Emerson EL-O-Matic F Series - Proof Test and Periodic Maintenance

15
September 2018
SIL Safety Manual
DOC.SILM.EF.EN Rev. 1
Periodic Test and Maintenance Requirements
NOTE:
• The ones listed above are the major failure modes of the main components
• In case of manual procedure, the detectable failure modes are the same as per
automatic procedure. The test coverage is lower than the one for automatic mode,
due to the human factor.
• The manual procedure cannot be considered as diagnostic. The test can be
considered as “non-perfect Proof Test”, and can be considered in the estimation of
PFD
AVG
, while it is not considered for the estimation of the SFF (safe failure fraction).
8.4 Proof Test and Periodic Maintenance
We advise to perform the following checks upon each proof test interval complying with
the rules and regulations of the country of nal installation:
• Visually check the entire valve operating system.
• Ensure there are no leaks on the pressurized parts.
• Check pneumatic connections for leaks. Tighten tube ttings as required.
• Check if manual override (where foreseen) is regular.
• Check if pneumatic lter cartridge (where foreseen) is sound and lter bowl (where
foreseen) has been cleaned properly.
• Check the setting of the relief valves (where foreseen).
• Verify that the power uid supply pressure value is within the required range.
• Remove built-up dust and dirt from all actuator surfaces.
• Inspect actuator paint work for damages to ensure continued corrosion
protection. Touch-up as required in accordance with the applicable paint
specication.
• Operate the Actuator/Valve assembly for 2 open/close complete cycles with
complete closing of the valve.
• Verify the correct performing of open – close operations (for example, check
locally, or automatically via Logic solver, the correct movement of the actuator).
The Installation, Operation and Maintenance manual denes a minimum maintenance
interval after 500.000 cycles for the El-O-Matic F-series actuators. This addresses
components that may have age related degradation. When the maintenance interval has
elapsed a complete overhaul of the actuator is required.
Section 8: Periodic Test and Maintenance Requirements