Calpeda NR4 In-Line Centrifugal Pump

Calpeda NR4 In-Line Centrifugal Pump

In-Line Twin Centrifugal Pump

2 / 110 feb-39 0.25 / 7.5
mc/h m kW

This product is currently out of stock and unavailable.


Calpeda NR4 In-Line Twin Centrifugal Pump

The Calpeda NR4 close-coupled, single-impeller, centrifugal pumps; electric motor with extended shaft directly connected to the pump.

NR, NR4 series: Single head electropumps.
NRD, NRD4: Twin head pump with built-in automatic switching valve. The two head can operate singularly or in parallel.
Pump casing with suction and delivery connections with the same diameter and on the same axis (in-line).
Version with frequency converter (on request)

-For clean liquids without abrasives, which are non-aggressive for the pump materials ( solids content up to 0.2%).
-For heating, air-conditioning, cooling, and circulation plants.
-For civil and industrial applications.
-When low noise operation is required (n ≈ 1450 rpm).

Technical data

2-pole induction motor, 50 Hz (n ≈ 2900 rpm).
NR(D): three-phase 230/400 V ± 10% up to 3 kW;
400/690 V ± 10% from 4 to 18,5 kW.
NRM: single-phase 230 V ± 10%.

4-pole induction motor, 50 Hz (n ≈ 1450 rpm).
NR4: three-phase 230/400 V ± 10% up to 3 kW;
400/690 V ± 10% for 4 kW.
Insulation class F.
Protection IP 54.
Motor suitable for operation with frequency converter from 0,37 kW for NR4 and from 1,1 kW for NR(D).
IE3 efficiency class for three-phase motors (IE2 up to 0,65 kW).
Constructed in accordance with EN 60034-1; EN 60034-30-1. EN 60335-1, EN 60335-2-41.

For more information please visit CALPEDA




Calpeda is a company that is committed to studying, developing, and manufacturing pumps and pumping systems. We want to continue that which was started many years ago by Vinicio Mettifogo, founder and pioneer.

It all began like this

Calpeda appeared on the British market over 40 years ago. At the start, the products were sold by two independent distributors, and then all the business operations in the United Kingdom were grouped into a single company, MSP Planet Limited, with its base in Bicester. In 1995 Calpeda SpA proposed the idea of starting a directly controlled company to Ken Hall and David White. The initiative, which led to the formation of the Calpeda Limited branch, became more solid with the purchase of MSP Planet Limited and the transfer of all staff to the new organisation.

Even Bigger

Year after year the subsidiary grew and sales development was gradually accompanied by the enlargement of the company headquarters. After a move to a new 20,000 sqft facility the plant was doubled in size with the acquisition of further buildings and an important restructuring program was initiated, at a cost of £ 1.5 million, which includes a new assembly and service area, new offices, and a training centre. Calpeda Limited also has a technical centre in Pontefract - West Yorkshire which has generically grown over the years. Markets in the Republic of Ireland and Northern Ireland, are serviced by a subsidiary of the UK operation called Calpeda Pumps Ireland Limited, with its headquarters in Dublin.

Our strong points: product quality assurance and trained staff

Calpeda Limited supplies a wide range of Calpeda products to many industrial and commercial sectors, through a capillary distribution network and business-to-business platforms. Calpeda Limited also features a flexible, well-equipped, and experienced booster set, pressurisation, and specialist pump system production centre, mainly for the building services sector. The company has a strong expansion program with the aim of increasing sales and has recently invested in an important part of this growth strategy, namely after-sales services. Service is one of the branch’s strong points, the company is naturally made up of highly skilled, specialist Engineers, and a training project providing development opportunities to young Engineers is long established.