Description
The Bell & Gossett 103316LF (Model NBF-18S) is a high-performance, lead-free bronze wet rotor circulator engineered for residential and light commercial hydronic heating systems. Featuring a compact, single-speed design and a robust wet rotor motor, this circulator delivers dependable, quiet, and efficient fluid circulation without the need for external lubrication — the circulating fluid itself lubricates the rotor bearings for maintenance-free operation.
Constructed with a lead-free bronze body to meet stringent potable water safety standards, the NBF-18S is an ideal choice for closed-loop hydronic systems, radiant floor heating, and domestic hot water recirculation applications.
Electrical Specifications
- Voltage: 115V AC
- Phase: Single Phase
- Full Load Amps: 0.74 A
- Power Consumption: 90 Watts
- Motor Speed: 3,000 RPM
Mechanical Specifications
- Connection Size: 1/2″ Sweat (Solder)
- Number of Speeds: Single Speed
- Rotor Type: Wet Rotor
- Body Material: Lead-Free Bronze
Key Features & Benefits
- Lead-free bronze construction for safe use in potable water and hydronic systems
- Wet rotor design eliminates the need for external lubrication — virtually maintenance-free
- Compact, single-speed operation for straightforward installation and reliable performance
- 1/2″ sweat connections for easy integration into standard copper piping systems
- Quiet operation suitable for residential environments
- Designed for long service life in closed-loop hydronic heating applications
Typical Applications
- Residential and light commercial hydronic heating systems
- Radiant floor heating loops
- Domestic hot water recirculation
- Boiler system circulation
