Datasheet summary
N, N4
PDF datasheet mirror for N, N4 (Calpeda Pumps). Verify with OEM before design.
Summary
Product Identification
The N and N4 series are single-stage end-suction centrifugal pumps with a bearing bracket, designed for easy dismantling and reassembly (Back Pull-Out construction). Nominal duty points and main dimensions comply with EN 733. The electropumps N, B-N, N4, B-N4 series comply with European Regulation no. 547/2012.
- Versions:
- N, N4: Pump casing and lantern bracket in cast iron.
- B-N, B-N4: Pump casing and lantern bracket in bronze.
- Pumps are supplied fully painted.
- Rated Speed of Rotation (50 Hz):
- N ≈ 2900 rpm.
- N4 ≈ 1450 rpm.
- Connections: PN 10 flanges EN 1092-2.
- Counter-flanges (on request):
- Sizes from 32-160 to 50-250: Screwed flanges PN 16 EN 1092-1.
- Sizes from 65-125 to 150-400: Flanges for welding PN 10 EN 1092-1.
- Shaft Sealing:
- Standardized mechanical seal in accordance with ISO 3069.
- Stuffing box seal (on request).
Applications
These pumps are suitable for clean liquids, without abrasives, which are non-aggressive for the pump materials (contents of solids up to 0.2%).
Typical applications include:
- Water supply.
- Heating, air conditioning, cooling, and circulation plants.
- Civil and industrial applications, and for agriculture.
- Fire fighting applications.
- Irrigation.
Operating Limits
- Liquid Temperature: From -10 °C to +90 °C.
- Ambient Temperature: Up to 40 °C.
- Total Suction Lift: Up to 7 m.
- Maximum Permissible Working Pressure:
- Up to 10 bar.
- 16 bar for N,N4 40-160,200; N,N4 50-125,160; N,N4 65-125,160,200,250; N,N4 80-160,315,400.
- Maximum Permissible Rotation Speed: See table on page 82 of the official PDF.
Electrical
The pump-motor unit connects the N,N4 pump to a standard electric motor in B3 construction form (EN 60072-1) via a baseplate, flexible coupling, and coupling protection.
- Standard Configuration: Three-phase 400 V, 50 Hz.
- Motor Efficiency: Classification scheme IE3 for three-phase motors from 0,75 kW.
- Protection: IP 55.
- Compatibility: Motor suitable for operation with frequency converter.
Mechanical / Hydraulic
Materials of Construction:
| Component | N, N4 (Standard Construction) | B-N, B-N4 (Bronze Construction) |
|---|---|---|
| Pump casing | Cast iron GJL 200 EN 1561 | Bronze G-Cu Sn 10 EN 1982 |
| Casing cover | Cast iron GJL 200 EN 1561 | Bronze G-Cu Sn 10 EN 1982 |
| Impeller | Cast iron GJL 200 EN 1561 | Bronze G-Cu Sn 10 EN 1982 |
| (Also Brass P-Cu Zn 40 Pb 2 UNI 5705 for 32-125, 32-160, 32-200, 40-200) | ||
| Shaft | Chrome steel 1.4104 EN 10088 (AISI 430) | Carbon steel C 40 UNI 7845 (Also Cr-Ni-Mo steel 1.4401 EN 10088 (AISI 316)) |
| Shaft sleeve | Bronze G-Cu Sn5 Zn5 Pb5 EN 1982 with chromate surface | – |
| Mechanical seal | Carbon - Ceramic - NBR | Carbon - Ceramic - NBR |
| Counter-flanges | Steel Fe 430B UNI 7070 | Steel Fe 430B UNI 7070 |
Special Features (on request)
- Special mechanical seal.
- Chrome-nickel steel AISI 316 pump-shaft.
- Higher or lower liquid or ambient temperatures.
- Other motor protection.
- Motor for other voltage.
- Frequency 60 Hz (as per 60 Hz data sheet).
Performance Data
The extracted text includes extensive performance tables and characteristic curves for various pump models (N and N4 series) at approximate speeds of 2900 rpm and 1450 rpm. These tables detail pump power input (P3 kW), rated motor power output (P2 kW), flow rates (Q m³/h, Q l/min), and total head (H m). The characteristic curves illustrate head, power, NPSH, and efficiency against flow rate.
See the official PDF for exact tabulated values and detailed characteristic curves.
Disclaimer: This summary is based solely on the provided text extract. It may not include all figures, footnotes, or the latest revisions present in the complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.
Official datasheet (PDF)
Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.