Horizontal seawater lift pump

CH (seawater lift)

Horizontal seawater lift pumps for R/O pressure-exchange energy recovery systems

Horizontal pumps that boost seawater pressure in a pressure-exchange energy recovery system and feed the R/O membranes. Duplex and super austenitic stainless steel wet parts, seawater-resistant seals, compact TEFC motor drive.

Flow 30–720 m³/h at 32–44 m
Maximum working pressure 63 bar (75 bar for CH62.5-20-1)
Duplex stainless steel wet parts, IP55 TEFC motor

View 4 models Find a pump

Flow: 30–720 m³/h
Head: up to 44 m
Power: 11–75 kW
Mains: 50 Hz
Models: 4
Liquid temp.: Seawater at ambient temperature (ambient up to 40 °C)

Sizes

Size	Description	Rated flow	Flow range	Max pressure	Motor	Connection	Models
CH62.5-20-1	Horizontal seawater lift pump (feeds the R/O pressure-exchange energy recovery system)	62.5 m³/h	30–65 m³/h	75 bar	11 kW	See model dimensions	1
CH125-100-315	Horizontal seawater lift pump (feeds the R/O pressure-exchange energy recovery system)	120 m³/h	40–190 m³/h	63 bar	18.5 kW	See model dimensions	1
CH200-150-315	Horizontal seawater lift pump (feeds the R/O pressure-exchange energy recovery system)	250 m³/h	100–400 m³/h	63 bar	45 kW	See model dimensions	1
CH250-200-315	Horizontal seawater lift pump (feeds the R/O pressure-exchange energy recovery system)	500 m³/h	300–720 m³/h	63 bar	75 kW	See model dimensions	1

Models

Filter by duty point, mains frequency or size. Click a model for its performance curve and data.

Model table (PDF)

Model	Size	Stages	Hz	Motor kW	Flow m³/h	Head m	rpm	kg
CH62.5-20-1	CH62.5-20-1	—	50	11	30–65	33–44	2950	170	Curve PDF
CH125-100-315/18.5	CH125-100-315	—	50	18.5	40–190	20.5–30.4	2950	409	Curve PDF
CH200-150-315/45	CH200-150-315	—	50	45	100–400	31.6–38.2	2950	720	Curve PDF
CH250-200-315/75	CH250-200-315	—	50	75	300–720	31.5–39.5	2950	894	Curve PDF

Performance range

Every model of the CH (seawater lift) 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.

CH62.5-20-1
CH125-100-315
CH200-150-315
CH250-200-315

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)	flange_inlet_dn	flange_outlet_dn
CH62.5-20-1	50	170	—	—
CH125-100-315/18.5	50	409	125	100
CH200-150-315/45	50	720	200	150
CH250-200-315/75	50	894	250	200

Spare parts for CH (seawater lift)

Parts list of the series with the material of each part. To order, send the model code and the part you need.

Parts list (PDF) Request spare parts quote

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

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

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.