Horizontal cooling-tower pump

WLTS (horizontal, extended shaft)

Horizontal cooling-tower circulation pumps, extended-shaft structure, DN65–DN150

As WLT but the pump shaft is a separate extended shaft connected straight to the motor, so the pump end can be serviced without moving the motor. Available at 50 Hz and 60 Hz.

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 16 models Find a pump

Flow: 35–300 m³/h
Head: up to 9 m
Power: 1.1–7.5 kW
Mains: 50 Hz / 60 Hz
Models: 16
Liquid temp.: -15 to +100 °C

Sizes

Size	Description	Rated flow	Flow range	Max pressure	Motor	Connection	Models
WLTS65	Horizontal cooling-tower pump, extended-shaft structure, DN65	40 m³/h	35–50 m³/h	6 bar	1.1 kW	Flange DN65	3
WLTS80	Horizontal cooling-tower pump, extended-shaft structure, DN80	55 m³/h	50–70 m³/h	6 bar	1.5 kW	Flange DN80	2
WLTS100	Horizontal cooling-tower pump, extended-shaft structure, DN100	100 m³/h	55–150 m³/h	6 bar	2.2 kW	Flange DN100	3
WLTS125	Horizontal cooling-tower pump, extended-shaft structure, DN125	165 m³/h	120–200 m³/h	6 bar	3–4 kW	Flange DN125	5
WLTS150	Horizontal cooling-tower pump, extended-shaft structure, DN150	235 m³/h	190–300 m³/h	6 bar	5.5–7.5 kW	Flange DN150	3

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
WLTS65-5/1.1	WLTS65	—	50	1.1	35–50	3.6–5.8	2900	33.5	Curve PDF
WLTS80-5/1.5	WLTS80	—	50	1.5	50–70	3–6.4	2900	41	Curve PDF
WLTS100-5A/2.2	WLTS100	—	50	2.2	55–100	4.3–7	1450	66	Curve PDF
WLTS100-5/2.2	WLTS100	—	50	2.2	100–150	3.5–6.2	1450	66	Curve PDF
WLTS125-5A/3	WLTS125	—	50	3	120–180	3.9–6.2	1450	79	Curve PDF
WLTS125-5/4	WLTS125	—	50	4	150–200	4.1–5.9	1450	90	Curve PDF
WLTS150-6A/5.5	WLTS150	—	50	5.5	190–270	4.8–7.2	1450	123	Curve PDF
WLTS150-6/7.5	WLTS150	—	50	7.5	200–300	4.5–7.4	1450	132.5	Curve PDF
WLTS65-5A/1.1	WLTS65	—	60	1.1	35–50	3.4–5.8	3450	35	Curve PDF
WLTS65-5/1.5	WLTS65	—	60	1.5	50–70	2–6.4	3500	42	Curve PDF
WLTS80-5/2.2	WLTS80	—	60	2.2	55–100	2.3–9	3500	53	Curve PDF
WLTS100-5/3	WLTS100	—	60	3	100–150	3–6.3	1750	76	Curve PDF
WLTS125-5A/4	WLTS125	—	60	4	120–180	4.1–6.2	1750	91	Curve PDF
WLTS125-5/4	WLTS125	—	60	4	150–200	4.4–6.6	1750	91	Curve PDF
WLTS125-6/5.5	WLTS125	—	60	5.5	190–270	4.6–7.8	1770	112	Curve PDF
WLTS150-6/7.5	WLTS150	—	60	7.5	200–300	4.6–7.4	1770	138	Curve PDF

Performance range

Every model of the WLTS (horizontal, extended shaft) 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.

WLTS65
WLTS80
WLTS100
WLTS125
WLTS150

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
WLTS65-5/1.1	50	33.5	473	240	120	278	100	278	215
WLTS80-5/1.5	50	41	527	270	130	295	105	294	230
WLTS100-5A/2.2	50	66	647	380	180	400	155	338	250
WLTS100-5/2.2	50	66	647	380	180	400	155	338	250
WLTS125-5A/3	50	79	662	412	212	450	175	353	250
WLTS125-5/4	50	90	671	412	212	450	175	360	280
WLTS150-6A/5.5	50	123	695	462	232	510	195	407	350
WLTS150-6/7.5	50	132.5	735	462	232	510	195	407	350
WLTS65-5A/1.1	60	35	460	240	120	278	100	278	215
WLTS65-5/1.5	60	42	480	240	120	278	100	283	230
WLTS80-5/2.2	60	53	490	270	130	295	105	294	230
WLTS100-5/3	60	76	588	380	180	400	155	338	250
WLTS125-5A/4	60	91	620	412	212	450	175	360	280
WLTS125-5/4	60	91	620	412	212	450	175	360	280
WLTS125-6/5.5	60	112	686	412	212	450	175	404	350
WLTS150-6/7.5	60	138	725	462	232	510	195	407	350

Spare parts for WLTS (horizontal, extended shaft)

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	Cast iron HT200	ASTM 25B	All sizes
2	Impeller	Stainless steel ZG07Cr19Ni9	AISI 304	All sizes
3	Pump head	Cast iron HT200	ASTM 25B	All sizes
4	O-ring seal	NBR	—	All sizes
5	Blade mechanical seal	Silicon carbide / tungsten carbide	—	All sizes
6	Shaft	Stainless steel 20Cr13	AISI 420	All sizes
7	Base	Q235-B	AISI A570	All sizes
8	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
TEFC motor, IP55, insulation class F; 3×460 V at 60 Hz

Supply voltage

1 x 220 V
3 x 380 V
3 x 460 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
60 Hz, 3450 / 3500 / 1750 / 1770 rpm, 3×460 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.