VMHP (R/O high-pressure)
High-pressure pumps for seawater reverse-osmosis desalination, 500–12,500 t/day
Multistage high-pressure pumps for R/O seawater desalting systems, with impellers installed back to back to balance the large thrust force. Wet parts are precision-moulded duplex stainless steel with super austenitic stainless steel profile parts and anti-seawater mechanical seal rings; cartridge seals make assembly and maintenance easy. 20 and 42 m³/h sets use two pumps and PJE ferrule connections; larger pumps use Class 600 flanges.
- Heads of about 530–725 m, working pressure up to 75 bar
- Duplex stainless steel wet parts for seawater
- Supports plants from 500 to 12,500 tons of fresh water a day
- 50 Hz and 60 Hz sets
CNP-S-000064- Flow
- 5–540 m³/h
- Head
- up to 725 m
- Power
- 60–1120 kW
- Mains
- 50 Hz / 60 Hz
- Models
- 7
- Liquid temp.
- Seawater at ambient temperature (ambient up to 40 °C)
Sizes
| Size | Description | Rated flow | Flow range | Max pressure | Motor | Connection | Models |
|---|---|---|---|---|---|---|---|
| VMHP20-12×2 | High-pressure pump for seawater reverse-osmosis desalination (R/O) | 20 m³/h | 5–22 m³/h | 75 bar | 60 kW | See model dimensions | 1 |
| VMHP20-18×2 | High-pressure pump for seawater reverse-osmosis desalination (R/O) | 20 m³/h | 5–22 m³/h | 75 bar | 60 kW | See model dimensions | 1 |
| VMHP42-10-2×2 | High-pressure pump for seawater reverse-osmosis desalination (R/O) | 42 m³/h | 20–45 m³/h | 75 bar | 104 kW | See model dimensions | 1 |
| VMHP42-15×2 | High-pressure pump for seawater reverse-osmosis desalination (R/O) | 42 m³/h | 20–45 m³/h | 75 bar | 104 kW | See model dimensions | 1 |
| VMHP130-6 | High-pressure pump for seawater reverse-osmosis desalination (R/O) | 130 m³/h | 80–160 m³/h | 75 bar | 355 kW | See model dimensions | 1 |
| VMHP210-6 | High-pressure pump for seawater reverse-osmosis desalination (R/O) | 210 m³/h | 100–250 m³/h | 75 bar | 560 kW | See model dimensions | 1 |
| VMHP520-5 | High-pressure pump for seawater reverse-osmosis desalination (R/O) | 520 m³/h | 200–540 m³/h | 75 bar | 1120 kW | See model dimensions | 1 |
Models
Filter by duty point, mains frequency or size. Click a model for its performance curve and data.
| Model | Size | Stages | Hz | Motor kW | Flow m³/h | Head m | rpm | kg | |
|---|---|---|---|---|---|---|---|---|---|
| VMHP20-18×2 | VMHP20-18×2 | — | 50 | 60 | 5–22 | 612–678 | 2950 | 955 | CurvePDF |
| VMHP42-15×2 | VMHP42-15×2 | — | 50 | 104 | 20–45 | 597–725 | 2950 | 1095 | CurvePDF |
| VMHP130-6 | VMHP130-6 | — | 50 | 355 | 80–160 | 578–618 | 2950 | 1400 | CurvePDF |
| VMHP210-6 | VMHP210-6 | — | 50 | 560 | 100–250 | 550–657 | 2950 | 1458 | CurvePDF |
| VMHP520-5 | VMHP520-5 | — | 50 | 1120 | 200–540 | 533–678 | 2950 | 12090 | CurvePDF |
| VMHP20-12×2 | VMHP20-12×2 | — | 60 | 60 | 5–22 | 612–650 | 3550 | 865 | CurvePDF |
| VMHP42-10-2×2 | VMHP42-10-2×2 | — | 60 | 104 | 20–45 | 599–682 | 3550 | 1015 | CurvePDF |
Performance range
Every model of the VMHP (R/O high-pressure) range on one chart: each line is the performance curve of one model. Click a line or dot to open that model with its full data.
- VMHP20-18×2
- VMHP42-15×2
- VMHP130-6
- VMHP210-6
- VMHP520-5
- VMHP20-12×2
- VMHP42-10-2×2
Logarithmic scales. Published catalogue data for clean water; the correct model for your duty is confirmed by our engineers.
Dimensions & weight
Net weight and the main dimensions of each model, in millimetres, from the catalogue. Open a model for the labelled dimension drawing.
| Model | Hz | Weight (kg) | L | base_length | B | H | H1 | io_distance | inlet_dia |
|---|---|---|---|---|---|---|---|---|---|
| VMHP20-18×2 | 50 | 955 | 2516 | 2330 | 946 | 645 | 340 | 860 | 63 |
| VMHP42-15×2 | 50 | 1095 | 2515 | 2316 | 1020 | 700 | 365 | 920 | 76 |
| VMHP130-6 | 50 | 1400 | — | — | — | — | — | — | — |
| VMHP210-6 | 50 | 1458 | — | — | — | — | — | — | — |
| VMHP520-5 | 50 | 12090 | 5473 | 5000 | — | — | — | — | — |
| VMHP20-12×2 | 60 | 865 | 2096 | 1910 | 946 | 645 | 340 | 860 | 63 |
| VMHP42-10-2×2 | 60 | 1015 | 2115 | 1916 | 1020 | 700 | 365 | 920 | 76 |
Spare parts for VMHP (R/O high-pressure)
Parts list of the series with the material of each part. To order, send the model code and the part you need.
| No. | Part | Material | Standard | Applies to | |
|---|---|---|---|---|---|
| Wet parts | Duplex stainless steel; profile parts super austenitic stainless steel; seawater-resistant mechanical seal rings | — | All sizes |
Technical data
Liquid temperature
- Seawater at ambient temperature (ambient up to 40 °C)
Ambient conditions
- Up to 40 °C, altitude up to 1000 m
Motor
- TEFC 2-pole three-phase asynchronous motor, IP55, insulation class F; 3×380 V, 660 V, 3000 V or 6000 V at 50 Hz
- TEFC 2-pole three-phase asynchronous motor, IP55, insulation class F; supply as printed for 60 Hz
Supply voltage
- 3 x 380 V
Typical applications
- R/O seawater desalting systems (VMHP)
- Boosting seawater pressure of pressure-exchange energy recovery systems and feeding the R/O membranes (CH)
Pumped liquid
- Seawater. Wet parts are duplex and super austenitic stainless steel with anti-seawater mechanical seal rings. Maximum working pressure 75 bar (VMHP and CH62.5-20-1), 63 bar for the other CH models.
Data basis
- 50 Hz, constant motor speed 2950 rpm, 20 °C air-free water, kinematic viscosity 1 mm²/s; curve tolerance ISO 9906:2012 Grade 3B
- 60 Hz, constant motor speed 3550 rpm, 20 °C air-free water, kinematic viscosity 1 mm²/s; curve tolerance ISO 9906:2012 Grade 3B
Performance values are taken from the published CNP catalogue data. Our engineers confirm the final selection for your liquid, temperature, supply and site before quoting.
