En
gl
is
h (
G
B)
8
4.2.2 Type key
5. Servicing the product
Example
MTH 2 -6 /3 -A -W -A -A QQ V
Pump type
Rated flow rate [m
3
/h]
Number of chambers
Number of impellers
Pump version
A
Basic version
C
Inlet pipe
X
Special version
Pipe connection
W
Internal thread
WB NPT internal thread
Materials
A
Basic version
I
Stainless steel pump head
Shaft seal
A
O-ring seal with fixed seal driver
B
Bellows seal, rubber
C
O-ring seal with spring as seal driver
R
O-ring seal, type A, with reduced
seal faces
A
Carbon, metal-impregnated
B
Carbon, resin-impregnated
Q
Silicon carbide
U
Tungsten carbide
V
Metal oxides, ceramic
E
EPDM
V
FKM
WARNING
Electric shock
Death or serious personal injury
- Before starting any work on the product,
make sure that the power supply has
been switched off and that it cannot be
accidentally switched on.
- Connect the pump to an external main
switch close to the pump and to a
motor-protective circuit breaker or a
CUE frequency converter.
- Make sure you can lock the main switch
in OFF position (isolated). Type and
requirements as specified in EN 60204-
1, 5.3.2.
CAUTION
Toxic liquids
Death or serious personal injury
- Wear personal protective equipment.
CAUTION
Hot or cold liquid
Minor or moderate personal injury
- Wear personal protective equipment.
CAUTION
Hot or cold surface
Minor or moderate personal injury
- Make sure that no one can accidentally
come into contact with hot or cold
surfaces.
