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STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com
Manual 5021, rev. 00 10/2015 – SC/VHS - 17 -
8.2 Special maintenance
Under normal condition the actuator don’t need special maintenance. If there are leaks in the hydraulic
cylinder or a malfunction in the mechanical components, or in case of scheduled preventive maintenance,
the actuator must be disassembled and seals must be replaced with reference to the attached sectional
drawing and adopting the following procedures.
Important
Before performing any maintenance operations use always wear protective gloves,
clothing, and eyewear when performing any maintenance operations.
Warning
Before proceeding with any maintenance operation the following instructions must be
respected:
- Disconnect any operating lines providing hydraulic pressure, electric power, or a
control signal to the actuator. Be sure the actuator cannot suddenly open or close
the valve
- Close the hydraulic feed line and make sure that there is no pressure in the
actuator cylinder and the control unit, to ensure safety of maintenance staff.
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