Armstrong 110108MF-680 Raypak 4MF Raypak Tip Boiler Pump

Description

Built with a Viton seal, Armstrong 110108MF-680 Raypak 4MF supports high-temperature boiler circulation through commercial heat-exchange systems. Its 1 HP single-phase motor runs at 1725 RPM, while the non-ferrous composite impeller and Raypak or Laars flange compatibility suit specified boiler-header replacement work. This listing includes the pump less volute, so verify the mating volute, flange pattern, system fill, and rotation before startup.

The Raypak 4MF accepts 115 V or 208 to 230 V single-phase service and uses a maintenance-free sealed bearing assembly. The high-temperature Viton seal supports approved hot-water conditions, while the composite impeller handles circulation through the boiler loop. Verified data does not provide GPM, maximum head, amp draw, physical dimensions, port reach, pressure-switch settings, or self-priming capability, so match the replacement to the existing system curve and motor nameplate.

Key Features of Armstrong 110108MF-680 Raypak 4MF

• 1 HP commercial boiler pump for high-capacity header circulation.
• Single-phase motor accepts 115 V or 208 to 230 V service, subject to nameplate verification.
• 1725 RPM operating speed suits commercial heat-exchange circulation.
• Non-ferrous high-temperature composite impeller supports boiler-loop service.
• Viton mechanical seal suits approved high-temperature water applications.
• Maintenance-free sealed bearing assembly reduces routine lubrication work.
• Raypak and Laars flange compatibility supports specified replacement applications.
• Pump is supplied less volute; flow, head, amp draw, dimensions, port reach, pressure control, and warranty terms require confirmation.

Why the Armstrong 110108MF-680 Raypak 4MF Stands Out

This Armstrong high-temperature boiler pump combines a 1 HP single-phase drive with Viton sealing, a non-ferrous impeller, and established Raypak and Laars flange compatibility.

• Build: The composite impeller, Viton seal, and sealed bearing assembly target hot-water circulation, while the less-volute configuration requires exact replacement-part verification.
• Value: Sealed bearings reduce lubrication tasks, and correct voltage selection helps limit overheating, nuisance trips, and boiler-header downtime.
• Audience: Boiler contractors, Raypak service technicians, Laars installers, commercial facility engineers, and mechanical-room replacement teams can use this pump where the flange pattern and hydraulic curve match.

Applications & Use Cases

Apply the Armstrong 110108MF-680 Raypak 4MF to commercial boiler headers, rapid heat-exchange circuits, and high-temperature hydronic systems that match the approved flange pattern and pump curve. Physical dimensions, unit weight, and discharge or suction port reach were not included, so verify the replacement envelope, volute fit, flange alignment, motor clearance, wiring space, and lifting access before removing the existing pump.

Warranty & Support

• Factory warranty terms were not included in the supplied product data. Confirm coverage, volute compatibility, installation conditions, and authorized replacement support before purchase.
• Check the mechanical seal for weeping, purge air from the boiler loop, inspect strainers, confirm voltage selection, and verify flange alignment during commissioning.

Keep the pump flooded, confirm fluid temperature and chemistry, and inspect the sealed bearing assembly and flange joints during scheduled boiler service. Purchase the Armstrong 110108MF-680 Raypak 4MF high-temperature boiler pump from [store domain] for authentic equipment, applicable factory warranty protection, and pump support.