Horizontal cooling-tower pump

WLTSF (horizontal, stainless flow parts)

Horizontal cooling-tower pumps with stainless steel flow passage parts, DN65–DN150

As WLTS with a precision-cast stainless steel casing and pump cover, giving a smoother flow passage and better corrosion resistance. 50 Hz only.

Large flow, low head: 30–300 m³/h, up to 9 m
Liquid temperature -15 to +100 °C, working pressure up to 6 bar
Back-pull-out structure with motor fixed on a base for easy installation and service
Closed cooling-tower and condenser water circulation, unit-equipment cooling

View 8 models Find a pump

WLTSF (horizontal, stainless flow parts)

Flow: 35–300 m³/h
Head: up to 7 m
Power: 1.1–7.5 kW
Mains: 50 Hz
Models: 8
Liquid temp.: -15 to +100 °C

Sizes

Size	Description	Rated flow	Flow range	Max pressure	Motor	Connection	Models
WLTSF65	Horizontal cooling-tower pump, extended shaft with stainless steel flow passage parts, DN65	40 m³/h	35–50 m³/h	6 bar	1.1 kW	Flange DN65	1
WLTSF80	Horizontal cooling-tower pump, extended shaft with stainless steel flow passage parts, DN80	55 m³/h	50–70 m³/h	6 bar	1.5 kW	Flange DN80	1
WLTSF100	Horizontal cooling-tower pump, extended shaft with stainless steel flow passage parts, DN100	100 m³/h	55–150 m³/h	6 bar	2.2 kW	Flange DN100	2
WLTSF125	Horizontal cooling-tower pump, extended shaft with stainless steel flow passage parts, DN125	165 m³/h	120–200 m³/h	6 bar	3–4 kW	Flange DN125	2
WLTSF150	Horizontal cooling-tower pump, extended shaft with stainless steel flow passage parts, DN150	235 m³/h	190–300 m³/h	6 bar	5.5–7.5 kW	Flange DN150	2

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
WLTSF65-5/1.1	WLTSF65	—	50	1.1	35–50	3.6–5.8	2900	38.5	Curve PDF
WLTSF80-5/1.5	WLTSF80	—	50	1.5	50–70	3–6.4	2900	46	Curve PDF
WLTSF100-5A/2.2	WLTSF100	—	50	2.2	55–100	4.3–7	1450	74	Curve PDF
WLTSF100-5/2.2	WLTSF100	—	50	2.2	100–150	3.5–6.2	1450	74	Curve PDF
WLTSF125-5A/3	WLTSF125	—	50	3	120–180	3.9–6.2	1450	89	Curve PDF
WLTSF125-5/4	WLTSF125	—	50	4	150–200	4.1–5.9	1450	100	Curve PDF
WLTSF150-6A/5.5	WLTSF150	—	50	5.5	190–270	4.8–7.2	1450	135	Curve PDF
WLTSF150-6/7.5	WLTSF150	—	50	7.5	200–300	4.5–7.4	1450	147.5	Curve PDF

Performance range

Every model of the WLTSF (horizontal, stainless flow parts) 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.

WLTSF65
WLTSF80
WLTSF100
WLTSF125
WLTSF150

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)	L1	H	H1	L2	L3	L7	L9
WLTSF65-5/1.1	50	38.5	490	240	120	278	100	295	215
WLTSF80-5/1.5	50	46	544	270	130	295	105	311	230
WLTSF100-5A/2.2	50	74	664	380	180	400	155	355	250
WLTSF100-5/2.2	50	74	664	380	180	400	155	355	250
WLTSF125-5A/3	50	89	676	412	212	450	175	367	250
WLTSF125-5/4	50	100	685	412	212	450	175	374	280
WLTSF150-6A/5.5	50	135	712	462	232	510	195	424	350
WLTSF150-6/7.5	50	147.5	752	462	232	510	195	424	350

Spare parts for WLTSF (horizontal, stainless flow parts)

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
1	Casing	Stainless steel ZG07Cr19Ni9	AISI 304	All sizes
2	Impeller	Stainless steel ZG07Cr19Ni9	AISI 304	All sizes
3	Blade mechanical seal	Silicon carbide / tungsten carbide	—	All sizes
4	O-ring seal	NBR	—	All sizes
5	Pump cover	Stainless steel ZG07Cr19Ni9	AISI 304	All sizes
6	Pump head	Cast iron HT200	ASTM 25B	All sizes
7	Shaft	Stainless steel 20Cr13	AISI 420	All sizes
8	Base	Q235-B	AISI A570	All sizes
9	Motor	—	—	All sizes

Technical data

Liquid temperature

-15 to +100 °C

Ambient conditions

Up to +40 °C

Motor

TEFC motor, IP55, insulation class F; 1×220 V or 3×380 V at 50 Hz

Supply voltage

1 x 220 V
3 x 380 V

Typical applications

Water circulation of closed cooling towers and condensers
Cooling of various unit equipment
Large-flow, low-head duties

Pumped liquid

Clean, thin, non-corrosive, non-flammable and non-explosive liquid without solid grains or fibres. A viscous or dense liquid lowers the performance curve and raises energy consumption.

Data basis

50 Hz, 2900 / 1450 rpm, 3×380 V, clean water at 20 °C without solid impurities or air; use within the bold part of each curve

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.