Armstrong International 811-3/4-30 Trap

The Armstrong International 811-3/4-30 is a high-performance inverted bucket steam trap engineered for superior condensate drainage in industrial and commercial steam systems. Featuring a rugged cast iron body and a 3/4" NPT connection, this Series 811 steam trap is designed to handle pressures up to 30 PSI with a precision-engineered 3/16" orifice. Unlike other designs, the inverted bucket mechanism provides exceptional resistance to water hammer and operates efficiently even in the presence of non-condensable gases. Ideally suited for HVAC steam heating and process equipment, this unit ensures maximum thermal efficiency by preventing steam loss while providing continuous air venting. By maintaining a water seal at the bottom of the bucket, the 811-3/4-30 offers localized condensate removal that reduces system-wide energy costs and protects downstream piping from corrosion and erosion.

• Exceptional Durability: Heavy-duty cast iron construction ensures reliable performance in demanding environments.
• Energy Efficiency: The inverted bucket design minimizes steam loss, significantly lowering operational overhead.
• Water Hammer Resistance: Unique internal mechanism withstands pressure surges that often damage lesser traps.
• Self-Cleaning Action: The continuous flow of condensate through the orifice helps prevent the buildup of dirt and scale.

Is the Armstrong 811 suitable for low-pressure steam systems?
Yes, the 811-3/4-30 is specifically calibrated for systems operating at or below 30 PSI, making it an excellent choice for low-pressure heating applications.

How does this trap handle air and non-condensable gases?
The inverted bucket steam trap features a small vent hole in the top of the bucket, allowing air to pass through and be discharged ahead of the condensate.

Can the 811-3/4-30 be installed in vertical piping?
The Series 811 is designed for horizontal installation to ensure the bucket mechanism functions correctly and maintains the required water seal.

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.