Pedrollo NK Series Submersible Multicell Pumps
For Clean Water Applications
Product Overview
The Pedrollo NK series submersible multicell pumps are recommended for pumping clean water in domestic, agricultural, and civil sectors. They are ideal for water supply from tanks or feed tanks, and for irrigating gardens and vegetable patches.
Key Features:
- Flow rate up to 200 l/min (12 m³/h)
- Head up to 92 m
- Suitable for clean water
- Available in single-phase and three-phase versions
Applications:
- Domestic water supply
- Civil use
- Agricultural use
- Water distribution in combination with autoclaves
- Irrigation of vegetable gardens and orchards
- Pressure boosting
Special Executions on Request:
- Pumps supplied with different cable lengths.
- Pumps with different voltage or frequency.
Patents: Pedrollo holds patent IT0001428923.
Execution:
- Float switch for single-phase versions.
- Standard power cable length of 10 meters.
Usage Limits:
- Liquid temperature up to +40 °C.
- Maximum sand content: 150 g/m³.
- Immersion depth up to 20 meters below the water level (with adequately long power cable).
Diagram: A diagram illustrates a vertical installation of the pump in a water tank, showing the float switch and water outlet.
Performance Curves and Data (60 Hz)
The following chart displays the performance curves for various NK models, showing the relationship between Head (H) in meters and Flow Rate (Q) in l/min and m³/h.
Diagram: A graph with Head (meters) on the Y-axis and Flow Rate (l/min and m³/h) on the X-axis. Several curves are plotted for different NK models (NK2/4, NK2/3, NK4/4, NK4/3, NK2/2, NK4/2).
| Type | Power (P2) | m³/h | Flow Rate (l/min) | Head (m) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0.6 | 1.2 | 2.4 | 3.6 | 4.8 | 6.0 | 7.2 | 9.0 | 150 | |||||
| Monofásico | Trifásico | kW | HP | 0 | 10 | 20 | 40 | 60 | 80 | 100 | 120 | 150 | ||
| NKm 2/2 GE | NK 2/2 | 0.75 | 1 | 46 | 45.5 | 44.5 | 41.5 | 37 | 31 | 23.5 | ||||
| NKm 2/3 GE | NK 2/3 | 1.1 | 1.5 | 69 | 68 | 66.5 | 62.5 | 55.5 | 47 | 35 | ||||
| NKm 2/4 GE | NK 2/4 | 1.5 | 2 | 92 | 91 | 89 | 83 | 74 | 62.5 | 47 | ||||
| NKm 4/2 GE | NK 4/2 | 0.75 | 1 | 40 | 38 | 36.5 | 35 | 32 | 27 | 21 | 10 | |||
| NKm 4/3 GE | NK 4/3 | 1.1 | 1.5 | 60 | 58 | 55.5 | 52 | 47.5 | 41.5 | 34 | 19 | |||
| NKm 4/4 GE | NK 4/4 | 1.5 | 2 | 78 | 76 | 73 | 68.5 | 62.5 | 54 | 43.5 | 23 | |||
Note: Performance curves tolerance according to EN ISO 9906 Grade 3B. Single-phase pumps without float switch available on request.
Specifications
Consumptions
| Type | Voltage | Current (A) | Type | Voltage | Current (A) |
|---|---|---|---|---|---|
| Monofásico | Trifásico | ||||
| NKm 2/2 GE | 220 V | 5.8 A | NK 2/2 | 380 V | 2.2 A |
| NKm 2/3 GE | 220 V | 8.2 A | NK 2/3 | 380 V | 3.1 A |
| NKm 2/4 GE | 220 V | 10.0 A | NK 2/4 | 380 V | 3.5 A |
| NKm 4/2 GE | 220 V | 5.8 A | NK 4/2 | 380 V | 2.3 A |
| NKm 4/3 GE | 220 V | 7.7 A | NK 4/3 | 380 V | 3.1 A |
| NKm 4/4 GE | 220 V | 10.2 A | NK 4/4 | 380 V | 3.5 A |
Dimensions and Weights
| Type | Connection DN | Stages | Dimensions (mm) | Weight (kg) | ||
|---|---|---|---|---|---|---|
| Ø | h | 1~ (Single-phase) | 3~ (Three-phase) | |||
| Monofásico | Trifásico | |||||
| NKm 2/2 GE | NK 2/2 | 2 | 135 | 459 | 15.2 | 15.0 |
| NKm 2/3 GE | NK 2/3 | 3 | 135 | 516 | 16.6 | 15.4 |
| NKm 2/4 GE | NK 2/4 | 4 | 135 | 563 | 18.6 | 19.2 |
| NKm 4/2 GE | NK 4/2 | 2 | 135 | 459 | 15.2 | 15.0 |
| NKm 4/3 GE | NK 4/3 | 3 | 135 | 516 | 16.6 | 15.4 |
| NKm 4/4 GE | NK 4/4 | 4 | 135 | 563 | 18.6 | 19.2 |
Palletization
| Type | Groupage (No. of pumps) | Container (No. of pumps) | |
|---|---|---|---|
| Monofásico | Trifásico | ||
| NKm 2/2 GE | NK 2/2 | 30 | 54 |
| NKm 2/3 GE | NK 2/3 | 30 | 54 |
| NKm 2/4 GE | NK 2/4 | 25 | 45 |
| NKm 4/2 GE | NK 4/2 | 30 | 54 |
| NKm 4/3 GE | NK 4/3 | 30 | 54 |
| NKm 4/4 GE | NK 4/4 | 25 | 45 |
Construction Characteristics
- 1 Outer casing: AISI 304 Stainless Steel, with ISO 228/1 threaded discharge connection.
- 2 Suction strainer: AISI 304 Stainless Steel with anti-vibration feet.
- 3 Motor casing: AISI 304 Stainless Steel.
- 4 Impellers and diffusers: Noryl™.
- 5 Diaphragms: AISI 304 Stainless Steel.
- 6 Motor shaft: AISI 431 Stainless Steel.
- 7 Double mechanical seal with interposed oil chamber:
- Seal STA-17 (Ø 17 mm) - Motor side: Ceramic / Graphite / NBR
- Seal ST1-16 (Ø 16 mm) - Pump side: Silicon Carbide / Graphite / NBR
- 8 Capacitor.
- 9 Electric motor:
- NKm (single-phase 220 V - 60 Hz) with thermal protection integrated in the winding.
- NK (three-phase 380 V - 60 Hz).
- Continuous duty: S1.
- Insulation class: F.
- Protection: IP X8.
- 10 Power cable:
- Type DRINCABLE®, approved for potable water use by the "WRAS" body according to BS 6920, approval no. 7513.
- Standard length: 10 meters.
- 11 Automatic air vent valve.
- 12 Anti-vibration feet.
- 13 Float switch (only for single-phase versions).
Diagram: An illustration shows a cutaway view of the submersible pump, highlighting its internal components such as the motor, impellers, diffusers, mechanical seal, and float switch.
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