Wilo Pumps Design
Glanded wilo pumps in in-line design with flange connection
Application in the water Of 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
Type key of Wilo Pumps
| Example | IL 40/160-4/2 |
| 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 Of Wilo Pumps
- Reduced life cycle costs thanks to optimized efficiency
- Standard condensate drainage holes in the motor housings
- 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
- High worldwide availability of standard motors (according to Wilo specifications) and standard mechanical seals
Technical data
- Minimum Efficiency Index (MEI) to ≥ 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 250
- Max. operating pressure 16 bar (25 bar on request)
Description/design Of Wilo Pumps
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 Wilo Pumps
- 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 wilo pumps
- 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 of Wilo Pumps
- Mounting brackets for installation on a base
- PTC thermistor sensor, PTC resistor tripping relay
- Special motors
- Special mechanical seals
- SC-HVAC, CC-HVAC, VR-HVAC control systems 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 wilo pumps 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