Grundfos CR 1-21 - CR 1-21 Vertical Multi-Stage Centrifugal Pump
Grundfos CR 1-21 - CR 1-21 Vertical Multi-Stage Centrifugal Pump
⚠️ FREIGHT DELIVERY NOTICE: Due to the industrial weight of this commercial equipment, it must ship via LTL freight carrier. Free Liftgate Service is included with your order if a commercial loading dock or forklift is not available on-site.
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Grundfos CR 1-21 Vertical Multistage Centrifugal Pump
Engineered for ultra-high head pressure applications, high-pressure washing arrays, water purification/reverse osmosis feeds, and chemical dosing loops, the Grundfos CR 1-21 is a premium vertical inline multistage pump designed for continuous duty where space is at an absolute premium. Its space-saving vertical inline layout keeps suction and discharge ports aligned on a single level for smooth integration into existing piping lines.
The CR 1-21 features Grundfos’s signature cartridge shaft seal system. This pre-assembled mechanical assembly eliminates structural tracking stresses and allows maintenance technicians to complete rapid field replacements cleanly, without removing or disturbing the heavy motor block.
Key System Performance Baselines:
- High-Head Multistage Stack: Features a concentrated 21-stage internal impeller assembly engineered to achieve massive pressure profiles while maintaining a highly compact horizontal footprint.
- Industrial Metallurgy: A rugged cast iron pump base and motor head shield enclose laser-welded, precision-formed 304 stainless steel internal hydraulic components.
- Resilient Seal Engineering: Equipped with a balanced mechanical shaft seal backed by heavy-duty EPDM elastomers for elite thermal and chemical resilience.
- Uniform Piping Interface: Standardized inline oval or round flange paths facilitate a direct, straightforward installation and uniform flow transition.
⚠️ Application Profile: This CR 1 high-head assembly is highly recommended for commercial water boosting, chemical injection loops, industrial filtration arrays, boiler feed systems, and localized high-pressure thermal circuits.
| Performance Parameter | Engineering Baseline Value |
|---|---|
| Manufacturer Part Number (MPN) | 99915918 (3-Phase) / 99915848 (1-Phase) |
| Electrical Frequency / Standard | 60 HZ (North American Commercial Standard) |
| Number of Impellers/Stages | 21 Stages / 21 Impellers |
| Nominal Flow Rate Capability | 4.4 GPM (1 m³/h nominal baseline) |
| Maximum System Operating Pressure | 362 PSI (25 bar) |
| Allowable Media Temperature Range | -4°F to 248°F (-20°C to 120°C) |
| Base and Stool Structural Materials | Cast Iron (EN-GJL-200 / ASTM A48-25B) |
| Internal Hydraulic Metallurgy | 304 Stainless Steel (AISI 304 / EN 1.4301) |
Corporate Procurement & PO Processing
Formal Purchase Orders (POs) and tax-exempt ordering are accepted for commercial contractors and institutional facilities.
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- LTL Freight Dispatch: Heavy commercial units ship directly via insured LTL carrier with delivery coordination included.
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