Armstrong International 15B2 Trap

The Armstrong International 15B2 is a rugged, 1/2" NPT Series B float and thermostatic steam trap engineered for high-efficiency condensate drainage in low-pressure steam systems. Featuring a durable cast iron body and a 7/32" orifice, this F&T trap is designed to handle a maximum operating pressure of 15 PSI. It utilizes a high-leverage valve mechanism and a balanced pressure thermostatic air vent to ensure immediate discharge of air and non-condensable gases, preventing steam system air binding. The 15B2 is specifically built for modulating loads, making it an ideal choice for HVAC unit heaters, heat exchangers, and drip leg applications where continuous drainage is mandatory. The internal stainless steel float and valve assembly are designed for vertical installation, ensuring reliable performance under fluctuating condensate loads without losing the steam seal.

Key Benefits for Contractors:

• Continuous Condensate Discharge: The float-operated mechanism responds immediately to condensate level changes for stable heat transfer.
• Superior Air Handling: The integrated thermostatic air vent handles large volumes of air during startup and operation to prevent cold spots.
• Ease of Service: The Series B design allows for internal component inspection and maintenance without breaking pipe connections.
• Robust Construction: The ASTM A48 Class 30 cast iron housing provides the structural integrity needed for demanding mechanical rooms.

Common Questions:

Can the Armstrong 15B2 be used on high-pressure steam mains?
No, this specific model is rated for a maximum differential pressure of 15 PSI. Using it in high-pressure applications will cause the float to collapse or fail to open against the seat pressure.

Why is air venting critical in an F&T trap like the 15B2?
Air acts as an insulator; if not purged via the thermostatic vent, it remains trapped in the heat exchanger, significantly reducing the heating capacity of the equipment.

Is this trap suitable for outdoor installation?
While the cast iron body is durable, F&T traps are susceptible to freezing if condensate remains in the body during shutdown. Proper insulation or tracing is required for outdoor technical environments.

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.