PRODUCTS

IL

Design

Glanded pump in in-line design with flange connection

Application

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


Type key
Example	IL 40/1604/2
IL	In-line pump
40	Nominal diameter DN of the pipe connection
160	Nominal impeller diameter
4	Rated motor power P₂ in kW
2	Number of poles

Special features/product advantages

High-efficiency motors as standard; from 0.75 kW nominal motor power: motors with IE2 technology
Reduced life cycle costs due to optimised efficiency
Standard condensate drainage holes in the motor housings
Can be used flexibly in air-conditioning and cooling systems, with application benefits due direct draining of condensate via optimised lantern design (patented)
High corrosion protection thanks to cataphoretic coating
Bidirectional mechanical seal with forced flushing
High worldwide availability of standard motors (according to Wilo specifications) and standard mechanical seals
Easy to install due to feet with threaded holes on pump housing

Technical Data

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 250
Max. operating pressure 16 bar (25 bar on request)

Description/Design

Single-stage, low-pressure centrifugal pump in in-line design with
Mechanical seal
Flange connection with pressure measuring connection R 1/8
Lantern
Coupling
IEC standard motor

Materials

Pump housing and lantern: Standard: EN-GJL-250; optionally spheroidal cast iron EN-GJS-400-18-LT
Impeller: Standard: EN-GJL-200; Special version: Red brass G-CuSn 10
Shaft: 1.4122
Mechanical seal: AQEGG; other mechanical seals on request

Scope of delivery

Pump
Installation and operating instructions

Options

L1 variant with red brass impeller (at additional charge)
H1 variant with housing made of spheroidal cast iron (at additional charge)
P4 variant for maximum operating pressure of 25 bar (see Wilo price list)
Motors with efficiency class IE3, other voltages and frequencies, as well as ATEX approval on request

Accessories

Mounting brackets for installation on a base
PTC thermistor sensor, PTC resistor tripping relay
Special motors
Special mechanical seals
Control systems CC-HVAC, VR-HVAC and switchgear

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 www.europump.org/efficiencycharts