Armstrong International 881-3/4-125 Trap

The Armstrong International 881-3/4-125 is a high-performance inverted bucket steam trap engineered for reliable condensate removal in industrial steam systems. Constructed with a rugged cast iron body and featuring an integral strainer, this Series 881 trap is designed for horizontal in-line installation. It operates at a maximum pressure of 125 PSI and utilizes a precision-ground 1/8" orifice to maintain peak efficiency. The unique inverted bucket mechanism provides a self-scrubbing action that prevents dirt accumulation on the discharge orifice, ensuring long-term operational stability. With its 3/4" NPT connections and stainless steel internals, this model resists water hammer and corrosion, making it a preferred choice for laundry equipment and high-pressure drip locations. By facilitating continuous automatic air and CO2 venting at steam temperature, the Armstrong 881 minimizes energy loss while maximizing the performance of your HVACR and process equipment. This repairable unit offers superior resistance to wear without the need for complex linkages.

Key Benefits

• Industrial Durability: Robust cast iron construction with stainless steel internals for extended service life in demanding environments.
• Energy Efficiency: The water-sealed discharge orifice prevents live steam loss, significantly reducing facility energy costs.
• Integrated Protection: An integral strainer protects the 1/8" orifice from scale and sediment, reducing the frequency of maintenance.
• Water Hammer Resistance: The inverted bucket design is inherently resistant to hydronic shock and system pressure fluctuations.
• Simplified Maintenance: Fully repairable design allows for easy inspection and parts replacement without removing the trap from the line.

Common Questions

How do I know if my Armstrong 881 steam trap has failed?
A failing trap may be "cold" if blocked by dirt or "hot" with live steam blowing through if the seat is worn. Regular testing by observing discharge or using ultrasonic equipment is recommended to confirm the 3/4" NPT trap is cycling correctly.

Can this trap handle air binding in my steam system?
Yes, the Armstrong International 881 features a small vent hole in the bucket that provides continuous automatic air and CO2 venting at steam temperature, preventing air binding and ensuring rapid system warm-up.

Is the Armstrong 881 suitable for horizontal or vertical piping?
The Series 881 is specifically designed for in-line horizontal installation. For vertical piping configurations, alternative Armstrong models should be selected to ensure the inverted bucket functions properly.

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.