Bell & Gossett Series 1531 Model 1-1/4AC Pump 7-1/2 HP 3500 RPM Motor

Description

Built in bronze-fitted construction, Bell & Gossett 1531 supports high-pressure booster service and commercial HVAC supply circulation with a 7.5 HP motor. Its 1-1/4 AC case, close-coupled layout, approximately 7-inch full-diameter impeller, and 3500 to 3550 RPM two-pole speed suit systems that need higher operating pressure from a compact pump assembly. Confirm suction conditions, motor data, pipe alignment, and rotation before startup.

The Bell & Gossett Series 1531 uses a 1.25AC case with a 1.5-inch suction connection and 1.25-inch discharge connection. Bronze-fitted construction and a full-diameter impeller support the high-pressure commercial HVAC profile, while the 7.5 HP motor operates at 3500 to 3550 RPM. Verified data does not include voltage, phase, amp draw, GPM, maximum head, seal type, operating temperature, dimensions, weight, pressure-switch settings, or self-priming capability, so select the pump from the verified hydraulic curve.

Key Features of Bell & Gossett Series 1531 Model 1.25AC

• 7.5 HP close-coupled pump for high-pressure commercial HVAC supply.
• 1.25AC case size with 1.5-inch suction and 1.25-inch discharge connections.
• 3500 to 3550 RPM two-pole high-speed motor configuration.
• Bronze-fitted construction supports commercial hydronic circulation.
• Full-diameter impeller measures approximately 7 inches based on the supplied specification.
• Close-coupled design supports compact vertical or in-line installation planning.
• High-pressure booster profile suits compatible commercial supply systems.
• Voltage, phase, amp draw, GPM, maximum head, seal, dimensions, weight, thermal protection, and warranty terms were not supplied.

Why the Bell & Gossett Series 1531 Model 1.25AC Stands Out

This Bell & Gossett high-pressure pump combines bronze-fitted construction with high-speed operation for commercial HVAC supply and booster applications.

• Build: Bronze-fitted construction, a full-diameter impeller, and close-coupled architecture support high-pressure circulation in compatible commercial systems.
• Value: The compact arrangement can simplify equipment-room planning, while correct suction sizing and curve matching help prevent cavitation and motor overload.
• Audience: Commercial HVAC contractors, pressure-boosting system installers, hydronic engineers, boiler technicians, and facility maintenance teams can apply this model where the hydraulic profile matches.

Applications & Use Cases

Use the Bell & Gossett Series 1531 Model 1.25AC for commercial HVAC supply, high-pressure booster service, chilled-water circulation, and hydronic distribution systems. Physical dimensions, unit weight, and port reach were not supplied, so verify the 1.5-inch suction and 1.25-inch discharge alignment, valve spacing, motor clearance, pipe support, and lifting access before installation.

Warranty & Support

• Factory warranty terms were not included in the supplied product data. Confirm warranty coverage, motor requirements, installation conditions, and authorized service availability before purchase.
• Inspect the bronze-fitted pump assembly, purge air, verify suction conditions, check the seal area, and confirm high-speed motor rotation during commissioning.

Flush debris from the suction line, protect the pump from cavitation, inspect flange joints, and verify the operating point during scheduled service. Purchase the Bell & Gossett Series 1531 Model 1.25AC high-pressure HVAC pump from [store domain] for authentic equipment, applicable factory warranty protection, and pump support.