SMC Networks HRSH090-A, Руководство по эксплуатации

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HRX-OM-R026
Chapter 8 Control, Inspection and Cleaning
HRSH Series 8.2 Inspection and Cleaning
8-5
8.2.4 Inspection every 6 months

Check for water leakage from 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 “8.3Consumables” as a service part.
Fig. 8-3
Check for water leakage from pump

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.
Leakage was found here