[12]
Use of slurry liquid
In principle, slurry liquid pumping is not possible. However, pumps with ceramic bearings (AA, and KK types
only) can handle the pumping of slurry liquid with a density of 5wt% or less, grain size of 50 µm or less, and
hardness of 80Hs or less. Prior to pumping such slurry liquid, be sure to confirm the operation feasibility with
the supplier.
[13]
Influence of specific gravity and viscosity of liquid on pump performance
If the specific gravity or viscosity of the liquid is higher than that of pure water, the shaft power, discharge
volume, and pump head may vary somewhat. The delivered pump has been prepared to meet the specifications
ordered by the user. To change the operating conditions after delivery, be sure to contact the supplier.
[14]
Intermittent operation
Frequent start/stop switching considerably shortens the service life of the pump. Try to limit the switching
frequency to six times or less per hour.
[15]
Temperature humidity fluctuation
Temperature fluctuation may not change the performance of the pump itself. However, the liquid may change
in terms of its viscosity, pressure, or corrosion resistance. Pay special attention to changes in liquid
characteristics as a result of temperature fluctuation.
* The liquid temperature range for the pump using the O ring supplied by AFLAS
®
is 10
~
90 ˚C.
* Refer to the corrosion resistance table for the temperature ranges recommended for various types of liquid.
For inquiries or consultation, contact the dealer you placed your order with.
* Some types of pumps can be operated in the temperature range of 90
~
100 ˚C. For details, contact your
dealer.
[16]
Disengagement of magnet coupling
Though the motor is running, the liquid is not circulated. (The pressure gauge on the discharge side points to "0"
point approximately.)
When the magnet coupling disconnects, stop the pump within 1 minute. If operation is continued with the
coupling in the disconnected mode, the power of the coupling will decrease considerably.
[17]
Removal of grease (For AA type only)
Fluorocarbon grease is applied over the bearing in the AA type pump. The grease may, depending on the type
of liquid, melt into the liquid. Contact your dealer if you do not want the application liquid to be mixed with the
grease.
- 19 -
Liquid temperature range: 0~100 ˚C (pure water)
< 90~100 ˚C for the model MDF-L 250, 401 and 505 with code symbol "-H", "-EH", or "-DH" >
Ambient temperature range: 0~40 ˚C
Humidity range: 35~85%RH
