Vacuum Dehydration systems
Oil vacuum dehydration systems have
several filtration steps for removing particulate and vacuum distillation unit
for dehydration.
FV (Vacuum Dehydration) Compared to Other
Technologies
Centrifuge units removes free water only; has difficulty
breaking stable emulsions; larger envelope dimensions but lower flows; higher
initial and operating costs.
Desiccant units have limited water removal capability
due to absorbing material; only removes air ingressed particles; expensive
compared to the volume of water removed. Does not work well in viscous fluids (>100 cSt.)
Coalescer units removes free water only; has difficulty
breaking stable emulsions; does not work well in viscous fluids (>32 cSt.)
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Water
Removal Techniques
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Water
Type Removed
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Separator
Type
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Dissolved
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Emulsified
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Free
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No
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Some
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Yes
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Gravity
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No
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Some
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Yes
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Centrifuge
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No
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Some
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Yes
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Coalescing
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Some
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Yes
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Yes
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Desiccant
Filtration
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Yes
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Yes
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Yes
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Vacuum
Distillation
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Factors that affect water extraction Rate
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Properties
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Water
Extraction Rate
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Oil
Temperature
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Strongly
Increased
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Operation
Vacuum (Negative Pressure in Vacuum Tower)
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Increased
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Initial
Content of Water
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Increased
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Flow
Rate of FV System
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Increased
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Oil
Properties
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Viscosity
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Reduced
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Surface
Tension, Detergent Additive
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Reduced
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Air
Humidity
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Reduced
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FV Series
FV Series of oil purifiers removes
solid particulate, free and dissolved water, free and dissolved gases/air from
hydraulic and lubricating fluids. These systems consist of vacuum filtration
unit for removing particulate and dehydration unit for removing water and
gases.
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FV
Performance
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Potential
Contaminant
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(NAS
4) ISO 14/13/10
ISO
Cleanliness Code 14/13/10 Attainable
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Solid
Particulate
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<100 ppm
Removes
100% of free water, 80-90% of dissolved water
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Water
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Removes 100% of free air, 80-90% of
dissolved air
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Air
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Removes 100% of free gases, 90% of
dissolved gases
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Gases
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GENERAL
SPECIFICATIONS
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FV
200
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FV
100
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ّFV
50
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FV
20
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FV
10
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Model
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200
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100
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50
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20
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10
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Flow
Rate (Lit/min)
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£4
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Operating
Pressure (bar)
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-0.5
to -0.9
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Operating
Vacuum (bar)
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70
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Max.
Fluid Temperature (ºC)
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3
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2
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1½
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1¼
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1
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Inlet
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Connection
Size (inch)
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2
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1½
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1¼
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1
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¾
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Outlet
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4
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3.5
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3
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2.2
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1.8
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Total
Motors Power (KW)
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50
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40
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25
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18
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10
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Heater
Power (KW)
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6
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4
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2
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1
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1
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#
of Elements
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680
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Max.
Viscosity (cSt)
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30
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15
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7
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3
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1.5
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Water
Removal Rate (lit/hr)*
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>4
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25-40
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10-25
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4-10
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<4
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Max.
Oil Tank Capacity (m³)**
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200
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150
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90
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50
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30
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Min.
Operating Capacity (lit)
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380
V, 3 phase, 50 Hz
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Power
Supply
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* Water Content 5% and Oil Viscosity 32 cSt.
** Continuous water
Ingression
Higher capacity systems are
available upon request.
System could be equipped
with particle counter & water sensor
Principle of Operation
Contaminated oil is drawn into the FV purification
system by a vacuum pump. The oil passes through a prefilter (40micron), then a
heater (oil heat to an optimum temperature).
Then oil enters to a packed tower for increasing the
exposed surface area of the oil and converting the water to the vapor form.
Water free oil falls to the bottom of distillation tower
and is removed by an oil pump. This pump forces the dry oil through a fine
filter (3 micron).
Clean oil passes out the unit and back to the reservoir.
The vapors are drawn through a condenser by the vacuum
pump.
Condensate water is drained from the system.