SK00-4802-DI-002-04
No.16.10.20
15
3.3 Water piping
Make connections so that the cooling water enters from the cooling water inlet at the upper part of
the pump body and then comes out of the cooling water outlet at the upper part of the evacuation
pipe.
For the cooling water, see Table 1. The cooling water inlet and outlet is ULK-04A/ULK-06A: Rc1/4,
ULK-10A/ULK-14A: Rc3/8. Attach the joints for water piping (nylon tubes etc.) to install the piping.
Use the supplied connectors.
Tube for connector supplied as standard: Outside diameter of 9.53 mm × Inside diameter of 6.99
mm.
(1) Be sure to supply the cooling water equal to or more than the amount
described in table 1. If the pump runs with an amount of water equal to
or lower than that specified, the pump temperature increases, causing
defects in the pump.
It is recommended to install a flowmeter for cooling water as an
interlock that stops the pump when the amount of water becomes
equal to or lower than that specified.
(2) When operation is stopped during wintertime, water in the water pipes
may be frozen, causing damage to them. When stopping the
operation, drain the water in the system in such a way as to blow air in
from the water inlet.
(1) When using several pumps, connect the cooling water pipes in
parallel. A series connection may make the cooling performance
insufficient, causing defects.
(2) It is recommend to set a filter in an upstream stage for filtration to
remove impurities, such as fur and iron contained.
(3) If the supply source and the drain port are apart or there is difference
in height between the pipes (in such a case where the drain port is
lifted to a position higher than the pump), a sufficient flow rate may
not be provided. In such a case, change the piping layout, replace the
pipes with larger ones, or increase the supply pressure within the
range of the specifications to secure a sufficient flow rate.
CAUTION
CAUTION
