reset mechanism, it ensures equipment safety by locking out the burner system when pressure exceeds or falls below calibrated setpoints. The 1/8" NPT connection and 1/8" NPT vent allow for standard integration into industrial burner trains and furnace setups. Designed for reliability in demanding environments, the HLGP-A is a critical component for interlocking gas safety protocols, preventing hazardous conditions in forced draft burners and process heating equipment. This gas pressure limit switch provides the rugged durability required for sensitive mechanical adjustments and long-term field stability.

• Dual-Action Monitoring: Combines high and low pressure sensing in a single compact housing to reduce piping complexity.
• Manual Reset Safety: Requires onsite intervention after a trip, ensuring the technician identifies the pressure fault before system restart.
• Flexible SPDT Logic: Dual SPDT contacts allow for simultaneous alarm signaling and system shutdown.
• Precise Setpoints: High range (2-16" W.C.) and Low range (2-14" W.C.) cover the majority of low-pressure commercial gas applications.
• Durable NPT Ports: Standardized 1/8" NPT gas connection ensures a leak-free interface with existing manifolds.

What is the difference between the HLGP-A and standard automatic switches?
The HLGP-A requires a manual reset, which is often mandated by code for high-limit and low-limit safety interlocks to ensure a technician inspects the system after a pressure deviation.

Can this switch be used with propane (LPG) and natural gas?
Yes, the Antunes HLGP-A is compatible with natural gas, propane, and air, making it versatile for various industrial combustion requirements.

Do I need to vent this switch?
This model includes a 1/8" NPT vent port. Depending on local mechanical codes, it may require venting to a safe outdoor location if the internal diaphragm ruptures.

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.