Bell & Gossett Series NRF Wet Rotor Pumps

Quiet Wet Rotor Circulation for Closed Hydronic Heating Systems

Bell & Gossett NRF wet rotor pumps are flanged in-line, system-lubricated circulators designed for quiet, dependable operation in closed hydronic heating systems. Built for reliable seasonal start-ups and long service life, the NRF Series is a strong choice for residential and light commercial heating applications.

The NRF Series features high starting torque, providing up to 80% more starting torque than competing circulators. This helps support dependable start-ups, especially after seasonal shutdowns or extended periods of inactivity.

Bell & Gossett’s DuraGlide™ Bearing System combines multiple components that work together to help prevent seasonal freeze-up and provide years of trouble-free operation. The pump’s closed impeller design improves operating efficiency, while the stabilized, heat-resistant polypropylene impeller supports durable performance in heating system environments.

For added protection, the NRF Series includes a self-cleaning particle shield that helps protect the shaft and bearings from start-up debris. A one-piece, high-nickel stainless steel stator can isolates the stator from system fluid while helping maintain precise bearing alignment for longer bearing life.

Carbon bearings, a diamond-like ceramic shaft, and generous internal clearances help resist lime, chloride, and oxide buildup. Corrosion-resistant stainless steel construction on the face plate and rotor sleeve further supports longer pump life.

Product Features

• Flanged in-line wet rotor circulator design
  
• Designed for quiet operation in closed hydronic heating systems
  
• System-lubricated for dependable performance
  
• High starting torque for reliable seasonal start-ups
  
• Provides up to 80% more starting torque than competing circulators
  
• DuraGlide™ Bearing System helps prevent seasonal freeze-up
  
• Closed impeller design improves operating efficiency
  
• Stabilized, heat-resistant polypropylene impeller
  
• Self-cleaning particle shield protects shaft and bearings from start-up debris
  
• One-piece high-nickel stainless steel stator can isolates stator from system fluid
  
• Maintains precise bearing alignment for longer bearing life
  
• Carbon bearings and diamond-like ceramic shaft resist buildup
  
• Generous clearances help reduce lime, chloride, and oxide buildup
  
• Stainless steel face plate and rotor sleeve provide corrosion resistance
  
• Backed by Bell & Gossett representatives
  

Common Applications

• Closed hydronic heating systems
  
• Residential heating systems
  
• Light commercial heating systems
  
• In-line circulation applications
  
• Seasonal heating system operation