Flowserve LPS Pneumatic Heavy-Duty Actuator Series - Manual (Page 19)

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LPS Series Heavy-Duty Actuators FCD LFENIM0001-02-AQ – 5/15
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4
Maintenance Instructions
LPS Series actuators are designed to offer the greatest ease of operation during assembly, disassembly and
maintenance. The maintenance and disassembly do not require special equipment or special or large wrenches.
Furthermore the joints among the moving parts of the actuator are made exclusively through pins and not using bolts
to be tightened with specific torques.
LPS actuators do not need maintenance for long periods, even if they are working in severe conditions. The LPS
actuator features a 25-year design life depending on service conditions, proper installation, operating and maintenance.
In order to achieve this industry-leading design life, in-field maintenance is prescribed to be performed every six years
of operations.
However, if the actuator operation happens infrequently, it is recommended to periodically check the actuator,
performing the following steps:
• In the plants where it is possible, carry out a few opening and closing operations, involving all the control unit
components, checking that the actuator operates correctly and within the required stroking times.
• Check that all the signals (pneumatic and electric) arriving at the actuator are correct and that the supply fluid
pressure is within the required range. Check for the absence of leaks in the pneumatic connections. If necessary,
tighten the pipe fittings.
• Check the paint coating. If some areas are damaged due to accidental events, retouch them according to the painting
specifications.
In case of scheduled preventive maintenance, or following accidental events, refer to the following maintenance
instructions regarding the main actuator components (pneumatic cylinder and housing).
The actuator is furnished with lubricant sufficient for all its life cycle. In case of scheduled or extraordinary maintenance,
it is possible to lubricate the parts of the housing with the following greases:
For different conditions, contact your local Flowserve representative.
For standard temperature conditions
(-29 to +100°C)
For low temperature conditions
(lower limit -60°C)
Grease Characteristics* Grease Characteristics*
Worked Penetration [dmm] 280 Worked Penetration [dmm] 296
Dropping Point ASTM [°C] 190 Dropping Point ASTM [°C] 260+
Base Oil Viscosity at 40°C [mm 2 /s] 100 Base Oil Viscosity at -40°C [mm 2 /s] 3.1
* Grease suggested: AGIP MUP2 or equivalent * Grease suggested: AEROSHELL 7 or equivalent