Antunes Controls 804111701 Pressure Switch

The Antunes Controls 804111701, also identified as the HLGP-A-2/16H-1/6L, is a heavy-duty dual gas pressure switch engineered for critical interlocking safety in industrial burner systems and oven gas trains. This HLGP-A manual reset switch features two independent SPDT switch mechanisms housed in a rugged die-cast aluminum enclosure, allowing for simultaneous monitoring of high and low pressure conditions. The high-pressure side provides an adjustable setpoint range of 2-16" WC, while the low-pressure side covers 1-6" WC. Designed for reliability in harsh environments, it handles a maximum surge pressure of 10 PSI and operates within an ambient temperature range of -40°F to 140°F. Installation is streamlined with a 3/8" NPT high pressure connection, a 1/8" NPT low pressure inlet, and a 1/8" NPT vent. This FM approved gas switch ensures the electrical control circuit is broken if gas levels drift outside specified parameters, requiring a manual reset to resume operation, thus preventing automated cycling under unsafe conditions.

Key Benefits

• Dual-Sensing Integration: Combines high and low pressure monitoring into a single unit, reducing piping complexity and footprint.
• Manual Reset Safety: High and low gas pressure switches with manual reset functionality ensure deliberate operator intervention before system restart.
• Rugged Industrial Housing: Durable die-cast aluminum construction protects internal SPDT contacts from site debris and mechanical stress.
• Flexible Mounting: Designed for horizontal mounting; does not require precision leveling for accurate setpoint triggering.
• Clear Setpoint Indication: Features high-visibility scale indicators for precise field adjustments of water column settings.

Common Questions

How do you wire the Antunes 804111701 for a safety limit circuit?
The 804111701 pressure switch utilizes two SPDT switches. For a standard safety limit, wire the Normally Closed (NC) contacts in series with your fuel valve or flame safeguard controller so the circuit opens upon a pressure fault.

What is the difference between the 804111701 and the HLGP-A-2/16H-1/6L?
There is no functional difference; 804111701 is identical to HLGP-A-2/16H-1/6L, representing the specific part number for the 2-16" high and 1-6" low pressure configuration.

Does this unit require a vent line?
Yes, the Antunes HLGP-A includes a 1/8" NPT vent connection. Local codes generally require venting gas pressure switches to a safe outdoor location to prevent gas accumulation in the mechanical room in the event of a diaphragm rupture.

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.