Grundfos CR 1-21 Vertical Multistage Centrifugal Pump
Grundfos CR 1-21 Vertical Multistage Centrifugal Pump
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| Performance Parameter | Engineering Baseline Value |
|---|---|
| Manufacturer Part Number (MPN) | 96516246 (Standard Baseline Configuration) |
| 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) |
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Formal Purchase Orders (POs) and tax-exempt ordering are accepted for commercial contractors and institutional facilities.
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Engineered for ultra-high-pressure clean water supply, sophisticated filtration systems, reverse osmosis treatment loops, and advanced boiler feed configurations, the Grundfos CR 1-21 is an industrial-grade vertical multistage centrifugal inline pump. Featuring an expansive 21-stage internal stack designed to maximize head pressure while keeping the nominal volume flow highly controlled, this vertical powerhouse slots directly into existing inline piping networks with suction and discharge connections arranged on a uniform line.
The CR 1-21 is built to run continuously under high-stress conditions and features Grundfos's legendary cartridge shaft seal structure. This pre-assembled component design contains mechanical wear factors and isolates runtime friction, allowing field service technicians to swap seals quickly in minutes without disconnecting the primary drive motor.
Key System Performance Baselines:
- Extreme Multi-Stage Stack: 21 precision-balanced, laser-welded stainless steel impellers deliver immense vertical pressure lifting metrics within a highly space-efficient footprint.
- Industrial-Grade Materials: Cast iron pump head stool and baseplate block anchor a highly wear-resistant internal fluid core built entirely of premium 304 stainless steel.
- Superior Seal Longevity: Equipped with a balanced mechanical cartridge shaft seal paired with EPDM elastomers for elite structural temperature tolerances and leakage control.
- Inline Connection Matching: Standard oval or round companion flange connection layouts enable simple, straight-through horizontal line piping.
⚠️ Application Profile: This CR 1 high-head configuration is specialized for demanding industrial water filtration, reverse osmosis ($RO$), pressure wash boosting systems, micro-boiler networks, and complex commercial cooling circuits.
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