Armstrong International 811-3/4-250 Trap

The Armstrong International 811-3/4-250 is a heavy-duty Series 811 cast iron inverted bucket steam trap engineered for superior condensate management in demanding industrial steam systems. This 3/4" NPT steam trap is designed for horizontal installation and features a robust 250 PSI maximum operating pressure rating, making it an ideal choice for high-pressure drip, tracer, and process applications. Utilizing a high-leverage, free-floating stainless steel mechanism, this inverted bucket trap provides reliable, continuous air and CO2 venting at steam temperature without the risk of air binding. The precision-engineered #38 orifice ensures efficient discharge while the internal water seal effectively prevents live steam loss, maximizing energy efficiency. Its durable ASTM A48 Class 30 cast iron body is built to withstand water hammer and hydronic shock, significantly reducing replacement and labor costs over time. This repairable unit offers long-term maintenance savings, as internal components can be serviced without removing the trap from the line, ensuring your steam equipment operates at peak performance.

• Enhanced Energy Efficiency: The inverted bucket design provides a tight water seal that prevents live steam loss during operation.
• Superior Durability: Constructed with a cast iron body and corrosion-resistant stainless steel internals to resist wear and hydronic shock.
• Dirt Handling Capabilities: The discharge orifice is located at the top, allowing small particles to be held in suspension and purged during the discharge cycle.
• Continuous Air Venting: Automatically vents air and non-condensable gases at steam temperature to prevent CO2 corrosion and air binding.
• Field Repairable: Designed for easy maintenance, allowing for internal parts replacement while the trap remains in the piping system.

• Can this trap handle high back pressure? Yes, the Armstrong 811 series is known for excellent performance against back pressure, which only reduces capacity by the low differential.
• Is this steam trap resistant to water hammer? Absolutely. The inverted bucket is open at the bottom, which makes it inherently resistant to damage from sudden hydraulic shocks.
• What are the primary applications for the Series 811? It is most commonly used in industrial laundry equipment, high-pressure drip locations, and various steam process heat exchangers.

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.