Armstrong Fluid Technology 116435MF-132 Pump

The Armstrong Fluid Technology 116435MF-132 is a high-performance three-piece circulator pump designed for reliable fluid circulation in commercial and residential hydronic heating systems. As the updated maintenance-free version of the 116435-132, this H52BF model features a robust 1/3 HP, 115V single-phase motor equipped with built-in thermal overload protection to ensure long-term operational safety. Its cast iron body and non-ferrous impeller construction provide exceptional durability and resistance to internal corrosion. Engineered with permanently lubricated bearings, this in-line circulator pump eliminates the need for periodic oiling, reducing maintenance overhead. The radially-split body design allows for easy "back pull-out" servicing, enabling technicians to replace wear components without disconnecting the main piping. Designed for use with 1 1/4" flanges, this pump is a preferred choice for HVAC professionals seeking a dependable, energy-efficient circulator for multi-stage zoning and cooling applications.

Key Benefits

• Maintenance-Free Operation: Features permanently lubricated ball bearings that eliminate the need for manual lubrication.
• Service-Friendly Design: The 3-piece modular construction with a radially-split body allows for repair without removing the pump from the line.
• Enhanced Protection: Includes integrated thermal overload protection to prevent motor burnout during demanding cycles.
• Quiet Performance: The non-ferrous impeller and precision-balanced motor ensure smooth, low-noise fluid delivery.
• Direct Replacement: This is the official modernized update for the legacy 116435-132 H52 model.

Common Questions

Can this pump be used for potable (drinking) water?
No, since this model features a cast iron body, it is intended for closed-loop hydronic heating and cooling. For potable water systems, a lead-free bronze or stainless steel model is required.

Does it come with the necessary flanges for installation?
The pump is designed for use with 1 1/4" flanged connections. Please verify if your specific installation requires new gaskets or hardware to match the existing piping.

Is this pump compatible with older H-52 series setups?
Yes, the 116435MF-132 is the updated "Maintenance Free" alternative for the older H-52 (116435-132) series, offering the same physical footprint for easy retrofitting.

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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