Series description


Glanded double pump in in-line design with flange connection


Pumping of heating water (acc. to VDI 2035), cold water and water/glycol mixtures without abrasive substances in heating, cold water and cooling systems.

Type key

ExampleDL 40/160‐4/2
DLIn-line double pump
40Nominal diameter DN of the pipe connection
160Nominal impeller diameter
4Rated motor power P2 in kW
2Number of poles

Special features/product advantages

  • Reduced life cycle costs through optimised efficiency
  • Can be used flexibly in air-conditioning and cooling systems, with application benefits due to direct draining of condensate via optimised lantern design (patented)
  • High standard of corrosion protection thanks to cataphoretic coating
  • Main/standby mode or peak-load operation (by means of external auxiliary device)

Technical data

  • Minimum Efficiency Index (MEI) ≥ 0.4
  • Permissible temperature range -20 °C to +140 °C
  • Mains connection 3~400 V, 50 Hz (others on request)
  • Protection class IP 55
  • Nominal diameter DN 32 to DN 200
  • Max. operating pressure 16 bar


Single-stage, low-pressure double pump in in-line design with

  • Switchover valve
  • Mechanical seal
  • Flange connection with pressure measuring connection R 1/8
  • Lantern
  • Coupling
  • IEC standard motor


  • Pump housing and lantern: Standard: EN-GJL-250
  • Impeller: Standard: EN-GJL-200; special version: Bronze CuSn 10
  • Shaft: 1.4122
  • Mechanical seal: AQEGG; other mechanical seals on request

Scope of delivery

  • Pump
  • Installation and operating instructions


  • ...-L1 variant with bronze impeller (at additional charge)
  • Other voltages and frequencies as well as ATEX approval on request


  • Mounting brackets for installation on a base
  • PTC thermistor sensor, PTC resistor tripping relay
  • Special motors
  • Special mechanical seals
  • SC-HVAC, CC-HVAC control systems and switchgears
  • Blind flanges

General notes - ErP (ecological design-) directive

The benchmark for most efficient water pumps is MEI ≥ 0.70The 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 www.europump.org/efficiencychartsPumps with power consumption > 150 kW or a volume flow QBEP < 6 m3/h are not subject to the Ecodesign Directive for water pumps. Therefore, no MEI value is shown.

Duty chart

Wilo-CronoTwin-DL (2-pole)

Wilo-CronoTwin-DL (4-pole)


Approved fluids (other fluids on request)

Heating water (in accordance with VDI 2035)

Water-glycol mixtures (for 20-40 vol.% glycol and fluid temperature ≤ 40 °C)

Cooling and cold water

Heat transfer oil

Special version at additional charge

Permitted field of application

Standard version for operating pressure pmax

16 bar (up to +120 °C) bar

Temperature range at max. ambient temperature +40 °C

-20...+140 °C (depending on the fluid)

Max. ambient temperature

+40 °C

Installation in closed buildings

Outdoor installation

Special version at additional charge

Pipe connections

Threaded connection

Nominal connection diameters DN

32 - 200

Flanges (according to EN 1092-2)

PN 16

Flange with pressure-measurement connections

R 1/8


Pump housing






Impeller (special version)


Pump shaft


Mechanical seal


Other mechanical seals

On request

Electrical connection

Mains connection

3~400 V, 50 Hz

Nominal speed n

1450/2900 rpm


Protection class

IP 55

Insulation class


Speed control

Wilo control system

Motor winding up to 3 kW

230 V Δ/400 V Y, 50 Hz

Motor winding from 4 kW

400 V Δ/690 V Y, 50 Hz

Installation options

Pipe installation (≤ 15 kW motor power)

Support-bracket mounting


General overview

Edition 2017
Page format A4
Number of pages 72

PDF (46 MB)


ATEX Wilo-Crono... IL/DL/BL;
Wilo-Vero... IPL-N/DPL-N, IPS

Article Number 2140023
Edition 1702
Version number 02
Page format A4
Number of pages 21

PDF (1 MB)


Wilo-CronoLine-IL / Wilo-CronoTwin-DL / Wilo-CronoBloc-BL

Article Number 2116440, 2115095-97
Edition 1009
Version number 01
Page format 215,9 x 279,4 mm
Number of pages 40

PDF (4 MB)



PDF: Wilo-CronoTwin-DL


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