
Armstrong Fluid Technology 110108MF-397 Bearing Assembly
The Armstrong Fluid Technology 110108MF-397 Bearing Assembly is a high-performance, all-in-one replacement kit designed specifically for Series S and H in-line circulators. As a critical evolution in HVAC pump repair parts, this maintenance-free bearing assembly (SBA) eliminates the need for manual oiling or periodic greasing, significantly reducing operational downtime. This genuine OEM pump replacement kit includes a 4.5-inch centrifugal impeller, a durable coupler, and a specialized Viton seal bearing assembly to ensure superior resistance to heat and chemicals. Engineered for seamless integration, the 110108MF-397 serves as the direct updated version for the legacy 110108-397 model. By upgrading to this assembly, facility managers and technicians can restore the entire rotating unit of their hydronic heating systems with a components-matched set that ensures long-term reliability and noise-free operation in demanding commercial and industrial environments.
Key Benefits:
- Maintenance-Free Operation: Features permanently lubricated ball bearings that eliminate the requirement for periodic oiling.
- Complete Rotating Unit: Includes the bearing assembly, 4.5" plastic impeller, and coupler for a comprehensive system overhaul.
- Superior Sealing: Equipped with a high-grade Viton seal and sintered silicon carbide surfaces to prevent leaks under high-temperature fluctuations.
- Universal Compatibility: Designed as a direct drop-in replacement for 110108-397 and various Bell & Gossett models for versatile application.
- Enhanced Durability: Robust 3-piece modular design supports an extended service life in both heating and cooling hydronic loops.
Common Questions:
Is the 110108MF-397 compatible with my older Armstrong S-25 pump?
Yes, this assembly is designed as a modular replacement for several 5 Series models. It is frequently used to upgrade older sleeve-bearing designs to the modern maintenance-free standard without requiring pipe modifications.
Does this kit include the gasket needed for installation?
While this kit provides the primary rotating components such as the bearing assembly, impeller, and coupler, we recommend verifying if a separate volute gasket is required for your specific pump housing during reassembly.
Can I use this assembly in a domestic potable water system?
This specific model is typically used in closed-loop HVAC systems. For domestic hot water or fresh water systems, please confirm if your application requires a lead-free bronze construction variant.
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.
This item is not eligible for free shipping.
Armstrong Fluid Technology 110108MF-397 Bearing Assembly
The Armstrong Fluid Technology 110108MF-397 Bearing Assembly is a high-performance, all-in-one replacement kit designed specifically for Series S and H in-line circulators. As a critical evolution in HVAC pump repair parts, this maintenance-free bearing assembly (SBA) eliminates the need for manual oiling or periodic greasing, significantly reducing operational downtime. This genuine OEM pump replacement kit includes a 4.5-inch centrifugal impeller, a durable coupler, and a specialized Viton seal bearing assembly to ensure superior resistance to heat and chemicals. Engineered for seamless integration, the 110108MF-397 serves as the direct updated version for the legacy 110108-397 model. By upgrading to this assembly, facility managers and technicians can restore the entire rotating unit of their hydronic heating systems with a components-matched set that ensures long-term reliability and noise-free operation in demanding commercial and industrial environments.
Key Benefits:
- Maintenance-Free Operation: Features permanently lubricated ball bearings that eliminate the requirement for periodic oiling.
- Complete Rotating Unit: Includes the bearing assembly, 4.5" plastic impeller, and coupler for a comprehensive system overhaul.
- Superior Sealing: Equipped with a high-grade Viton seal and sintered silicon carbide surfaces to prevent leaks under high-temperature fluctuations.
- Universal Compatibility: Designed as a direct drop-in replacement for 110108-397 and various Bell & Gossett models for versatile application.
- Enhanced Durability: Robust 3-piece modular design supports an extended service life in both heating and cooling hydronic loops.
Common Questions:
Is the 110108MF-397 compatible with my older Armstrong S-25 pump?
Yes, this assembly is designed as a modular replacement for several 5 Series models. It is frequently used to upgrade older sleeve-bearing designs to the modern maintenance-free standard without requiring pipe modifications.
Does this kit include the gasket needed for installation?
While this kit provides the primary rotating components such as the bearing assembly, impeller, and coupler, we recommend verifying if a separate volute gasket is required for your specific pump housing during reassembly.
Can I use this assembly in a domestic potable water system?
This specific model is typically used in closed-loop HVAC systems. For domestic hot water or fresh water systems, please confirm if your application requires a lead-free bronze construction variant.
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.
This item is not eligible for free shipping.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Armstrong Fluid Technology 110108MF-397 Bearing Assembly is a high-performance, all-in-one replacement kit designed specifically for Series S and H in-line circulators. As a critical evolution in HVAC pump repair parts, this maintenance-free bearing assembly (SBA) eliminates the need for manual oiling or periodic greasing, significantly reducing operational downtime. This genuine OEM pump replacement kit includes a 4.5-inch centrifugal impeller, a durable coupler, and a specialized Viton seal bearing assembly to ensure superior resistance to heat and chemicals. Engineered for seamless integration, the 110108MF-397 serves as the direct updated version for the legacy 110108-397 model. By upgrading to this assembly, facility managers and technicians can restore the entire rotating unit of their hydronic heating systems with a components-matched set that ensures long-term reliability and noise-free operation in demanding commercial and industrial environments.
Key Benefits:
- Maintenance-Free Operation: Features permanently lubricated ball bearings that eliminate the requirement for periodic oiling.
- Complete Rotating Unit: Includes the bearing assembly, 4.5" plastic impeller, and coupler for a comprehensive system overhaul.
- Superior Sealing: Equipped with a high-grade Viton seal and sintered silicon carbide surfaces to prevent leaks under high-temperature fluctuations.
- Universal Compatibility: Designed as a direct drop-in replacement for 110108-397 and various Bell & Gossett models for versatile application.
- Enhanced Durability: Robust 3-piece modular design supports an extended service life in both heating and cooling hydronic loops.
Common Questions:
Is the 110108MF-397 compatible with my older Armstrong S-25 pump?
Yes, this assembly is designed as a modular replacement for several 5 Series models. It is frequently used to upgrade older sleeve-bearing designs to the modern maintenance-free standard without requiring pipe modifications.
Does this kit include the gasket needed for installation?
While this kit provides the primary rotating components such as the bearing assembly, impeller, and coupler, we recommend verifying if a separate volute gasket is required for your specific pump housing during reassembly.
Can I use this assembly in a domestic potable water system?
This specific model is typically used in closed-loop HVAC systems. For domestic hot water or fresh water systems, please confirm if your application requires a lead-free bronze construction variant.
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.
This item is not eligible for free shipping.












