Armstrong 1/2″ Pipe 250 B894B Model 881

Armstrong 1/2″ Pipe 250 B894B Model 881 Inverted Bucket Steam Trap

The Armstrong 1/2″ Pipe 250 B894B Model 881 is a high-performance inverted bucket steam trap designed for efficient condensate drainage in various steam applications. Constructed from durable cast iron, this steam trap ensures longevity and reliable operation under demanding conditions.

Key Features

• Durable Construction: Made from ASTM A48 Class 30 cast iron, providing robust performance and resistance to wear.
• High Pressure and Temperature Ratings: Operates effectively at pressures up to 250 psig (17 bar) and temperatures up to 450°F (232°C).
• Efficient Condensate Removal: The inverted bucket design ensures continuous drainage, preventing condensate backup and enhancing system efficiency.
• Integral Strainer: Equipped with a built-in strainer to filter out debris, protecting internal components and extending the trap’s lifespan.
• Automatic Air Venting: Features a small vent hole in the bucket for continuous automatic air and CO₂ venting at steam temperature, reducing startup times and improving system performance.
• Resistance to Water Hammer: The design effectively withstands water hammer, ensuring reliable operation in dynamic steam systems.

Technical Specifications

• Connection Size: 1/2″ NPT
• Maximum Operating Pressure: 250 psig (17 bar)
• Maximum Operating Temperature: 450°F (232°C)
• Condensate Capacity: Up to 4,400 lb/hr (2,000 kg/hr)
• Body Material: Cast Iron (ASTM A48 Class 30)
• Internal Components: All stainless steel—304
• Valve and Seat: Hardened chrome steel—17-4PH

The Armstrong Model 881 steam trap is engineered for horizontal installation and is suitable for a wide range of steam applications, including heating systems, process equipment, and other industrial uses. Its repairable design allows for easy maintenance, contributing to lower operational costs and extended service life.