Description
The Grundfos 96633591 (Model UP 53-46 F) is a high-performance, single-speed wet rotor circulator pump engineered for reliable hydronic heating and cooling applications. Combining a rugged cast iron housing with a corrosion-resistant stainless steel impeller, this pump delivers dependable circulation in demanding commercial and residential systems.
The wet rotor design eliminates the need for external bearings and shaft seals, using the circulated fluid itself to lubricate and cool the motor — resulting in virtually maintenance-free operation and a quieter running profile compared to dry rotor alternatives.
Key Specifications
- SKU / Part Number: 96633591
- Model: UP 53-46 F
- Motor Power: 3/4 HP
- Voltage: 115/230V AC
- Phase: Single Phase
- Speed: 3450 RPM, 1 Speed
- Housing Material: Cast Iron
- Impeller Material: Stainless Steel
- Pump Design: Wet Rotor Circulator
Connection Details
- Suction and Discharge Connection Type: Non-ANSI 4-Bolt Flange
- Available Flange Sizes: 2″, 2-1/2″, and 3″
Construction & Design Highlights
- Cast iron pump body provides strength and long service life in hydronic systems
- Stainless steel impeller resists corrosion for extended reliability
- Wet rotor motor design — fluid-lubricated, no external seals or bearings required
- Single-speed operation simplifies installation and system control
- Dual-voltage capability (115/230V AC) offers installation flexibility
- Non-ANSI 4-bolt flange connections accommodate a range of pipe sizes (2″, 2-1/2″, 3″)
Typical Applications
- Hydronic heating and cooling systems
- Hot water recirculation
- Boiler circulation loops
- Commercial and light industrial HVAC systems
The Grundfos UP 53-46 F (96633591) is backed by Grundfos’ global reputation for pump engineering excellence, making it a trusted choice for HVAC contractors and mechanical engineers who demand performance and longevity in their hydronic systems.
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