GRUNDFOS · VERTICAL MULTISTAGE PUMP END
CRN 20 Pump End
Vertical multistage pump end in 316 stainless steel, motor not included. 9 models from CRN 20-1 to CRN 20-10 for 3 to 25 HP NEMA motors (182TC, 213TC, 254TC, 284TSC), 2 in ANSI flanged or 2 in Victaulic-type ports, HQQE or HQQV cartridge shaft seal.
66-698 ft (28-302 PSI) Max Head · 154.4-156 GPM Max
Fits 3-25 HP NEMA Motors, Frame 182TC to 284TSC
2 in ANSI or 2 in Victaulic Ports
In-Line Suction and Discharge
363 PSI Max Operating Pressure
NSF/ANSI 61
68.3-116.8 lb Weight
Overview
The CRN 20 pump end is the hydraulic part of a Grundfos CRN 20 vertical multistage pump, supplied without a motor: order it to rebuild an existing CRN 20, to change the number of stages for a new duty, or to build a pump on a motor you already have. Every part in contact with the liquid is stainless steel (EN 1.4401, AISI 316). Suction and discharge sit on the same level, so it drops into a straight pipe run. The CRN 20 is rated at 111 GPM (Grundfos nominal duty); size it from the performance table below rather than from the model number.
- 9 models, CRN 20-1 to CRN 20-10, each built for a NEMA C-face motor of 3 to 25 HP (motor table below)
- 2 in ANSI flanges, 300 lb, with a cast iron flange and base plate that do not touch the liquid (CRN 20-1 to CRN 20-10); or 2 in Victaulic-type grooved ends, with a cast iron base plate that does not touch the liquid (CRN 20-1 to CRN 20-10)
- HQQE (EPDM) or HQQV (FKM) cartridge shaft seal with silicon-carbide faces
- Maximum operating pressure: 363 PSI
What Ships and What It Needs to Run
Included: the CRN 20 pump end and the motor coupling (Grundfos price list).
Motor required, ordered separately. A NEMA C-face motor at the horsepower and frame shown for your model in the motor table under Models & Performance (3 to 25 HP), with the starter or drive that motor needs.
ANSI companion flanges or Victaulic couplings required, ordered separately. Grundfos supplies the companion connections for the ANSI and Victaulic versions as a separate 2 in set (Grundfos price list).
Suction and discharge piping, valves and controls: sized to your system and ordered separately.
Genuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
Warranty: 24 months from date of installation, but not more than 30 months from date of manufacture (Grundfos limited warranty). Grundfos repairs or replaces its own product; costs of removal, installation and transportation are not covered, and products sold but not manufactured by Grundfos carry their own manufacturer’s warranty.
Specifications
| Specification |
Value |
| Product |
Pump end only: hydraulic assembly and motor coupling, motor not included |
| Rated flow at 60 Hz |
111 GPM (Grundfos nominal duty) |
| Shut-off head range |
66 to 698 ft (28 to 302 PSI) |
| Motor required |
NEMA C-face, 3 to 25 HP; frames 182TC, 213TC, 254TC, 284TSC (by model, see motor table) |
| Suction and discharge ports |
In-line; 2 in |
| Connections |
2 in ANSI flanges, 300 lb, with a cast iron flange and base plate that do not touch the liquid; 2 in Victaulic-type grooved ends |
| Maximum operating pressure |
363 PSI |
| Liquid temperature |
Up to 248 °F with HQQE; up to 194 °F with HQQV |
| Shaft seal |
HQQE (EPDM) or HQQV (FKM) cartridge seal, SiC/SiC faces |
| Pump orientation |
Vertical |
| Frequency |
60 Hz |
| App |
None: a mechanical pump end with no electronics |
Models & Performance — Will It Do What You Need?
Find the pressure you need at your flow and pick the first model that reaches it. Pressure at flow in PSI, one row per model.
CRN 20-1 to CRN 20-10 · 9 models
| Model |
0 GPM (Shut-off) |
30 GPM |
75 GPM |
113 GPM |
150 GPM |
| CRN 20-1 |
28 |
29 |
26 |
20 |
11 |
| CRN 20-2 |
59 |
58 |
54 |
44 |
29 |
| CRN 20-3 |
89 |
88 |
83 |
69 |
47 |
| CRN 20-4 |
118 |
118 |
111 |
94 |
64 |
| CRN 20-5 |
149 |
148 |
140 |
118 |
81 |
| CRN 20-6 |
178 |
179 |
168 |
143 |
98 |
| CRN 20-7 |
211 |
209 |
198 |
169 |
117 |
| CRN 20-8 |
241 |
239 |
226 |
192 |
132 |
| CRN 20-10 |
302 |
301 |
285 |
243 |
170 |
Pressure the pump end develops at each flow, in PSI, rounded down (feet = PSI × 2.31), with the motor shown in the motor table. Shut-off is Grundfos’s published maximum head for each model. Flow columns are read from the Grundfos 60 Hz curve for each model (water at 68 °F), digitized and rounded down, at about 20%, 50% and 75% of 150 GPM, the last regular flow every curve in this listing reaches; the curves end at 154.4 to 156 GPM. Full curves are in the product images. On CRN 20-6 the curve reads above the published shut-off at low flow (by up to 1 ft); the published shut-off is kept and the flow columns follow the curve. The CRN 20-1 curve reads 70 ft at zero flow against 66 ft published; the published shut-off is shown and the flow columns follow the curve.
Motor each model needs (Grundfos price list; the motor is ordered separately):
| Model |
Motor HP |
NEMA frame |
| CRN 20-1 |
3 |
182TC |
| CRN 20-2 |
5 |
182TC |
| CRN 20-3 |
7 1/2 |
213TC |
| CRN 20-4 |
10 |
213TC |
| CRN 20-5 |
15 |
254TC |
| CRN 20-6 |
15 |
254TC |
| CRN 20-7 |
20 |
254TC |
| CRN 20-8 |
20 |
254TC |
| CRN 20-10 |
25 |
284TSC |
Before You Buy — The Limits That Decide the Fit
| Check |
What decides the fit |
| Motor |
Order a NEMA C-face motor at the HP and frame Grundfos lists for your model in the motor table under Models & Performance. |
| Duty point |
The model’s pressure at your flow must cover the system’s total head; shut-off is the most it can make, at zero flow. |
| Working pressure |
Inlet pressure plus the pressure the pump adds must stay within the maximum operating pressure: 363 PSI. |
| Liquid temperature |
Up to 248 °F with HQQE; up to 194 °F with HQQV. |
| Connections |
ANSI companion flanges or Victaulic couplings (2 in) ordered separately. Match the connection to the existing pipework. |
| Shaft seal |
HQQE has EPDM rubber parts and HQQV has FKM; choose the rubber that suits the pumped liquid. |
Applications
HVAC heating and air conditioning, district heating and cooling, plumbing pressure boosting, industrial water supply and transfer, process liquids, wash and clean, water treatment, irrigation and ground water transfer (Grundfos CR range applications).
Materials of Construction
| Component |
Material |
| All wetted parts |
Stainless steel EN 1.4401 (AISI 316) |
| Base plate; flange (ANSI versions) |
Cast iron, not in contact with the pumped liquid |
| Shaft seal faces |
Silicon carbide / silicon carbide (HQQ cartridge seal) |
| Seal and gasket rubber |
EPDM (HQQE) or FKM (HQQV) |
