Armstrong International 30A3 Trap

Optimizing your steam system requires a high-performance Armstrong International 30A3 steam trap. This float and thermostatic steam trap is engineered specifically for applications with modulating pressures and varying loads, such as heat exchangers and unit heaters. Featuring a 3/4" NPT connection and a 30 PSI maximum operating pressure, the 30A3 utilizes a balanced pressure phosphor-bronze bellows caged in durable stainless steel to quickly vent air and non-condensable gases. Its cast iron body construction ensures long-term reliability in industrial environments, while the 1/4" orifice provides a high discharge capacity for condensate. By integrating the Armstrong 30-A3 into your piping, you ensure efficient heat transfer and protection against water hammer, maintaining the thermal integrity of your process equipment. This Series A steam trap is a preferred choice for technicians seeking a rugged, same-side connection solution that handles start-up air loads effectively with an integrated thermostatic air vent.

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• Superior Air Venting: The integrated thermostatic vent handles large volumes of air during start-up and operation, preventing air binding.
• Rugged Construction: Built with high-quality ASTM A48 Class 30 cast iron and stainless steel internals for enhanced durability.
• Continuous Discharge: The float mechanism responds immediately to condensate level changes, ensuring steady drainage without steam loss.
• Modulating Pressure Support: Ideal for systems where steam pressure varies, providing consistent performance across its 0-30 PSI range.
• Compact Design: Same-side inlet and outlet configuration allows for simplified installation in tight piping footprints.

How does the Armstrong 30A3 handle non-condensable gases?
The trap features a balanced-pressure bellows air vent that opens when temperatures drop slightly below saturation, allowing air to escape through a separate orifice.

Can this trap be used for outdoor applications?
While durable, cast iron traps should be properly insulated or traced if freezing conditions are expected to prevent damage to the body and internals.

What is the maximum capacity of the 30A3 model?
Depending on the specific differential pressure, this 3/4" trap can handle condensate loads ranging approximately from 400 to over 2,000 lbs/hr.

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.