The Grundfos CRN 255-4-2 (product number 92542754, type key A-P-A-V-HQQV) is a 4-stage vertical multistage centrifugal pump rated 1350 US gpm at 650 ft, driven by a 300 HP motor. Certified to NSF/ANSI 372 for drinking-water service.
Performance Curve
Official Grundfos curve — 60 Hz, water at 68 °F. Head (H) and efficiency (η) against flow (Q); lower chart shows power and NPSH required.
Performance & Hydraulic Data
| Rated flow | 1350 US gpm |
| Rated head | 650 ft |
| Maximum head | 859.3 ft |
| Stages / impellers | 4 / 4 |
| Rated pump speed | 3578 rpm |
| Maximum operating pressure | 580.15 psi |
| Pump orientation | Vertical |
| Curve tolerance | ISO9906:2012 3B |
Materials of Construction
| Pump base | Stainless steel — EN 1.4408 — ASTM A351 CF8M |
| Impellers & chambers | Stainless steel — EN 1.4401 — AISI 316 |
| Shaft seal | HQQV — FKM (Viton) elastomers |
| Bearing | WC/WC |
Motor & Electrical Data
| Rated power (P2) | 300 HP |
| Voltage | 460 V |
| Phase | Three-phase |
| Frequency | 60 Hz |
| Rated speed | 3570 rpm |
| Rated current | 320 A |
| Service factor | 1.15 |
| Power factor (cos φ) | 0.90 |
| Motor efficiency | 95.8% full load | 95.8% at 3/4 load | 95.4% at 1/2 load |
| Enclosure class | IP55 / TEFC |
| Insulation class | F |
| Motor protection | NONE |
| Motor flange | 449TSD |
| Grundfos motor number | 99883221 |
Connections & Operating Limits
| Connection type | PJE |
| Pressure rating | 800 psi |
| Suction port | 8 inch |
| Discharge port | 8 inch |
| Liquid temperature range | -4 °F to 194 °F |
Approvals, Weights & Identification
| Drinking water | NSF/ANSI 372 |
| Grundfos product number | 92542754 |
| EAN | 5715115987478 |
| Net weight | 3613.7 lb |
| Gross (shipping) weight | 5334.8 lb |
| Country of origin | United States |
| HS / customs tariff code | 8413.70.2040 |
Typical Applications
Water supply and pressure boosting • reverse osmosis and filtration feed • water treatment • boiler feed • industrial process • HVAC • irrigation.
Need help? Contact ForeverPure Place for pricing, lead time, accessories, or help selecting the correct model for your application.
Accessories for This Pump
Commonly specified alongside fixed-speed Grundfos pumps. Send us your pump nameplate and we will confirm the correct part for your exact build and voltage before you order.
LiqTec Dry-Run Protection Sensor
Shuts the pump down before a dry run destroys the shaft seal — the single most common CR failure mode.
CUE Variable Frequency Drive
External VFD that converts this fixed-speed pump to constant-pressure or variable-flow control.- RPS Pressure Sensor
Discharge pressure feedback for constant-pressure booster control.
