Description
The Armstrong International 15B6 is a Series B Cast Iron Float & Thermostatic (F&T) Steam Trap engineered for reliable, continuous condensate discharge in low-pressure steam heating and process systems. With a robust cast iron body, a 1-1/2″ NPT standard connection, and a maximum operating pressure of 15 PSI, this trap is built to handle the demands of commercial and industrial steam distribution with minimal maintenance.
The float mechanism responds immediately to condensate load, providing modulating, continuous discharge that prevents condensate backup and water hammer. The integrated thermostatic air vent automatically purges non-condensable gases and air at startup and during operation, ensuring efficient heat transfer and protecting downstream equipment.
Key Features
- Series B Cast Iron body for durability in low-to-medium pressure steam service
- 1-1/2″ NPT standard pipe connection for straightforward installation
- 15 PSI maximum operating pressure rating
- 1/2″ orifice for optimized condensate flow capacity
- Integrated thermostatic air vent for automatic purging of air and non-condensable gases
- Float-operated mechanism provides continuous, modulating condensate discharge
- Prevents water hammer and protects heat transfer equipment
Specifications
- SKU: 15B6
- Brand: Armstrong International
- Body Material: Cast Iron
- Connection Size: 1-1/2″ NPT
- Connection Type: Standard (NPT)
- Maximum Operating Pressure: 15 PSI
- Orifice Size: 1/2″
- Trap Type: Float & Thermostatic (F&T)
- Series: Series B
Applications
- Low-pressure steam heating systems
- Commercial and industrial HVAC steam distribution
- Unit heaters, heat exchangers, and coil drainage
- Steam mains and drip legs
- Process equipment requiring continuous condensate removal







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