Description
The Armstrong International 30A3 is a Series A Cast Iron Float & Thermostatic (F&T) Steam Trap engineered for reliable, continuous condensate discharge in a wide range of commercial and industrial steam heating applications. With a standard 3/4″ NPT connection and a 30 PSI pressure rating, this trap handles moderate-pressure steam systems with ease, making it an ideal choice for unit heaters, heat exchangers, coils, and similar equipment.
Key Features
- Series A cast iron body construction for durability and long service life
- 3/4″ NPT standard inlet and outlet connections for straightforward installation
- 30 PSI maximum allowable pressure (MAP) rating
- 1/4″ orifice for precise, efficient condensate flow control
- Integrated thermostatic air vent automatically purges non-condensable gases and air on startup, improving system efficiency
- Float & thermostatic operating principle ensures continuous, modulating condensate discharge without steam loss
- Cast iron body resists corrosion and withstands the thermal cycling demands of steam systems
How Float & Thermostatic Traps Work
F&T steam traps use a float mechanism to discharge condensate continuously as it accumulates, while the integrated thermostatic element opens to vent air and non-condensable gases. This dual-action design prevents air binding, reduces warm-up times, and maintains consistent system performance throughout the operating cycle.
Typical Applications
- Unit heaters and cabinet unit heaters
- Steam coils and heat exchangers
- Process heating equipment
- Commercial and light industrial steam distribution systems
- HVAC steam heating systems operating at or below 30 PSI
Specifications
- SKU: 30A3
- Brand: Armstrong International
- Series: A
- Body Material: Cast Iron
- Connection Size: 3/4″ NPT
- Connection Type: Standard (NPT threaded)
- Maximum Allowable Pressure: 30 PSI
- Orifice Size: 1/4″
- Air Vent: Thermostatic air vent included
- Trap Type: Float & Thermostatic (F&T)
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