Description
Bell & Gossett 103350 NRF-33 Cast Iron Wet Rotor Circulator Overview
The Bell & Gossett 103350 (Model NRF-33) is a high-quality, single-speed, wet rotor circulator pump engineered for reliable performance in residential and light commercial hydronic heating systems. Built with a durable cast iron body, this circulator delivers efficient fluid movement while operating quietly and with minimal maintenance requirements — a hallmark of Bell & Gossett’s trusted NRF series.
Key Specifications
- Model: NRF-33
- Voltage: 115VAC
- Phase: Single Phase
- Speed: Single Speed
- Motor Speed: 2,950 RPM
- Full Load Amps: 1.10 A
- Power Consumption: 125 Watts
- Body Material: Cast Iron
- Design: Wet Rotor (inline motor and pump)
- Compatible Flange Sizes: 3/4″, 1″, 1-1/4″, and 1-1/2″
Features & Benefits
- Wet Rotor Design: The rotor operates within the circulated fluid, eliminating the need for external shaft seals and reducing maintenance requirements over the life of the unit.
- Cast Iron Construction: Provides long-lasting durability and resistance to the demands of hydronic heating applications.
- Versatile Flange Compatibility: Accepts 3/4″, 1″, 1-1/4″, and 1-1/2″ flanges, making it adaptable to a wide range of existing piping configurations.
- Single-Speed Operation: Straightforward, dependable performance for standard hydronic heating loops.
- Compact & Quiet: The inline wet rotor design minimizes vibration and noise for comfortable operation in occupied spaces.
- Trusted Bell & Gossett Quality: Backed by decades of hydronic expertise and engineered to meet the demands of professional HVAC installations.
Typical Applications
- Residential and light commercial hydronic heating systems
- Hot water boiler circulation loops
- Radiant floor heating systems
- Baseboard and fan coil unit systems
- Replacement circulator for existing NRF-33 installations
Installation Notes
The Bell & Gossett 103350 NRF-33 is designed for straightforward installation and is compatible with multiple flange sizes (3/4″ through 1-1/2″), providing flexibility for retrofit and new construction applications. Always consult the manufacturer’s installation guide and applicable local codes before installation.
