Armstrong International 15B3 Connection

The Armstrong International 15B3 is a high-performance Series B cast iron float and thermostatic steam trap designed for industrial and commercial heating systems. Featuring a 3/4 inch NPT connection and a precision-engineered 7/32 inch orifice, this unit is optimized for systems with a maximum operating pressure of 15 PSI. It excels at modulating steam loads, ensuring the continuous drainage of condensate while the integrated thermostatic air vent rapidly handles non-condensable gases and air. This dual-action mechanism prevents air binding and optimizes heat transfer efficiency across HVAC steam coils and heat exchangers. Built with a rugged cast iron body and durable stainless steel internal components, the 15B3 connection provides superior resistance to wear and corrosion in demanding environments. By maintaining a constant water seal, it prevents live steam loss, significantly improving the energy efficiency of your low-pressure steam process piping.

• Reliable Condensate Drainage: The float mechanism responds instantly to condensate levels, providing immediate discharge without steam loss.
• Efficient Air Venting: The balanced pressure thermostatic air vent ensures fast start-ups by purging air during the initial heating cycle.
• Heavy-Duty Construction: A robust ASTM A48 Class 30 cast iron housing ensures structural integrity in low-pressure steam systems.
• In-Line Maintenance: Designed for easy access to internal parts, allowing for simplified inspection and cleaning without disturbing piping.

What is the maximum capacity of the Armstrong 15B3?
The 15B3 is rated for low-pressure applications up to 15 PSI, with flow capacities varying based on the differential pressure across the 7/32 inch orifice.

Can this steam trap be used in outdoor installations?
While the cast iron Series B is durable, it is primarily intended for indoor applications or protected environments where freezing of the condensate is not a risk.

Is the thermostatic air vent replaceable?
Yes, the internal bellows-style air vent is a modular component that can be serviced or replaced to maintain optimal venting performance.

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.