Chiller Pump

Wilo Pumps - CronoNorm NL Series

Design Of Wilo Pumps


Single-stage low-pressure centrifugal Wilo Pumps with axial suction point, according to EN 733 and ISO 5199, mounted on a baseplate.


Application Wilo Pumps


  • For pumping heating water (in accordance with VDI 2035), water-glycol mixtures and cooling and cold water without abrasive substances in heating, cold water and cooling water systems
  • For applications regarding the municipal water supply, irrigation, building services, industry, power stations etc. (e.g. circulation, transfer and pressure-boosting tasks)


Type key of Wilo Pumps


Example NL 40/200B-11/2
NL Standard pump with axial suction
40 DN for the pressure flange
200B Nominal diameter of impeller
11 Rated motor power P2 [kW]
2 number of poles


Special features/product advantages of Wilo Pumps


  • Reduced life-cycle costs through optimised efficiency levels
  • Bidirectional, force-flushed mechanical seal
  • Low NPSH values, best cavitation properties
  • Shaft coupling with or without intermediate sleeve
  • Shaft deflection satisfies the requirements of ISO 5199


Technical data of Wilo Pumps


  • Minimum Efficiency Index (MEI) ≥ 0.4
  • Permissible temperature range of -20°C to +120°C
  • Mains connection 3~400 V, 50 Hz
  • Protection class IP 55
  • Nominal diameter DN 32 to DN 150
  • Max. operating pressure 16 bar


Scope of delivery


  • Wilo Pumps with free shaft end or
  • Wilo Pumps on baseplate with coupling and coupling protection or
  • Completely mounted pump on baseplate with electric motor
  • Installation and operating instructions


Materials of Wilo Pumps


  • Wilo Pumps housing and pressure lid: EN-GJL-250
  • Bearing bracket: EN-GJL-250
  • impeller: EN-GJL-250
    (special version: G-CuSn10)
  • Shaft: X20Cr13
  • Mechanical seal: AQ1EGG
    (other mechanical seals on request)


Description/design of Wilo Pumps


  • Wilo Pumps Single-stage low-pressure centrifugal pump as baseplate pump with axial suction piece with flanged bearing bracket and axis mounting for flexibly coupled drives.
  • Spacer coupling (sleeve coupling) available as an option; they make it possible to leave the motor in position when removing the rotor unit
  • Shaft deflection meets the requirements of ISO 5199




  • If pumps with 2900 rpm are installed inside residential buildings, then corresponding noise reducing measures are to be implemented.
  • Pump curves and specific motor powers depend on the respective fluid being pumped. Pump curves and power vary considerably when fluids are conveyed that differ from water in thickness and/or viscosity. For this, please observe the table “Recommended limit values for dimensioning”.
    The recommended limit values for dimensioning are calculated as follows:
    Qoptimum (volume flow at which the pump reaches its best efficiency), to be read from the individual pump curve; factors Qmin and Qmax , to be taken from the table “Recommended limit values for dimensioning”.Qmin dimensioning = Qmin x Qoptimum
    Qmax dimensioning = Qmax x Qoptimum
    Example: Size NL 32-125
    Qmin = 0.3 x 8 = 2.4 m3/h
    Qmax = 1.2 x 8 = 9.6 m3/h
  • Load-sensitive pump output
    All Wilo standard pumps are equipped with IEC standard motors. The Wilo control devices are suitable for automatic load-sensitive speed control of pumps that are driven by any standard motors of conventional manufacture.
  • Main/standby mode


Accessories Wilo Pumps


Automatic speed control:

for automatic, infinitely variable pump power control. for additional information, see “Switchgears and control devices” section.




Motors with efficiency class IE3, other voltages and frequencies on request


General notes – ErP (ecological design-) directive


  • The benchmark for most efficient water pumps is MEI ≥ 0.70
  • The efficiency of a pump with a trimmed impeller is usually lower than that of a pump with the full impeller diameter. The trimming of the impeller will adapt the pump to a fixed duty point, leading to reduced energy consumption. The minimum efficiency index (MEI) is based on the full impeller diameter.
  • The operation of this water pump with variable duty points may be more efficient and economic when controlled, for example, by the use of a variable speed drive that matches the pump duty to the system.
  • Information on benchmark efficiency is available at


Ebara Pumps - FSDA 50Hz & 60Hz

Features Ebara Pumps
  • Motor closed couple, alignment free construction.
  • Easy maintenance, BPO (Back Pull Out) feature allows all rotating elements to be removed without disconnecting suction and discharge pipework.
  • Top centreline discharge, foot support under casing for maximum resistance to misalignment and distortion from pipe loads.
  • Higher operating efficiency over a wider range of capacities, lowers operational cost.
  • Very compact design for ease of installation and permits minimum maintenance.


