Armstrong International 75A3 Trap

The Armstrong International 75A3 Trap is a high-performance 3/4" NPT steam trap designed for industrial heating applications requiring efficient condensate removal and rapid air venting. As part of the prestigious Series A Cast Iron Float & Thermostatic Steam Trap family, this unit features a robust cast iron body and a thermostatic air vent equipped with a balanced pressure phosphor-bronze bellows caged in stainless steel. Specifically engineered for heat exchange equipment, the 75A3 model operates at a maximum operating pressure of 75 PSI and uses an 11/64" orifice to deliver a condensate capacity of approximately 1,800 to 1,870 lb/hr. Its same-side connection orientation simplifies piping in tight mechanical spaces, ensuring reliable drainage for modulating pressures and widely varying loads without the risk of air binding.

Key Benefits:

• Superior Air Handling: The integral thermostatic vent quickly discharges air and non-condensable gases, preventing heat transfer bottlenecks.
• Continuous Drainage: The float-operated mechanism ensures immediate condensate removal as soon as it forms, maintaining peak system efficiency.
• Rugged Construction: Built with an ASTM A48 Class 30 cast iron body and 304 stainless steel internals for long-term durability in demanding HVACR environments.
• Modulating Load Excellence: Ideal for equipment with fluctuating steam pressures or variable condensate rates, such as unit heaters and heat exchangers.

Common Questions:

What is the maximum pressure for the Armstrong 75A3?
The 75A3 is designed for a maximum operating pressure (MOP) of 75 PSI, though the A Series body design can often withstand higher allowable pressures for safety.

Can this trap be installed in vertical piping?
No, the Armstrong 75A3 is specifically designed for horizontal installation with the float mechanism operating on a level plane to ensure proper opening and closing.

Does this model include a vacuum breaker?
The standard 75A3 does not include an integral vacuum breaker, though it can often be added as an option (suffix -VB) if your specific application requires vacuum protection.

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.

This item is not eligible for free shipping.