Bell & Gossett Series 1531 Model 1-1/2AC Pump 7-1/2 HP 3500 RPM Motor

Compact high-pressure systems use Bell & Gossett Series 1531 Model 1-1/2AC for commercial HVAC boosting and close-coupled circulation. This 7.5 HP three-phase pump operates at 3500 to 3550 RPM, with a 2-inch suction, 1.5-inch discharge, and space-saving footless configuration. Confirm the high-speed pump curve, motor voltage, phase rotation, suction conditions, and pipe support before startup.

The Bell & Gossett Series 1531 1.5AC uses a NEMA JM close-coupled motor frame and a 1.5AC case for compact high-pressure service. Its footless design supports space-conscious installations, while the 2-inch suction and 1.5-inch discharge connections fit the specified case. Verified data does not include voltage, amp draw, GPM, maximum head, impeller material, seal type, operating temperature, dimensions, weight, thermal protection, or self-priming capability, so follow the approved system curve.

Key Features of Bell & Gossett Series 1531 Model 1-1/2AC

- 7.5 HP motor supports compact high-pressure commercial HVAC circulation applications.
- 3500 to 3550 RPM operation provides the specified high-speed pump configuration.
- Three-phase electrical design requires verified voltage and phase rotation.
- 2-inch suction and 1.5-inch discharge connections match the 1.5AC case.
- NEMA JM frame supports compatible close-coupled commercial motor installation.
- Footless construction helps organize space-conscious HVAC mechanical-room layouts.
- Close-coupled design connects motor and pump within one compact assembly.
- Flow, head, amperage, impeller, seal, temperature, dimensions, weight, protection, and warranty require confirmation.

Why Choose Bell & Gossett Series 1531 Model 1-1/2AC

This Bell & Gossett high-pressure HVAC pump combines high-speed operation, NEMA JM mounting, and footless close-coupled construction.

- Build: The NEMA JM frame, close-coupled layout, and footless design support compact commercial pump installation.
- Value: Space-saving construction can reduce support hardware and equipment-room congestion when piping loads remain independently supported.
- Audience: Commercial HVAC contractors, pressure-boosting installers, building engineers, hydronic designers, and facility maintenance teams can specify this model.

Applications & Use Cases

Use the Bell & Gossett Series 1531 Model 1-1/2AC for compact commercial HVAC, high-pressure boosting, chilled-water circulation, and close-coupled hydronic systems. Physical dimensions, unit weight, and port reach were not supplied, so verify the 2-inch suction and 1.5-inch discharge alignment, vertical clearance, motor access, valve spacing, and lifting requirements before installation.

Warranty & Support

- Warranty: Bell & Gossett general product terms provide one year from installation or 18 months from product date code, whichever occurs first.
- Check phase rotation, purge air, inspect the seal area, verify motor alignment, and confirm operating conditions during commissioning.

Flush debris from the suction line, protect the pump from cavitation, and inspect the footless assembly during scheduled HVAC maintenance. Purchase the Bell & Gossett Series 1531 Model 1-1/2AC high-pressure HVAC pump from Mulmotor.com for authentic equipment, applicable factory warranty protection, and pump support.