Maintenance; Membrane Filter Element Replacement; Glycol Absorption Cartridge Replacement - Michell Instruments PROMET EExd Installation, Operation & Maintenance Manual

PROMET EExd Process Moisture Analyzer Sampling Systems
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5.

MAINTENANCE

WARNING This system operates under high pressure. Isolate and depressurise the
sampling systems before attempting any maintenance or servicing.
Maintenance of the PROMET EExd Process Moisture Analyzer Sampling System should
be done in conjunction with the maintenance instructions of the PROMET EExd Process
Moisture Analyzer Users Guide prior to commencing any maintenance.
Routine maintenance of the system is confined to filter element replacements.
5.1

Membrane Filter Element Replacement

Used on Natural Gas systems only!
Life expectancy of the filter element is dependent upon operating conditions in each
specific application. As a minimum, it is recommended that the membrane filter
element be changed every 12 months. If inspection of the removed element shows that
it is in poor/good condition after 12 months operation then the operating period
between replacements may be reduced/increased accordingly.
To replace the membrane filter element, proceed as follows:
1. Isolate the sampling system from the gas supply in accordance with the System
Shutdown Procedure.
2. Unscrew and remove the filter head from the body of the filter (F2).
3. Remove and discard the o-ring and membrane.
4. Refit a new membrane and o-ring
5. Replace the filter head back into the body of the filter until it reaches the
mechanical stop. – Do Not Use a Spanner/Wrench!
6. Resume normal system operation in accordance with the System Start-Up
Procedure.
5.2

Glycol Absorption Cartridge Replacement

Used on Natural Gas systems only!
Life expectancy of the absorption cartridge is dependent upon operating conditions in
each specific application. As a minimum, it is recommended that the glycol absorption
cartridge be changed every 1 month. If inspection of the removed cartridge shows that
it is in poor/good condition after 1 months operation then the operating period between
replacements may be reduced/increased accordingly.
To replace the glycol absorption cartridge, proceed as follows:
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Installation, Operation & Maintenance Manual and User Guide
(Michell Part No. PTS-MFE).
www.michell.com
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