Teikoku USA | Chempump
Instruction Manual NC-Series 0220
10
ate in an overload condition. For frequencies beyond these limits
please consult Applications and Engineering.
2.3.7 Oil Filled Stator
Chempump
TM
pumps are designed to give long, trouble free ser-
vice without having their stator cavities oil filled. Solid filled or
non-oil-filled options are available for many applications. In order
to facilitate the dissipation of heat from the motor section, the
stator cavity on standard NC-Series pumps can be filled at the
factory with a heat conductive dielectric oil. This oil filling provides
better conductivity and allows the heat generated in the motor
to be conducted to the outside of the unit, thereby maintaining
a lower temperature in the motor section than would be possible
if the stator cavity were not oil filled. When storing or installing
oil filled stators, be sure that the motor lead or connection box
nipple is maintained in an upright vertical position.
2.3.8 Electrical Isolation
To eliminate electrolytic corrosion when handling solutions during
an electrolysis or plating operation, the NC-Series pump should
be electrically isolated. Insulated couplings or nonconductive plas-
Figure 2-2. Wiring Diagram 230/460 Volt, 3 Phase
tic piping must be used in the primary suction and discharge lines.
The pump must be isolated electrically from the tank, and sepa-
rately grounded.
2.3.9 Water and Steam Jackets
When handling fluids at controlled temperatures, additional mo-
tor cooling or heating must be provided. For temperature control,
jackets are provided for water, steam, or other heat transfer me-
dia. In addition, the pump can be submerged into the pumped
fluid, thus providing an additional means of temperature control.
All NC-Series pumps can be provided with removable type wa-
ter jackets (See
). This type jacket is easily removable
from the stator band to allow for inspection and replacement.
Removable-type water jacket kits are available from the factory
for provision or already installed in the field when additional sta-
tor cooling is required. These jackets are suitable only for heating
mediums compatible with the gasket and jacket material, with
maximum inlet pressure of 50 psi and with maximum tempera-
ture of 150° F. They should not be used as steam jackets. Jackets
welded to the stator band are available for use as steam jackets
and for liquid mediums which exceed the temperatures and pres-
sures noted above. Normally welded type jackets are suitable for
steam pressures to 50 psi and liquid medium pressures to 100 psi.
However, welded type jackets specially fabricated are also avail-
able for higher pressures.
2.3.10 Heat Exchanger
Similar to the water jacket in every respect except for the provi-
sion of corrosion-resistant tubing, heat exchangers, whether re-
movable, or welded-on, are provided on Chempump applications
that require heating or cooling the fluid before it enters the rotor
chamber. Heat exchangers are especially recommended for liquids
with low specific heat characteristics.
All NC-Series pumps can be provided with removable wrap around
heat exchangers when specified. This type jacket is easily removed
from the stator band to allow for inspection and replacement.
These heat exchangers are suitable for maximum inlet pressure
of 50 psi and maximum temperature of 150° F. See
.
Welded on heat exchangers are available on all NC-Series pumps.
These heat exchangers are suitable for steam pressure of 50 psi
and liquid medium pressures to 100 psi, where maximum temper-
atures vary depending upon existing motor insulation and TCO
setting as indicated on the pump nameplate. Refer to
for coolant rates.
2.3.11 Jacketed Circulation Tube
The jacketed circulation tube acts as a heat exchanger in that it
permits a heat transfer medium to circulate around the tubing
and heat or cool the fluid before it enters the rotor chamber. The
jacketed circulation tube is suitable for maximum inlet pressures
of 50 psi liquid, or 15 psi steam. Higher pressures are available on
special models.
Figure 2-3. Wiring Diagram 575 Volt, 3 Phase
