Disassembly And Re-Assembly; Repairs - Emerson Bettis XTE3000 Installation, Operation And Maintenance Manual

Installation, Operation and Maintenance Manual
MAN-02-04-97-0713-EN Rev. 1
C.8.2

Disassembly and Re-assembly

CAUTION
Using a fastener other than the approved type may result in damage to the actuator or
valve. Refer to Table 7.
CAUTION
Failure to use proper torque values can result in damage to the actuator and/or valve.
If disassembly and subsequent re-assembly of the explosion-proof enclosure is required,
take the necessary care to maintain all parts in their original condition.
To achieve this, the following steps must be taken:
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C.8.3

Repairs

When needed, repairs may only be carried out using spare parts supplied by the manufacturer.
WARNING
The values of gaps of explosion-proof joints are lower than the maximum specified on Tables
of IEC/EN 60079-1 Standard and the values of widths of the explosion-proof joints are greater
than the values specified in the tables of the Standard IEC/EN 60079-1. Should maintenance
require the replacement of any component that forms part of an explosion-proof joint, only
an original spare provided by Emerson can be used. Direct repair or reconstruction of the
above components is not permitted without Emerson authorization. Not performing this
procedure will invalidate the product safety and contractual guarantee.
Original spare parts must be ordered from the manufacturer; to ensure that correct spares
are provided, the serial number printed on the XTE3000 product label must be specified
when an order for spares is placed.
Appendix
Do not damage the explosion-proof mating surfaces on the housing and on the
electrical enclosure cover.
Reinstall all the screws that came with the dismantled parts and coat them with a
film of molybdenum-based grease. This will keep screws from sticking and make
maintenance future operations easier.
In case the screws need to be changed it is mandatory to assure that the new
screws are of the same dimension and same material as the original ones as stated
in this manual, or of a better quality.
Replace the weatherproof seals that may have been removed, i.e. O-Rings for
the cover.
In particular, be sure the joint surfaces of all enclosures are spread with a film of
Aeroshell grease.
Appendix
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