Armstrong International D506503 Repair Kit

The Armstrong International D506503 Repair Kit, also recognized as the 15B3-CAP-ASSY, is a specialized F&T steam trap repair kit engineered for A2, A3, B2, and B3 float and thermostatic steam traps rated at 15 PSI. This comprehensive cap with mechanism and float assembly permits a full internal overhaul without disturbing the piping, restoring optimal condensate drainage and air venting capabilities. By replacing the entire working mechanism, facility managers can resolve water hammering and steam loss issues in low-pressure steam heating systems. This Armstrong steam trap parts kit features a durable stainless steel float and a thermostatic air vent, ensuring high-efficiency performance and precise modulation. Utilizing OEM steam trap components like the D506503 maintains the integrity of your HVACR system, preventing energy waste and protecting downstream equipment from condensate backup. This 15 PSI steam trap kit is the industry standard for maintaining Armstrong's legendary reliability in commercial and industrial steam applications.

• Complete Internal Overhaul: Includes the cap, mechanism, and float for a total renewal of A and B Series steam traps.
• Seamless Compatibility: Specifically designed for 15 PSI F&T traps, providing a perfect fit for models A2 through B3.
• Reduced Downtime: The 15B3-CAP-ASSY configuration allows for rapid "in-line" servicing, eliminating the need to cut pipe.
• Enhanced Energy Efficiency: Restores the trap's ability to discharge condensate while preventing live steam from escaping.

Common Steam Trap Questions:

How do I know if my Armstrong A2 or B2 trap needs a D506503 repair kit?
If you notice consistent cold radiator symptoms, water hammer, or steam blowing through the return lines, the internal mechanism or float may be compromised. Replacing the cap assembly restores the trap to factory specifications.

Is the D506503 compatible with high-pressure steam systems?
No, this specific kit is optimized for systems with a maximum operating pressure of 15 PSI. Always verify your system's pressure rating before installation.

What is the difference between the D506503 and the 15B3-CAP-ASSY?
They are identical components. The D506503 is the modern part number for the complete 15B3 cap assembly used in Armstrong's float and thermostatic line.

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.