Armstrong International A21348-1 Gasket

As a veteran tech, you know that reuse of a body seal is a shortcut to a callback. The Armstrong International A21348-1 Gasket is the specific OEM replacement gasket required to maintain a pressure-tight seal on B2 and B3 Series Float & Thermostatic Steam Traps. Precision-cut for the B series steam trap cover, this gasket ensures optimal seating between the body and cap, preventing high-pressure steam leaks that compromise system energy efficiency. Engineered to withstand the thermal cycling common in HVACR industrial steam systems, the A21348-1 facilitates a reliable rebuild when performing routine steam trap maintenance or internal mechanism inspections. Whether you are servicing 15B, 30B, or 175B configurations, using this HVAC replacement part is the only way to ensure the trap operates at its rated steam pressure without bypass or external leakage. Don't risk air binding or water hammer by skipping a fresh seal; keep these in your truck for every F&T trap repair.

• Exact OEM Compatibility: Specifically designed for Armstrong B2 and B3 Series traps, ensuring a perfect fit and reliable leak prevention.
• High-Temperature Durability: Constructed from professional-grade material to handle the rigorous thermal cycling of industrial steam lines.
• Optimized System Performance: Maintains the integrity of the float and thermostatic operation by preventing pressure loss at the cover seal.
• Simplified Maintenance: Direct replacement for part numbers A21348-1 and D2290, reducing downtime during seasonal boiler teardowns.

Which steam trap models use the A21348-1 gasket?
This gasket is the standard cover seal for Armstrong B2 and B3 series F&T traps, including models like the 15-B2 through 175-B3, across various pipe sizes.

Should I replace the gasket during every inspection?
Yes. To ensure a pressure-tight seal, veterans recommend replacing the gasket every time the steam trap cover is removed for cleaning or repair.

Does this part replace the D2290 gasket?
Correct. The A21348-1 is the current technical replacement for the legacy D2290 gasket used in older Armstrong F&T assemblies.

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.