Overview
The Grundfos CR 4 is a vertical multistage centrifugal pump engineered for reliable performance in industrial and commercial systems. This used unit delivers 0.75 GPM at 230 PSI, making it suitable for pressure boosting, circulation, and liquid transfer applications. The CR 4 pump combines robust construction with proven efficiency, backed by Grundfos’s long track record in vertical pump design and manufacturing.
Key Features
- Vertical In-Line Design: Suction and discharge ports on the same level for compact piping and installation flexibility
- Durable Construction: Cast iron pump head and base; all wetted parts in AISI 304 stainless steel for corrosion resistance
- Maintenance-Free Seal: Cartridge-type mechanical shaft seal requires no routine maintenance
- Factory-Tested: Each unit tested for performance, power consumption, and static pressure before shipment
- Broad Application Range: Suitable for water systems, pressure boosting, circulation, and industrial transfer applications
Technical Specifications
- Flow Rate: 0.75 GPM
- Pressure Rating: 230 PSI
- Pump Type: Vertical multistage centrifugal
- Construction: Cast iron pump head and base; stainless steel wetted parts (EN 1.4301)
- Shaft Seal: Cartridge-type mechanical seal
- Port Configuration: Suction and discharge on same horizontal level (in-line)
Typical Applications
- Pressure boosting in water supply systems
- Closed-loop circulation for heating and cooling systems
- Industrial liquid transfer and distribution
- Boiler feedwater applications
- Water treatment and filtration systems
Compatibility & Replacements
Compatible With
- Industrial water systems and process loops
- Pressure boosting and circulation networks
- Standard 1.5-inch NPT and flanged piping connections
- Three-phase AC motors (standard industrial voltages)
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator or facility maintenance team before ordering. Grundfos CR pump series includes multiple stage configurations; confirm exact model designation (e.g., 4-20-C) matches your legacy installation.
Works With
- Standard industrial control systems and soft starters
- Variable frequency drives (VFDs) for speed control
- Grundfos system monitoring and service diagnostics
- Pressure gauges, flow meters, and temperature sensors
