Armstrong International 175A6 1-1/2″ NPT Cast Iron Float & Thermostatic Steam Trap, 175 PSI

Description

The Armstrong International 175A6 is a Series A Cast Iron Float & Thermostatic (F&T) Steam Trap engineered for dependable condensate drainage and air venting in commercial and industrial steam systems. With a standard 1-1/2″ NPT connection and a maximum working pressure of 175 PSI, this trap is built to handle demanding steam distribution applications with consistent, efficient performance.

The integrated thermostatic air vent allows non-condensable gases and air to be purged automatically, promoting faster system warm-up and preventing air binding. The 13/64″ orifice is precision-sized to deliver optimal condensate discharge rates while maintaining steam seal integrity under varying load conditions.

Constructed from durable cast iron, the Series A body provides long service life in harsh steam environments. The float mechanism responds continuously to condensate levels, enabling modulating discharge that prevents steam loss and reduces energy waste — making it an ideal choice for heat exchangers, unit heaters, coils, and similar steam-heated equipment.

Key Features

• Series A Cast Iron Float & Thermostatic (F&T) design
• 1-1/2″ NPT standard connection for straightforward installation
• 175 PSI maximum working pressure rating
• 13/64″ precision-sized orifice for controlled condensate discharge
• Integrated thermostatic air vent for automatic purging of air and non-condensables
• Continuous modulating float action minimizes steam loss
• Cast iron body construction for durability in demanding steam environments

Specifications

• SKU: 175A6
• Brand: Armstrong International
• Connection Size: 1-1/2″ NPT
• Connection Type: Standard (NPT)
• Maximum Working Pressure: 175 PSI
• Orifice Size: 13/64″
• Body Material: Cast Iron
• Series: A
• Trap Type: Float & Thermostatic (F&T)

Applications

• Steam heat exchangers and process heaters
• Unit heaters and cabinet heaters
• Steam coils and air handling units
• Commercial and industrial steam distribution systems
• Drip and tracer steam lines requiring air venting