Lowara NSCS 250-315/450/W45VDC4 400v 703741590

Name: Lowara NSCS 250-315/450/W45VDC4 400v 703741590
Brand: Lowara
SKU: 8190-250-315/450
Price: 14716.8 GBP
Availability: InStock

In stock

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Established 1975
Trusted by thousands of customers

The Lowara NSCS 250-315/450/W45VDC4 (703741590) is an end-suction centrifugal pump from the Lowara e-NSC range, close-coupled with stub shaft and rigid coupling, with a ductile iron casing, cast iron impeller and a 45 kW 4-pole motor (~1450 rpm) for a 400 V three-phase supply. It delivers up to 1036 m³/h (288 l/s) and up to 22.7 m of head.

A rigid coupling joins the pump shaft to a standard motor shaft extension. Back pull-out design lets the motor, adapter and impeller come out without disturbing the pipework. DN250 flanged discharge and a silicon carbide/carbon/EPDM mechanical seal, for clean water in heating, cooling, water supply and industrial process systems.

22.7 m

Max. head

1036 m³/h

Max. flow

45 kW

Motor

DN250

Discharge

4-pole 1450 rpmEnd-suctionDuctile ironStub shaftPart no. 703741590

End-suction pumps are chosen on the duty point — the flow you need and the head at that flow. Send us your duty and system details and we’ll confirm the right pump and impeller before you order.

Full Description

More about this product

Full Description

Key specifications

Model	Lowara NSCS 250-315/450/W45VDC4
Lowara part no.	703741590
Type	End-suction centrifugal pump, close-coupled with stub shaft and rigid coupling
Discharge	DN250 flanged
Motor	45 kW, 4-pole (~1450 rpm), IP55, class F insulation
Power supply	3 × 380–415 / 660–690 V three-phase, 50 Hz
Impeller diameter	273 mm
Max. head (zero flow)	22.7 m
Max. flow	1036 m³/h (288 l/s) at 10 m head
Max. hydraulic efficiency	83.1%
Casing	Ductile iron
Impeller	Cast iron
Mechanical seal	Silicon carbide / carbon / EPDM
Liquid temperature	−25 to +120°C
Max. operating pressure	16 bar up to 90°C, 10 bar at 120°C
Counter-flanges	Not included

Features

Back pull-out

Service the motor, seal and impeller without breaking the pipe joints.

High efficiency

ErP-compliant hydraulics and high-efficiency motors keep running costs down.

Interchangeable seal

Standard mechanical seal with wear rings for long service life.

Robust build

Heavy cast casing for continuous duty in commercial and industrial systems.

Built for

HVAC

Heating and chilled water circulation.

Water supply

Pressure boosting, transfer and treatment.

Industry

Process heating, cooling and heat recovery.

Washing

Washing and cleaning systems.

FAQs

How much will it pump?

Up to 1036 m³/h (288 l/s) with 10 m of head still available, and up to 22.7 m of head at zero flow. Choose the pump so your duty point sits near the middle of the curve.

What power supply does it need?

3 × 380–415 / 660–690 V three-phase, 50 Hz.

Can it pump hot water?

Yes — with the standard seal it handles −25 to +120°C, rated 16 bar up to 90°C and 10 bar at 120°C.

Are counter-flanges included?

No — counter-flanges, bolts and gaskets are ordered separately. Ask us and we’ll add the right set.

Downloads

data sheet PDF
Download

Delivery Information

Standard delivery:
Standard delivery is free on most orders. Some items may incur a delivery charge depending on weight, size or value. Any applicable charge will be displayed at checkout.

Deliveries will typically be made between 7am and 6pm, Monday to Friday (excluding public holidays).

Next day delivery:
Next working day delivery is available for a £16.50 + VAT delivery charge.

Orders must be placed before 12 noon to qualify for next working day delivery. Orders placed after 12 noon on Thursday but before noon on Friday will be delivered the following Monday. Orders placed after 12 noon on Friday will be delivered on Tuesday.

Pallet/Large/Difficult items:
Some large, heavy or difficult to transport items may incur an additional delivery charge. Please contact us for a delivery quote before ordering.

Frequently Asked Questions

Quick answers to common questions about the Lowara NSCS 250-315/450/W45VDC4 400v 703741590. For technical specifications, see the product details above; for sizing or installation advice, contact our team. If you have any other questions, we're happy to help.

What are centrifugal pumps used for?

Centrifugal pumps use a rotating impeller to move liquids and are commonly used for water transfer, circulation and industrial processes.

How do I choose a centrifugal pump?

Compare the required flow rate, total head, liquid characteristics and electrical supply with each pump’s performance curve.

Are centrifugal pumps suitable for dirty water?

Some are designed for clean water only, while others handle solids or wastewater. Check the particular pump’s permitted liquid and solids specification.