MODEL EDPT-228
ELECTROSTATIC DEHYDRATION AND PRECIPITATION TESTER
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APPLICATION :
Utilized for the determination of water content of emulsions such as encountered in crude oil processing , by means of the application of high electrical potential across the fluid while under controlled temperature conditions and prior to centrifuging.
DESCRIPTION:
This tester is a fourth generation model and incorporates several design
features which extend the capabilites beyond the earlier models. Eight samples can be tested
simultaneously and current values (mill amp) for each test sample can be
individually maintained and
recorded. The maximum voltage has been extended along with the maximum operating
temperature to 325° F ( ° C ) .
Basically, test samples are placed in special 7 in. (18 cm) long,
100 ml centrifuge tubes with special O-ring sealed electrode caps. Tubes are then placed in a temperature
controlled aluminum block and allowed to stabilize. A unique cover assembly captures all
eight electrode caps and automatically makes the electrical connection through
spring loaded contact pins. High
voltage is then applied from a separate
power supply cabinet for a predetermined time period. The application of this high potential
causes the water molecules to align and attract to one another, therefore
forming water droplets which then precipitate out of the emulsion.
Following are the principal features of the subject Tester :
Test Cell Cabinet
1.
Electrically heated aluminum block with eight precision contoured
holes.
2.
Digital Temperature Control Indicator.
3.
Miniature blower and screened vent openings to supply forced cooling and
eliminate fumes.
4.
Bimetallic over-temperature safety switch for aluminum block.
5.
High voltage contact assembly cover plate with independent leads for each
tube. (eight pairs)
6.
Eight assemblies of 100 ml centrifuge tubes with heavy duty thread and
matching electrode cap assemblies.
Circular electrode positioned at 75 ml level and center electrode
positioned at 6 ml level.
7.
Safety switch assures that high voltage can only be applied when contact
plate is in place.
8. Power requirement is 120 Volts, 8 Amp.
Control Cabinet
1.
Control panel has following components :
a) Switches. Circuit Breakers and Pilot Lights.
b) Variable Voltage Control.
c) Voltmeter, 0-4000 Volt.
d) Two Ampmeters; one to
measure total current , and the other to measure individual current of each cell
via selector switch.
e) Interval Timer, 0-30 minutes.
Rotation of timer knob to the desired timing interval energizes primary
of transformer and timing motor. On
release, the motor drives timer to zero and motor and transformer load
de-energize.
f ) Miniature blower to supply forced cooling for cabinet .
CAPABILITY:
Number of Samples 8
Normal Sample Temperatures 100 -160° C
Maximum Operating Potential 4,000 Volt
INSTALLATION NEEDS:
Control Cabinet 120 Volt - 8 Amp. - 50/60 Hz
Transformer Cabinet 120 Volt - 5 Amp. - 50/60 Hz
Test
Cell Cabinet
220 Volt SYSTEM AVAILABLE, Requires separate external step-down transformer.
Requires good and reliable electrical GROUND connections.
SIZE &
WEIGHT:
Control Cabinet , 9" tall x 9.5" deep x 18" wide , 8.5 kg.
Transformer Cabinet , 10.5" tall x 9.5" deep x 18" wide , 19 kg.
Test Cell Cabinet , 10.5" tall x 9.5" deep x 18" wide , 18 kg., shield not measured
Net Wt. 46 Kg
SHIPPING:
One volume
Crated :
Gross Wt. : Est. 75 kg