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Cast iron circulating pump coupler, model 118473

BELL AND GOSSETT

BELL AND GOSSETT 118473 Circulating Pump Coupler

SKU CH-PTGB-W22WG

Connects compatible Bell & Gossett in-line circulating pumps with a cast-iron coupler for series 60 and E-60 models

  • Cast-iron construction resists corrosion for long service life
  • Fits Bell & Gossett Series E-60 and 60 circulating pumps
  • Compatible with models 604S, 608S, 611T, 613S, B604S, B611S
  • Matches Grainger part numbers 4RD13, 4RD14, 5YN64 through 5YN72
  • Replaces manufacturer model numbers 105089 and 105097

BELL & GOSSETT 118473 Circulating Pump Coupler

This cast iron coupler connects compatible Bell & Gossett in-line circulating pumps to their motor shafts. It fits models including the 604S, 608S, 611T, 613S, B604S, and B611S within the Series E-60 and 60 families. Maintenance technicians and facility engineers use it to restore pump operation after coupling wear or failure.

Cast iron construction and spline-free mounting

The coupling uses a cast iron body that resists corrosion in hydronic heating and cooling loops. Because the number of splines is not applicable, the part mounts via a keyed or friction-fit interface rather than a splined connection. This design simplifies alignment during installation and reduces the risk of stripped drive surfaces over time.

Thermal stability and power transmission

Cast iron maintains dimensional stability across the temperature ranges found in typical circulating pump applications. The rigid coupling transmits motor torque directly without damping elements, so mechanical noise stays low when the pump and motor are properly aligned. Power draw reflects only the pump hydraulic load, with no additional losses from the coupling itself.

Highlights

  • Cast-iron construction resists corrosion for long service life
  • Fits Bell & Gossett Series E-60 and 60 circulating pumps
  • Compatible with models 604S, 608S, 611T, 613S, B604S, B611S
  • Matches Grainger part numbers 4RD13, 4RD14, 5YN64 through 5YN72
  • Replaces manufacturer model numbers 105089 and 105097

Specifications

BrandBELL & GOSSETT

Questions about this item

What pump series does the 118473 coupler fit?

It fits Bell & Gossett Series E-60 and Series 60 in-line circulating pumps.

What material is the coupling made from?

The coupling is cast iron, matching the original equipment specification.

How do you align the coupler during installation?

Slide it onto the motor and pump shafts, then tighten the set screws evenly so the faces seat flush without binding.

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