Armstrong 110116MF-306 S-55 LV Pump Less Volute

Description

Replace a worn hydronic motor with Armstrong 110116MF-306 S-55 LV, a 1/2 HP single-phase pump assembly supplied without its volute. The package includes the motor, Standard Sealed Bearing Assembly, and impeller, making it a practical repair option when the existing casing remains sound and the four-bolt mounting pattern matches. Confirm the volute, shaft fit, impeller clearance, and bolt circle before ordering. This is a replacement assembly, not a complete pump with casing.

The motor accepts 115 or 230 V power and uses permanently lubricated construction for routine service reduction. An alloy-steel shaft with copper sleeve works with the BUNA-N mechanical seal, while the SBA supports alignment within a compatible commercial circulator. The supplied data does not state flow, head, pressure, amp draw, or volute dimensions, so compare the original nameplate and pump curve before installation.

Key Features & Benefits

• ⚙️ Less-Volute Assembly: Includes the motor, SBA, and impeller for faster repair work when the existing casing can be reused.
• 🔌 Dual-Voltage Motor: Supports 115/230 V service for flexible replacement wiring in commercial hydronic systems.
• 🛠️ Sealed Bearing Assembly: Standard SBA construction provides consistent shaft support during circulation.
• 🔩 4-Bolt Mounting Pattern: Matches compatible circular pump assemblies for simpler alignment during installation.
• 🧲 Alloy-Steel Shaft: Copper sleeve construction helps provide stable rotating service inside the pump assembly.
• 🧴 Permanently Lubricated: Reduces routine lubrication tasks and supports lower maintenance demand.

Why Choose Armstrong 110116MF-306 S-55 LV?

The S-55 LV is intended for repair situations where replacing the entire pump would create unnecessary piping work. Reusing a serviceable volute can reduce labor, but dimensional and hydraulic matching must be confirmed first.

• Build: Alloy-steel shaft, copper sleeve, BUNA-N mechanical seal, and SBA components provide defined replacement details; enclosure rating was not supplied.
• Value: A compatible less-volute assembly can reduce drainage, pipe disturbance, and service time compared with a complete pump replacement.
• Audience: Suited to commercial hydronic contractors, boiler technicians, facility engineers, and pump repair specialists.

Applications & Use Cases

Use Armstrong 110116MF-306 S-55 LV for standard commercial hydronic loops and boiler system repair where the original volute remains serviceable. Overall dimensions, unit weight, port reach, and volute measurements were not provided, so verify shaft length, impeller clearance, bolt spacing, wiring access, and motor orientation before installation.

Warranty & Support

• 1-Year Limited Warranty, subject to Armstrong’s applicable terms, installation requirements, and authorized service procedures.
• Confirm compatibility between the replacement motor assembly, existing volute, impeller, shaft, and mounting pattern.

Isolate power, drain the affected loop, inspect the reused volute for cracks and erosion, clean the shaft seat, and replace damaged gaskets before assembly. After startup, purge air and check for seal leakage, rubbing, abnormal noise, and vibration. Purchase the Armstrong 110116MF-306 S-55 LV less-volute hydronic pump assembly through the store domain associated with this listing for authentic equipment, 1-Year Limited Warranty coverage, and pump support.