A.J. Antunes 8024204107 Pressure Switch

The A.J. Antunes 8024204107 (Model SMD) is a field-adjustable air differential pressure switch engineered for precise airflow monitoring in commercial HVAC, exhaust systems, and industrial air handling equipment. This SPDT pressure switch provides versatile control with a set point range of 0.17 to 6 inches water column (W.C.), ensuring accurate sensing for proof-of-airflow and combustion safety circuits. Built for heavy-duty applications, the unit features FM approval, meeting rigorous safety standards for high-limit or operating control. Installation is streamlined via dual connection points: a 1/4" male NPT bottom connection and a 1/8" female NPT side connection. This configuration allows technicians to integrate the switch into compact burner assemblies or complex ductwork where space is restricted. By sensing the pressure drop across filters or coils, the A.J. Antunes 8024204107 delivers the reliable switching performance required to prevent equipment failure and maintain optimal system static pressure.

Key Benefits for Contractors

• Dual Connection Ports: Features both 1/4" male NPT and 1/8" female NPT fittings for flexible plumbing in the field.
• Broad Adjustment Range: The 0.17" to 6" W.C. range covers a wide variety of HVAC airflow monitoring and commercial kitchen exhaust requirements.
• Safety Compliance: FM Approved for use in safety-critical applications, ensuring reliability as a limit control.
• Durable Construction: Designed to withstand the high-cycle demands of industrial air handling and combustion air systems.
• Precision Switching: The SPDT (Single Pole Double Throw) electrical configuration allows for both normally open and normally closed wiring options.

Common Questions

What is the maximum operating pressure for the Antunes Model SMD?
The Model SMD series is typically rated for a maximum glass pressure of 1/2 PSI (approx. 13.8" W.C.); always verify specific system surges do not exceed this threshold to prevent diaphragm damage.

Can this switch be used for sensing vacuum?
Yes, as a differential pressure switch, it can be used to sense positive, vacuum, or differential pressure by utilizing the appropriate NPT ports for the high and low-pressure sides.

Is the 8024204107 a suitable replacement for other SMD models?
While many SMD models look similar, always confirm the 0.17"–6" W.C. range and electrical ratings match your original OEM specifications before installation.

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.