Armstrong International 811-1-15 Trap

The Armstrong International 811-1-15 Trap is a premier 1" NPT steam trap engineered for reliable condensate removal in low-pressure steam systems. Built with a rugged ASTM A48 Class 30 cast iron body, this inverted bucket steam trap features a 1/4" orifice specifically designed to handle a maximum allowable pressure of 15 PSI. By utilizing a simple yet effective mechanical leverage system, the Series 811 steam trap ensures immediate discharge of air and non-condensable gases, preventing air binding and optimizing heat transfer efficiency across HVAC steam heating applications. Its unique design provides excellent water hammer resistance and high dirt-handling capacity, making it a dependable choice for industrial and commercial environments seeking to reduce energy loss. This Armstrong steam trap maintains a water seal at the bottom of the bucket to prevent live steam loss, ensuring consistent performance even under varying load conditions.

• Enhanced Efficiency: Efficiently removes condensate and air to maximize heat exchanger performance.
• Durable Construction: High-quality cast iron housing ensures long-term structural integrity in demanding environments.
• Water Hammer Resistance: Advanced internal design provides superior protection against sudden pressure surges.
• Low Maintenance: Features corrosion-resistant stainless steel internals for extended service life without frequent intervention.
• Venting Capability: Automatically vents air and CO2 at steam temperature to prevent corrosion.

Common Questions

How do I select the correct orifice size for my steam system?
Orifice selection depends on the peak condensate load and the maximum differential pressure. The 1/4" orifice in this model is optimized for 15 PSI applications where high flow capacity is required at lower pressures.

Can the 811-1-15 trap be installed in vertical piping?
No, inverted bucket steam traps like the Series 811 must be installed in a horizontal orientation with the bucket upright to function correctly and maintain the water seal.

What are the benefits of using a 1" NPT connection?
The 1 inch NPT connection provides high-volume throughput and compatibility with standard heavy-duty steam piping, reducing flow restrictions in industrial heating loops.

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.