Description
The Bell & Gossett 103351LF is a high-performance, lead-free bronze wet rotor circulator designed for hydronic heating and cooling systems where reliability, efficiency, and regulatory compliance are paramount. Operating on 115VAC single-phase power, this Model NBF-33 circulator delivers consistent, single-speed performance with a compact, maintenance-friendly wet rotor design that eliminates the need for external shaft seals and bearings lubrication.
Key Specifications
- Model: NBF-33
- SKU: 103351LF
- Voltage: 115VAC, Single Phase
- Speed: Single Speed — 2,950 RPM
- Full Load Amps: 1.10 A
- Power Consumption: 125 Watts
- Construction: Lead-Free Bronze Wet Rotor
- Compatible Flange Sizes: 3/4″, 1″, 1-1/4″, and 1-1/2″
Lead-Free Bronze Construction
The 103351LF is built with lead-free bronze wetted components, ensuring full compliance with NSF/ANSI 61 and applicable lead-free plumbing regulations. This makes it an ideal choice for potable water and closed-loop hydronic systems where material compliance is required by code.
Wet Rotor Design Advantages
The wet rotor configuration allows system fluid to lubricate and cool the motor’s rotor and bearings, eliminating the need for mechanical shaft seals and external lubrication. The result is a quieter, longer-lasting circulator with significantly reduced maintenance requirements — a proven design trusted in residential and light commercial hydronic systems.
Versatile Flange Compatibility
Designed for maximum installation flexibility, the NBF-33 is compatible with 3/4″, 1″, 1-1/4″, and 1-1/2″ flanges, making it a versatile drop-in replacement or new-installation solution across a wide range of hydronic piping configurations.
Ideal Applications
- Residential and light commercial hydronic heating systems
- Closed-loop hot water circulation
- Radiant floor heating distribution
- Baseboard and fan coil hydronic loops
- Lead-free compliant potable water systems
Why Choose Bell & Gossett
Bell & Gossett, an Xylem brand, is the industry standard in hydronic pumping and circulation. The NBF-33 series continues that legacy with a product engineered for long service life, quiet operation, and easy installation — backed by decades of hydronic expertise.
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