SMC Corporation HRS030-A-20 series, Original Instructions Manual, Page: 139 / 160

HRX-OM-R016
Chapter 8 Control, Inspection and Cleaning
HRS Series 8.2 Inspection and Cleaning
8-5

Replacement of circulating fluid

Clean the tank and replace the circulating fluid.

For the circulating fluid, select from the specification range shown
in
’’Table 8-1 Quality standard for fresh water (tap water)’’.

When using 15% ethylene glycol solution, check that the concentration is within the
range of 15% +5/-0.

Replacement of circulating fluid (For water cooled type)

Clean the facility water source and replace the facility water.

For the facility water, select from the specification range shown in
“Table 8-1 Quality
standard for fresh water (tap water)
”.
8.2.4 Inspection every 6 months

Check for water leakage from pump (For option T [High head pump])
Remove the panel and check the pump for excessive leakage. If the
leakage is found, replace the mechanical seal. Order the mechanical seal
described in “8.3 Consumables” as a service part.

Leakage from the mechanical seal
It is impossible to prevent the leakage from the mechanical seal completely
because of its structure. Although the leakage is described as 3cc/hr or less.

The recommend life time of the mechanical seal before needing replacement is
6000 to 8000 hours (usually 1 year)
Check point to see leakage
Fig. 8-3 Check for water leakage from pump