Sulzer VMS - Shaft Seal Material Code; Current

6 Installation, Operating and Maintenance Instructions (Original Instructions)
VMS Vertical Multistage Pumps
6
2.2 Shaft seal material code
Table 2. Shaft seal material code
Code acc. to EN 12756 Description Material Note
B
Q1
Q6
U3
eCarb-B
Spring loaded ring Carbon graphite
Silicon carbide
Tungsten carbide
Ca
SiC
TuC
Resin impregnated
Sintered pressureless
CrNiMo-binder
A
B
Q1
Q6
U3
V
eSic-Q7
Seat ring Carbon graphite
Carbon graphite
Silicon carbide
Tungsten carbide
Al-oxide
Ca
Ca
SiC
TuC
ALO
Antimony impregnated
Resin impregnated
Sintered pressureless
CrNiMo-binder
>99%
E
P
V
X4
Elastomers EPDM
NBR
FPM
HNBR
EPDM
NBR
FPM
HNBR
Ethylene propylene rubber
Nitrile-butadiene-rubber
Fluor carbon rubber
Hydrogenated nitrile rubber
G
F
Spring CrNiMo steel
CrNi steel
G
F
Other metal parts CrNiMo steel
CrNi steel
Information about seal combinations, types, pressure and temperature (see Table 7, “Seal code”).
2.3 Current
2.3.1 Nominal current VMS
The nominal allowable current of the motor is stated on the motor plate. This shows the nominal working range
of the motor and can be used to protect the motor.
Measuring the actual current of the pump during operation can be used to pre-set the motor protection switch to
protect the pump/motor combination.
This current value can also be used to determine the proper electrical equipment such as variable frequency
drive, main switch, wiring diameter etc.
Not only the motor, but also the pump has to be protected in its application.
2.3.2 Maximum current VMS H6
The maximum allowable current of the motor is mentioned as “I.max.” on the motor plate. This maximum
allowable current shows the maximum working range of the motor and can be used to protect the motor.
Be careful in using it this way, because, not only the motor, but also the pump has to be
protected in its application.
On the pump nameplate (sleeve sticker) this “required motor current” can be mentioned and it can be used to
pre-set the motor protection switch to protect the pump/motor combination.
This current value can also be used to determine the proper electrical equipment such as variable frequency
drive, main switch, wiring diameter etc.