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

Description

Bell & Gossett Series 1531 1-1/4BC delivers high-head, medium-flow process-water circulation with a 7.5 HP, 3500/3550 RPM motor. The larger 2-inch suction and 1-1/4-inch discharge arrangement suits commercial and industrial systems where the pump must overcome higher resistance without using a small in-line circulator. Confirm the motor enclosure, impeller trim, suction conditions, and base alignment before installation.

The close-coupled centrifugal design uses a precision-trimmed impeller in the 1.25BC case size. Final impeller diameter must match the specified operating point, and the supplied range of approximately 5.5 to 6.0 inches should not replace an approved curve selection. Flow, exact head, voltage, phase, amp draw, dimensions, weight, and seal material were not provided, so verify the complete submittal before purchase.

Key Features & Benefits

• 7.5 HP Motor: Supports high-head, medium-flow process-water and commercial circulation duties.
• 3500/3550 RPM Speed: Identifies the two-pole high-speed motor configuration for replacement checks.
• 1.25BC Case Size: Provides the specified pump configuration for accurate equipment comparison.
• 2-Inch Suction: Accommodates the larger inlet connection listed for this case size.
• 1-1/4-Inch Discharge: Defines the outlet connection for compatible process-water piping.
• Precision-Trimmed Impeller: Matches hydraulic output to the selected operating point when correctly specified.
• Close-Coupled Design: Keeps the motor and pump in one assembly for compatible equipment layouts.

Why Choose Bell & Gossett Series 1531 1.25BC

The 1.25BC configuration is suited to higher-head process-water applications where motor power, impeller trim, and suction conditions must be selected from a verified engineering curve.

• Build: Close-coupled construction, 1.25BC case size, larger suction, and precision-trimmed impeller define the pump arrangement.
• Value: Correct impeller trimming can help match output to the system and prevent over-pumping or excessive throttling.
• Audience: Designed for industrial maintenance buyers, process-water contractors, commercial HVAC teams, and facility engineers.

Applications & Use Cases

Use Bell & Gossett Series 1531 1.25BC for high-head, medium-flow process water, commercial circulation, and compatible industrial HVAC systems. The supplied data does not include overall dimensions, unit weight, base measurements, or final port-to-port reach, so verify suction piping, discharge alignment, foundation space, lifting access, coupling clearance, and impeller trim before installation.

Warranty & Support

• Warranty Terms Require Confirmation: Verify duration, coverage, registration, exclusions, and authorized service requirements with the seller.
• Confirm the 1.25BC case, 7.5 HP motor, 3500/3550 RPM speed, connection sizes, and final impeller trim before purchase.

Inspect suction conditions, install the pump on a suitable base, align the coupling, verify motor rotation, and prime the casing before startup. Monitor pressure, vibration, seal leakage, bearing temperature, and operating flow during commissioning. Purchase the Bell & Gossett Series 1531 1.25BC 7.5 HP close-coupled centrifugal pump through Mulmotor.com for authentic equipment, applicable warranty support, and pump assistance.