MEI ≥ 0,4
What is the MEI index

A-MEI-RA
Hydraulic Efficiency
MEI ≥ 0,4

Ameira is the first line of DAB submersible pumps where all models have obtained a MEI index >= 0.4. It's the result of DAB's continuous work on energy efficiency priority.

Discover the importance of the MEI index to understand the performance of different pumps and choose the one that best suits your system.

A SINGLE VALUE FOR THE WHOLE EU MARKET

With the aim of defining a comparable performance threshold value among all water pumps present on the market, an index has been created which considers the size of the pump, its specific speed and rotation speed: the MEI (Minimum Efficiency Index).

The regulation applies to centrifugal pumps for pumping clean water included in these product categories:

Pumps with axial intake with support (ESOB)
Pumps with monobloc horizontal axial intake (ESCC)
Pumps with monobloc in-line axial intake (ESCCI)
Multistage vertical pumps (MS-V)
Multistage submerged pumps (MSS)

MEI represents a dimensionless indicator for hydraulic performance and is a measurement of the sizing of the pump with respect to its performance.

The higher the MEI value, the better the sizing of the pump with respect to its performance and the lower the yearly energy consumption due to use of the pump. The upper limit of the MEI values is theoretically open, and depends only on physical and technological limits.

The minimum efficiency index (MEI) is based on the maximum diameter of the impeller. Multistage submerged water pumps must undergo tests in a version with 9 stages. The reference value for the 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 adapts the pump to a fixed work point, with a consequent lower energy consumption.

The operation of this water pump with variable operating points may be more efficient and economic if controlled, for example, by means of a variable speed motor which adapts pump operation to the system.

You can find information on reference efficiency at the address: www.dabpumps.com or contact our sales network. You can find information on reference efficiency at the address: www.dabpumps.com or contact our sales network.

The efficiency graphs for MEI=0.7 and MEI=0.4 for the different types of pumps are available on the site: www.europump.org/efficiencycharts.

Download certifications PDF

Hydraulic Efficiency

EU Regulation 547/2012

Pump model P2 nominal
KW HP
MEI n PL% n BEP% n OL%
S4 1/13
0,37 0,5
≥ 0,4 34,2 36,4 36,1
S4 1/19
0,55 0,75
34,1 36,1 35,8
S4 1/26
0,75 1
34,5 36 35,7
S4 1/37
1,1 1,5
34,4 36 35,9
S4 1/48
1,5 2
34,3 35,9 35,5
S4 2/7
0,37 0,5
52,6 55,5 55
S4 2/10
0,55 0,75
52,4 55,5 55,2
S4 2/14
0,75 1
52,4 55,7 55,1
S4 2/20
1,1 1,5
52,1 55,3 55
S4 2/28
1,5 2
52 55,3 55
S4 2/40
2,2 3
52,5 55,3 54,9
S4 2/52
3 4
52,4 55,3 55
S4 3/6
0,37 0,5
55 58,9 58
S4 3/9
0,55 0,75
55 58,7 58
S4 3/13
0,75 1
54,9 58,5 57,8
S4 3/19
1,1 1,5
54,9 58,5 57,8
S4 3/25
1,5 2
54,9 58,3 57,6
S4 3/32
2,2 3
54,4 58,1 57,5
S4 3/39
2,2 3
54,3 58 57,5
S4 3/45
3 4
54,3 58 57,3
S4 3/51
3 4
54,2 57,9 57,1
S4 3/67
4 5,5
54,2 57,8 57
S4 4/4
0,37 0,5
60,4 64,0 63,2
S4 4/7
0,55 0,75
60,2 64,0 63,1
S4 4/9
0,75 1
60,2 63,7 63,1
S4 4/14
1,1 1,5
60,1 63,5 63,0
S4 4/19
1,5 2
60,0 63,5 63,0
S4 4/27
2,2 3
60,0 63,4 63,0
S4 4/35
3 4
60,0 63,4 62,9
S4 4/48
4 5,5
59,9 63,3 62,9
S4 4/62
5,5 7,5
59,9 63,3 62,8
S4 6/5
0,55 0,75
63,5 66,6 66,0
S4 6/7
0,75 1
63,3 66,5 65,9
S4 6/10
1,1 1,5
63,3 66,4 65,9
S4 6/14
1,5 2
63,3 66,4 65,8
S4 6/21
2,2 3
63,3 66,3 65,8
S4 6/29
3 4
63,2 66,3 65,6
S4 6/38
4 5,5
63,2 66,2 65,6
S4 6/52
5,5 7,5
63,1 66,1 65,5
S4 6/61
7,5 10
63,0 65,9 65,4
S4 8/5
0,75 1
65,6 69,0 68,2
S4 8/7
1,1 1,5
65,4 69,0 68,2
S4 8/9
1,5 2
65,4 68,8 68,2
S4 8/15
2,2 3
65,4 68,8 68,1
S4 8/21
3 4
65,4 68,6 68,0
S4 8/27
4 5,5
65,4 68,5 68,0
S4 8/35
5,5 7,5
65,3 68,4 67,9
S4 8/38
5,5 7,5
65,2 68,4 67,9
S4 8/47
7,5 10
65,2 68,2 67,8
S4 8/50
7,5 10
65,0 68,0 67,7
S4 12/6
1,1 1,5
62,2 66,5 65,4
S4 12/9
1,5 2
62,0 66,3 65,4
S4 12/13
2,2 3
62,0 66,3 65,4
S4 12/18
3 4
62,0 66,1 65,4
S4 12/24
4 5,5
62,0 66,0 65,3
S4 12/34
5,5 7,5
61,9 66,0 65,2
S4 12/44
7,5 10
61,8 65,9 65,2
S4 16/8
1,5 2
62,5 67,5 66,8
S4 16/12
2,2 3
62,5 67,5 66,8
S4 16/16
3 4
62,5 67,3 66,8
S4 16/21
4 5,5
62,3 67,3 66,6
S4 16/29
5,5 7,5
62,3 67,1 66,5
S4 16/38
7,5 10
62,0 66,9 66,3
Download certifications PDF
In case of replacement

AMEIRA RANGE: THE SOLUTION IN CASE OF REPLACEMENT

Thanks to the infinite possibility of customization and the standard construction accessories, Ameira is the ideal borehole pump for replacement on existing installations. Also of other brands.

Discover the correspondence with other brands models

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Hydraulic Efficiency