YK10-0015-DI-002-03
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3.4 Cooling Water Piping
Install the piping in reference to Figs. 3 and 4.
Do not confuse between the cooling water inlet and outlet.
CAUTION
●Be sure to feed cooling water by the amount or more specified in
"Table 2: Specifications."
If the amount of water becomes lower than the specified value
especially during the operation at a high suction pressure, the pump
temperature may increase and it damages the pump.
It is recommended to set up a flowmeter for cooling water and
provide an interlock that stops the pump when the amount of water
becomes lower that the specified value.
●When the operation stopped in winter, the water piping and the pump
have a risk of breaking by freeze-up of the water inside. Open the
cooling water outlet during operation stop and storage to discharge
the water inside by blowing in the pneumatic air through the cooling
water inlet.
CAUTION
●If you use several pumps, be sure to connect the cooling water pipes
parallel. Cooling capacity might come down if connected them serial
and cause the failure.
●You should put a filter at the front stage if you are obliged to use the
water containing much impurity such like water stain, iron and the
like.
●If the source is at a distance from the exhaust port or if the piping
has a difference in height (the drainage is lifted to a point higher
than the pump), a sufficient flow rate may not be provided.
In such a case, keep the sufficient flow rate in such a way as to
change the piping layout, make the piping thicker, or increase the
supply pressure within the specification range.
CAUTION
●Be sure to put in the Insert if you use any plastic made product such
as nylon tube. Such a tube is likely to cause deformation or get rigid
as secular distortion and might cause a water leakage.
●Keep the environment that does not cause dew formation when the
cooling water temperature was lower.
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