Armstrong Fluid Technology 818254-003K Assembly kit

The Armstrong Fluid Technology 818254-003K Assembly kit represents a significant upgrade in hydronic system maintenance, serving as the high-performance maintenance-free bearing assembly for Armstrong S-25 series circulators. This SBA-MF-2 module is engineered to be a direct replacement for 810119-001 and 810119MF-001 models, ensuring a seamless transition for legacy systems. The kit arrives as a comprehensive HVAC pump repair kit, featuring a stainless steel shaft, a durable Noryl impeller, and an EPDM/sintered silicon carbide seal. By integrating permanently lubricated ball bearings, this Seal Bearing Assembly kit eliminates the need for manual oiling, significantly reducing long-term operational costs. Whether you are addressing a leaking pump seal or a noisy circulator motor, this factory-balanced assembly restores efficiency and provides a reliable, tight seal for your hydronic heating system.

Key Benefits

• Maintenance-Free Reliability: Features permanently lubricated ball bearings that eliminate the requirement for routine oiling.
• Comprehensive Solution: Includes the Noryl impeller, pump body gasket, and high-grade mechanical seal for a complete overhaul.
• Universal Compatibility: Specifically engineered for Armstrong S-25 pumps (covering 3/4" to 1-1/2" sizes) and is compatible with select Bell & Gossett models.
• Enhanced Durability: Utilizes a stainless steel shaft and a sintered silicon carbide seal to resist corrosion and wear.
• Easy Installation: Pre-assembled module design minimizes downtime during critical HVAC repairs.

Common Questions

How do I know if I need a new SBA-MF assembly?
If your circulator pump is exhibiting physical leaks around the shaft or producing a high-pitched grinding noise, the internal bearings or mechanical seals have likely failed. Replacing the entire assembly with the 818254-003K is the recommended professional fix.

Can I use this to replace the old 810119-001 oil-lubricated model?
Yes. The 818254-003K is the official direct replacement for 810119-001. It upgrades your pump to a maintenance-free design without requiring piping modifications.

Does this kit include the gasket?
Yes, the assembly kit includes the necessary pump body gasket to ensure a leak-proof fit upon installation.

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.

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