Xylem 402011 Hoffman 17C Straightaway 3/4" Thermostatic Steam Trap

The Xylem 402011 is a Hoffman 17C-S-3-25 straightaway pattern thermostatic steam trap with 3/4" NPT connections, designed to reduce start-up times and improve overall efficiency in steam heating systems. This type of trap is small, simple in construction, size and weight, and has adequate capacity for various applications, especially in low-pressure heating systems.

How It Works:

Balanced pressure thermostatic traps use a special bellows diaphragm that is designed to open in response to pressure and temperature to discharge air and condensate, and to close against passage of steam. Thermostatic traps are normally open allowing fast venting of air during start-up, and cold condensate drains through the trap until temperatures reach 10° to 30°F of saturation, at which point the thermostatic bellows element closes the trap.

Key Features:

• 3/4" NPT straightaway pattern configuration for inline installation
• 25 PSI maximum operating pressure
• Opens at 10° to 30°F below saturated steam temperature for the existing pressure
• Brass body construction for durability and corrosion resistance
• Stainless steel internal components for long service life
• Compact design ideal for space-limited installations

Applications:

The Hoffman 17C series thermostatic trap is ideal for radiators, convectors, unit heaters, and other low-pressure steam heating applications where efficient condensate removal and air venting are critical for system performance.