9
causing unnecessary damage to the pump.
5.2 Operating Temperature
(1) Operating temperature may change the fluid’s viscosity, vapor pressure, and
corrosiveness. Please ensure that your pump is operating within the proper temperature
range.
(2) The optimal temperature range for pumping pure water:
Body material PPG
：
0
～
70
o
C
Body material ETFE+CF
：
0
～
90
o
C
(3) Please consult the distributor for the temperature range suitable for your chemicals.
(4) We recommend the operating environmental temperature to be between 0
o
C~40
o
C.
When the pump is used to feed a hot liquid, do not touch the front cover or the
piping with your bare hands. It may cause burns. Any reachable hot surfaces,
including pumps, motors and piping, must provide isolate device and display
obvious warning signs for high temperature.
5.3 Concentrations, Viscosity and Specific Gravity
(1) A change in a fluid’s concentration will usually affect its viscosity and specific gravity.
Other physical properties like corrosiveness, may also change with the fluid’s
concentration, therefore, the selected pump material should be able to withstand the
corrosive properties of the fluid.
(2) When the fluid’s viscosity and/or Specific Gravity differ from that of water, the shaft
power, flow rate and pump head may change also.
5.4 Particle Size (Sludge)
(1) The service life of a pump can be greatly shortened by pumping fluids that carry small
particles or sludge. Its service life is dependent on the concentration of the particles, its
size, and hardness.
(2)
For particle concentration less than 5%, particle size smaller than 50μm, and hardness
within 80Hs, which has SiC bushings, can be used. However, a shorter-than-normal
service life can be expected.
Should foreign matter enter the pump, it may cause pump damage or failure.
Turn off the power at once and remove the obstruction.
5.5 Maximum Operating Pressure
The pump’s maximum operating pressure is dependent on the operating temperature
and the structure of the pump. Please refer to figure 5.1 for the recommended maximum
operating pressure for our TEM SERIES pumps.
Содержание TEM Series
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