Bell & Gossett Series PR Circulator Pumps

Three-Piece Booster Pump Reliability for Hydronic Systems

Bell & Gossett PR Series iron and bronze booster pumps are in-line, three-piece pumps designed for dependable circulation in hydronic systems. Built for reliable performance and field serviceability, these pumps are a practical choice for heating, cooling, and general hydronic applications.

PR Series pumps are available in cast iron or bronze body construction. Cast iron models are commonly used for closed-loop hydronic systems, while bronze construction should be used where potable water is supplied. Series 100 and HV models are listed with Underwriters Laboratories, and Bell & Gossett boosters with standard 60 Hz single- and three-phase motors are CSA certified.

Each pump features mechanical carbon-on-ceramic seal construction for dependable operation. Depending on the model, pump and motor bearing designs may include oil-lubricated bronze sleeve bearings or permanently lubricated ball bearings. Flexible coupler designs support smooth power transfer between the motor and pump.

Bell & Gossett motors are available from 1/12 HP through 1-1/2 HP in standard single- and three-phase drip-proof configurations, with recognition under the Underwriters Laboratories Component Program.

Product Features

• In-line three-piece booster pump design
  
• Designed for hydronic system applications
  
• Available in cast iron or bronze body construction
  
• Bronze pumps should be used where potable water is supplied
  
• Mechanical carbon-on-ceramic seal
  
• Series 100 and HV models are UL-listed
  
• Standard Bell & Gossett 60 Hz single- and three-phase motor packages are CSA certified
  
• Bell & Gossett drip-proof motors available from 1/12 HP through 1-1/2 HP
  
• Motors are recognized under the UL Component Program
  
• Carbon steel, heat-treated shaft
  
• Flexible coupler design for reliable operation
  
• Oil-lubricated bronze sleeve bearings on most models
  
• Permanently lubricated ball bearings on PD-38 and PD-40 models

Operational Data

• Maximum working pressure: 125 PSI / 682 kPa
  
• Maximum operating temperature with standard seal: 225°F / 107°C continuous
  
• Maximum operating temperature with special seals: 250°F / 121°C continuous
  
• Maximum motor speed: 1750 RPM

Construction Details

• Body: cast iron or bronze
  
• Seal: mechanical, carbon on ceramic
  
• Shaft: heat-treated carbon steel
  
• Bearings: All models except PD-38 and PD-40: bronze sleeve, oil-lubricated
  PD-38 and PD-40: ball bearing, permanently lubricated
  
• Coupler: All models except PD-38 and PD-40: flexible spring type
  PD-38 and PD-40: flexible sleeve type

Common Applications

• Hydronic heating systems
  
• Hydronic cooling systems
  
• Closed-loop circulation
  
• Potable water applications with bronze models
  
• General booster pump applications