Bell & Gossett 168021 Series 1535 – 351S – 1/3HP Pump

Description

Cooling tower technicians choose Bell & Gossett Series 1535 351S for compact circulation through small heat exchangers, cooling equipment, and industrial process loops. The 1/3 HP single-phase motor fits smaller hydronic duties where close-coupled construction can simplify piping access and replacement work. Fill and vent the loop before energizing because a dry-running circulator can damage the seal and interrupt heat transfer.

The Series 1535 351S uses an ODP motor, sealed ball bearings, and a stainless steel shaft sleeve in a close-coupled vertical or horizontal configuration. The ODP enclosure requires a dry, ventilated location protected from direct dripping and washdown. Verified data does not list voltage, RPM, amp draw, impeller material, GPM, maximum head, connection size, seal compound, pressure control, or self-priming capability, so match the pump to the system curve before ordering.

Key Features of Bell & Gossett Series 1535 351S

• 1/3 HP hydronic circulator for cooling towers and small heat exchangers.
• Single-phase motor configuration supports compatible commercial branch circuits.
• ODP motor design requires a protected, dry installation location.
• Close-coupled layout supports vertical or horizontal in-line mounting.
• Stainless steel shaft sleeve helps resist shaft wear and corrosion.
• Sealed ball bearings provide maintenance-free bearing operation.
• Industrial process pump design suits compact heat-transfer equipment.
• Voltage, flow, maximum head, port size, seal type, thermal protection, and warranty terms were not included in the verified specifications.

Why the Bell & Gossett Series 1535 351S Stands Out

This Bell & Gossett hydronic circulator pairs a close-coupled configuration with sealed bearings and a stainless steel shaft sleeve for compact mechanical-room service.

• Build: The shaft sleeve and sealed bearing assembly reduce routine lubrication requirements, while the ODP motor should remain protected from condensation and direct water.
• Value: Maintenance-free bearings can reduce scheduled service work, while correct flow matching helps limit noise, overheating, and premature seal wear.
• Audience: HVAC contractors, cooling-tower technicians, facility engineers, heat-exchanger installers, and industrial maintenance teams can use this pump for compatible circulation systems.

Applications & Use Cases

Install the Bell & Gossett Series 1535 351S in cooling-tower circuits, small heat-exchanger loops, industrial process-water lines, and compact hydronic systems. Physical dimensions, unit weight, and suction or discharge port reach were not supplied, so measure the piping bay and reserve clearance for isolation valves, venting, motor cooling, and service access.

Warranty & Support

• Factory warranty terms were not included in the supplied product data. Confirm coverage period, installation conditions, registration steps, and service availability before ordering.
• Verify voltage, rotation, system fill, air removal, flow direction, and seal condition during commissioning.

Inspect the shaft-seal area for leakage, protect the ODP motor from moisture, clean inlet strainers, and confirm adequate fluid level during operation. Purchase the Bell & Gossett Series 1535 351S hydronic circulator pump from [store domain] for authentic equipment, applicable factory warranty protection, and pump support.