Armstrong International B1671-5 Pressure Change Assembly

The Armstrong International B1671-5 Pressure Change Assembly is a high-performance steam trap repair kit engineered to restore the mechanical efficiency of your industrial steam system. This pressure change assembly (PCA) features a precision-machined 1/4" orifice, specifically designed for inverted bucket traps operating at a maximum pressure of 125 psi. By replacing the internal bucket mechanism, you ensure the frictionless operation of the free-floating stainless steel lever, which is critical for effective condensate drainage and air venting. This kit is a direct replacement for Armstrong 200, 300, 400, 800, and 900 series traps, including popular models like the 213, 312, 813, and 983. Utilizing durable, corrosion-resistant stainless steel components and a hardened chrome steel valve and seat, this assembly minimizes steam loss and prevents air binding. Maintaining your steam trap internals with authentic Armstrong International parts improves system heat transfer and significantly reduces energy costs by eliminating live steam bypass.

Key Benefits

• Universal Compatibility: Engineered for a wide range of models including the 213, 312, 313, 413, 813, TVS-813, 883, and 983 series.
• Optimal Fluid Control: The 1/4" discharge orifice is sized for 125 psi applications to provide balanced condensate removal without steam wastage.
• Frictionless Design: Features a free-floating guided lever mechanism that eliminates fixed pivots, reducing internal wear and extending service life.
• Enhanced Durability: Constructed with 304 stainless steel internals and 17-4PH hardened chrome steel for maximum resistance to water hammer and corrosion.
• Energy Efficiency: Maintains a tight water seal around the orifice to prevent the loss of live steam, optimizing your boiler system's performance.

Common Questions

What is included in the B1671-5 Pressure Change Assembly kit?
This kit typically includes the bucket mechanism, the valve, valve lever, and the associated seat/orifice assembly required to rebuild the internal "guts" of the compatible inverted bucket trap.

How do I know if my steam trap needs a new 1/4" orifice assembly?
Common signs of failure include the trap "blowing live steam," failing to discharge condensate (causing backup), or visible erosion on the existing valve and seat surfaces during inspection.

Can this kit be used for higher pressure ratings?
No, the B1671-5 is specifically calibrated with a 1/4" orifice for 125 psi operation. Using it in systems with higher pressure may prevent the trap from opening against the differential pressure.

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.