Description
14 EN
11|2018
3.4.1 Shaft seal material codes
Description
Code
according to
EN 12756
Material
Notice
Seal ring B
Carbon
graphite Ca
Resin-impregnated
Q1
Silicon carbide
SiC
Sintered, depressurised
U3
Tungsten carbide
TuC
CrNiMo binding agent
Bearing ring
A
Carbon graphite
Ca
Antimony impregnated
B
Carbon
graphite CA Resin-impregnated
Q1
Silicon
carbide
SiC
Sintered, depressurised
U3
Tungsten carbide
TuC
CrNiMo binding agent
Elastomer E
EPDM
EPDM
Ethylene-propylene rubber
V
FPM
FPM
Fluorocarbon rubber
X4
HNBR
HNBR
Hardened nitrile rubber
Spring G CrNiMo
steel
Other metal parts
G CrNiMo
steel
3.5
Product information according to 547/2012 (for water pumps with a maximum
shaft performance of 150 kW) for the 2009/125 EG standard “Eco design
guidelines”
•
Minimum efficiency index (MEI): See name plate on page 20.
•
The MEI reference value for water pumps with the best grade of efficiency corresponds to
≥
0.70.
•
Construction year: See name plate on page 20.
•
Manufacturer or trademark, official registration number and manufacturing site. See order documents
or data sheets.
•
Model description: See name plate on page 20.
•
Hydraulic pump grade of efficiency [%] with adjusted impeller diameter. See data sheet.
•
Characteristics, including efficiency characteristics. See characteristics.
•
The grade of efficiency of a pump with an adjusted impeller diameter is generally lower than that of
an impeller with a full diameter. The energy consumption is reduced due to the adjusted impeller, as
the pump is adjusted to a certain operating point. The MEI value is based on an impeller with a full
diameter.
•
A variable speed control which adjusts the pump operation to the system is recommended in order to
work more efficiently and economically at various operating points.
•
Information regarding installation, decommissioning and disposal.
•
Information regarding the efficiency reference value or reference value display for MEI = 0.7 (0.4) for
the pump on the basis of the sample in the figure which can be found under
http://www.europump.org/efficiencycharts.
