Armstrong International 881-3/4-15 Trap

The Armstrong International 881-3/4-15 Trap is a high-performance inverted bucket steam trap engineered for efficient condensate management in low-pressure steam systems. Constructed from rugged ASTM A48 Class 30 cast iron, this model features an integral strainer to protect internal components from dirt and scale, ensuring long-term operational reliability. With a 3/4" NPT connection and a 1/4" orifice, it is specifically configured for a maximum operating pressure of 15 PSI and can handle condensate loads up to 1,060 lbs/hr. The unique free-floating stainless steel leverage system eliminates fixed pivots, reducing friction and wear. Because the discharge orifice is located at the top of the trap, small particles are held in suspension and purged during the discharge cycle, preventing sediment buildup. This industrial steam trap provides continuous air and CO2 venting at steam temperature, preventing air binding and ensuring rapid system start-up and consistent thermal performance.

Key Benefits

• Energy Efficiency: The water-sealed orifice prevents live steam loss, significantly reducing energy waste and operating costs.
• Debris Management: An integral strainer and top-mounted valve design prevent orifice clogging and protect the stainless steel internals.
• Reliability: Heavy-duty construction and a simple, robust mechanical design provide resistance to water hammer and corrosion.
• Easy Maintenance: The 880 Series features a repairable design, allowing for the replacement of internal components without replacing the entire trap body.

Common Questions

• How does an inverted bucket trap handle air venting? The 881-3/4-15 uses a small vent hole in the top of the bucket to provide continuous automatic venting of air and non-condensable gases.
• Can this trap be installed in vertical piping? This specific model is designed for in-line horizontal installation to ensure the bucket mechanism functions correctly.
• What is the benefit of the 1/4" orifice? The 1/4" orifice is precisely sized for 15 PSI service to maximize condensate capacity while maintaining a tight seal against steam.

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.