Armstrong 410135-240 Circulating Pump 707S Bronze Impeller

Open-loop industrial systems use Armstrong 410135-240 707S for secondary boiler circulation and compatible non-potable service. Its 1/2 HP, 115 V single-phase motor operates at 1725 RPM through a cast iron body with a bronze impeller and bronze sleeve. Confirm the 225°F temperature limit, water chemistry, system curve, and maintenance requirements before startup.

The Armstrong Series 700 707S Bronze Fitted uses a modular three-piece design with an alloy steel shaft and bronze sleeve. Its oil-lubricated sleeve bearings require scheduled service, while verified data does not include GPM, maximum head, amp draw, seal material, connection size, dimensions, weight, thermal protection, or self-priming capability. Match the pump to the secondary-loop duty point and confirm that the fluid is non-potable as specified.

Key Features of Armstrong 410135-240 707S Bronze Impeller

- 1/2 HP motor supports secondary boiler loops and open-loop industrial systems.
- 115 V single-phase operation suits compatible commercial heating circuits.
- 1725 RPM operation supports the specified Series 700 circulation configuration.
- Cast iron body provides a rigid housing for industrial hydronics.
- Bronze impeller supports compatible non-potable fluid circulation applications.
- Alloy steel shaft with bronze sleeve protects the rotating assembly.
- Modular three-piece construction supports service access and component replacement.
- Oil-lubricated sleeve bearings require periodic maintenance according to approved instructions.
- 225°F maximum operating temperature supports compatible heating-loop conditions.

Why Choose Armstrong 410135-240 707S Bronze Impeller

This Armstrong bronze-fitted circulator combines serviceable construction with single-phase power for secondary boiler loops.

- Build: Cast iron, bronze impeller, bronze sleeve, and modular construction support compatible industrial circulation.
- Value: Standard voltage and serviceable components can simplify replacement planning for secondary heating systems.
- Audience: Boiler contractors, industrial HVAC technicians, hydronic installers, facility engineers, and maintenance teams can specify this model.

Applications & Use Cases

Use the Armstrong 410135-240 707S for secondary boiler loops, non-potable open-loop industrial systems, commercial heating, and compatible hydronic circulation. Physical dimensions, unit weight, and connection reach were not supplied, so verify pipe spacing, valve clearance, oiling access, motor wiring, lifting room, and service clearance before installation.

Warranty & Support

- Warranty: Armstrong USA general terms provide 12 months from installation, not exceeding 18 months from shipment, for applicable non-E.2 products.
- Confirm fluid chemistry, purge trapped air, lubricate sleeve bearings, inspect the bronze sleeve, and verify rotation during commissioning.

Clean strainers, monitor the cast iron body for leakage, and inspect the impeller, sleeve, and bearings during scheduled service. Purchase the Armstrong 410135-240 707S bronze impeller circulation pump from Mulmotor.com for authentic equipment, applicable factory warranty protection, and pump support.