Troubleshooting - Emerson Bettis PressureGuard Installation And Maintenance Manual

Installation and Maintenance Manual
E-90090005 Rev. A
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Refer to BETTIS™ Pressurematic™ manual (document number 'I-0220', available from the
factory or online at 'www.emerson.com').
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Routine maintenance is required for the operator to function as designed. Refer to the IOM
manual for the specific type of operator in the system per Table 3.
(Operators and IOM Manuals) .
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Troubleshooting

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Any visible leaks from the SCH module should draw troubleshooting focus.
NOTE:
Figure 3. (BETTIS
system supplies the low pressure regulated side. Therefore, any leakage on the low pressure
side will cause significant changes in high pressure gauge values in a short time period.
Depressurize the system before removing/disassembling any components on the manifold.
Vent/return lines will assist in tracing the leakage. This will be done without cycling the unit
but with the pressurized removal of the reservoir and off-panel device.
To accomplish this:
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Maintenance
Drain any accumulated moisture from Fluid Reservoir (24) by opening the
drain plug.
Check, clean and/or replace the Filter Element(s) (4).
Check the Pressure Relief Valves' (10 and 13) setpoints and reset values.
Check the operation and calibration of the control equipment if possible using
the Isolation Test Valve (28) (Pressure Pilot (14) and/or Solenoid (20)).
Top up the hydraulic fluid with compatible fluid.
Operator Maintenance
SCH Module Troubleshooting
PressureGuard™ Schematic) shows that the high pressure side of the
TM
Remove the vent line from the pilot/solenoid vent port. This isolates it from the
SCH module and allows for observation of any oil leakage through the device.
This checks poppet/spool and spool sleeve O-ring seal in operating positions.
Remove the reservoir from module to observe components
(reliefs and reset valve) for oil leakage while under normal operating pressures.
Section 6: Maintenance
March 2014
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