Applications Ebara Pumps
  • Water supply
  • Hot and cold water circulation
  • For cooling tower
  • Fire-fighting application
  • Irrigation
  • Industrial use
  • Drainage
  • Sprinkling
  • Air-conditioning
  • For swimming pool
  • Brine
  • Oils


Material Ebara Pumps
  • Casing cast iron, Impeller bronze, Bracket cast iron, Shaft 316 satinless steel, Mechacnical seal ceramic vs carbon.


Ebara Pumps CSA/CNA Series 50 Hz/60 Hz

Ebara Pumps Features

  • Very compact design for ease of installation and permits minimum maintenance.Axially split cassing allows the easy removal of the top cassing for inspection and service.
  • A wide range of performance with head up to 150m.
  • Highspeed drives and vertical mount available.
  • Anti-corrosion materials used on the rotating parts.
  • High quality sealed and cartridge type bearings units provide high durability.
  • High allowable working pressure and ensure stable running.
  • Mechanical seal for easy maintenance.


Ebara Pumps Applications

  • Water supply
  • Hot and cold water circulation
  • Industrial use
  • Irrigation
  • Drainage
  • Sprinkling
  • Air-conditioning


Ebara Pumps Material

  • Casing cast iron; optional Ductile cast iron (FCD), Impeller bronze (except 250×150 CNKA and 300×200 CNKA); SCS 13 for 250×150 CNKA; 300×200 CNKA, Shaft SUS 316; SUS 403; optional SUS 304, Shaft sleeve bronze.


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EVMU, EVMUL, EVMUG Series - Ebara Pumps

Stainless Steel Vertical Multistage Pumps


With initial hydraulic coverage to 100 GPM and 800 feet TDH, the EBARA Pumps model EVMU is designed for booster, water purification, and hot water applications pumps.

State-of-the-art formed stainless steel and several proprietary internal components make the EBARA pumps model EVMU superior to existing designs. The EVMU material is between 50 to 100% thicker than all current similar product offerings, for a true industrial design with cast stainless steel pumps flanges for maximum installation support.

EVMU 32, 45 and 64 models consist of cast iron or 304SS hydraulic assemblies. Different mechanical seal face options are available for the three models and incorporate a separate thrust bearing in lieu of motor bearings, a popular design feature.

Models EVMU3-18, EVMUL 3-64 pumps series are NSF/ANSI 61 Annex G listed

Specifications Pumps

  • Pumps Suction Size: 1 1/4″ to 4″ ANSI
  • Pumps Discharge Size: 1 1/4″ to 4″ ANSI
  • Range of HP: 1/2 to 50 HP
  • Capacity Pumps: 4 to 390 GPM
  • Head Pumps: 27 to 930 Ft.
  • Working pressure: 370 PSI (25 Bar) max. (see page technical section, page 813 for specific pressure information)
  • Pumps Temperature: 5 ̊ to +248 ̊F (-15 ̊ to 120 ̊C)
  • Liquid: clean water, hot water

Key Features Pumps

  • Standard NEMA motors
  • Integral thrust bearing on 3 HP and larger pumps – to handle axial thrust loads
  • Air vent in casing cover – allows proper venting, preventing air entrapment and dry run
  • Liner ring – self-aligning, floating design constructed to prevent swelling at high temperatures
  • Tungsten carbide lower pump bearings and sleeves – standard construction for all services, providing maximum operating life
  • Direct drive – pump and motor shafts are keyed for positive, reliable power transmission with no adjustments necessary
  • “Flexible” floating outer casing – allows for thermal expansion in hot water applications, preventing deformation due to pressure fluctuations
  • Anti-erosion measures – a dish-shaped insert is fitted to the intermediate casing designed to promote smooth flow and prevent high velocity areas

Applications Pumps

  • Municipal
  • Industrial
  • Agriculture
  • Pressure/water boosting pumps
  • Boiler feed
  • HVAC
  • Hot/Cold water circulation
  • Fire fighting
  • Filtration
  • Reverse osmosis
  • Washing systems
  • Filtration
  • Irrigation pumps