THERMOJET
®
G-3700E SERIES
OIL PURIFIER SYSTEM
INSTALLATION AND OPERATING MANUAL
Doc #
77740151
Rev
03
Date
June 2020
Page
44
of
111
Monitoring Normal Operation
The daily operation of the ThermoJet system for the process operator has been reduced to
monitoring and daily checks of the ThermoJet oil Purifier to emergency procedures in the event of
a major malfunction. Except for emergencies, routine adjustment of the unit is not required. .
Any change in the Inlet Pump Discharge pressure, Filter Discharge pressure or the System
Discharge pressure from the initial set points is an indication that some operational variable has
changed. Care should be taken before making adjustments that might offset the failure symptoms
and lead to more serious problems before detection and corrections can be made.
Keeping system adjustments to a minimum is intended to make the systems more reliable and to
insure proper operation. It is not meant to discourage the natural troubleshooting initiative of the
process technician. Operators should be familiar with the operating instruction of this machine,
knowing how to read gauge values and alarm settings before attempting these procedures.
Dailey ThermoJet Oil Purifier System Operational Checks
The following operating checks should be made daily;
a) The normal inlet Pump Discharge pressure gauge reading is between14.5 and 16.5 BAR
(210 to 240 PSIG) at operating temperature.
b) The normal Filter Discharge pressure gauge reading is between 14.5 and 16.5 BAR (210
to 240 PSIG).
c) The normal System Discharge pressure gauge reading is between 3.5 and 6.9 BAR (50
to 100 PSIG) at operating temperature depending upon size/configuration of the oil return
line.
d) The temperature controller output setting gauge reading is relatively steady within 10
o
F
of the temperature controller set point on electric heated units. The normal process
temperature is between 160
o
-185
o
F.
e) The Nitrogen compound gauge is reading ZERO.
f) Removed gases and water vapor are exhausting to t the flare system.
g) Compare the Pump Discharge and Filter Discharge pressure gauges for the pressure
difference between the two readings. If the pressure drop is approaching 1.7 BAR (25
PSID), the filter element is plugged and must be changed.
Check Pump Discharge pressure
Check Filter Discharge pressure
Check System Discharge pressure
Check Oil Temperature
Check nitrogen
compound gauge
