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Patented in Japan, U.S.A., other
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Bore
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50-250mm
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Total head
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10-60m
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Capacity
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0.1-8m3/min
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The YOKOTA Enhanced Self-Priming Pump is a volute pump with an interlocked
water-air separating impeller and a vacuum pump.
The mixture of water and air gathered in the center of the volute pump
is centrifugally separated by rotation of the water-air separating impeller
and only the air is drawn out by the vacuum pump. Therefore the volute
pump always operates under the highest vacuum condition, and shows stable
and supreme pumping performance without being blocked by the incoming air
or cavitation.
It is probably the only horizontal shaft type volute pump in the world
which is capable of continuous suction and transfer of liquids containing
high viscosity sediment materials and air (i.e., gas-solid-liquid multiphase
flow).
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UPM type:
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Vacuum pump built-in type
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UPS type:
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Vacuum pump mounted type
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UPS type:
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Vacuum pump separate type
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Unique features
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Capable of continuous suction and transfer of liquids containing high viscosity
sediment materials and air (gas-solid-liquid multiphase flow).
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Universal pump which is also capable of continuous suction and transfer
of liquids containing solid, such as food materials, muddy water containing
gravel, and sewage containing empty cans.
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Enhanced self-priming type which needs no priming even at initial operation
after installation.
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The intake piping can be constructed in many ways such as with waved pipes
or across embankments, and so on.
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Due to rational construction, the pump is highly reliable, maintenance
is easy, and economical automatic operation is possible.
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A wide variety of materials are available, including FC, CAC, SCS and YOKOTA's corrosion and wear resistant special stainless steel casting (YST), to meet the needs of various kinds of liquid.
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Principle (PAT.) ............ Try and see its excellent performance.
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UPM type
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4:
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Main impeller
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5:
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Water-air separating impeller
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6:
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Return passage
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14:
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Vacuum pump impeller
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The water-air separating impeller 5 is installed between the volute pump
and the vacuum pump.
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When operation is started, the main impeller 4 races and the vacuum pump
14 operates, eliminating the air in the suction pipe.
When the air is eliminated and a vacuum level close to the suction head
is reached, the pumping liquid flows into the pump casing, and is discharged
by the main impeller 4.
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The mixture of water and air in the center is drawn by the vacuum pump
14, goes behind the main impeller and reaches the water-air separating
impeller 5.
The water-air separating impeller separates the water from the air by centrifugal
force.
The water returns to the suction mouth through the return passage 6, and
only the air gathered in the center is drawn out by the vacuum pump 14.
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Therefore the volute pump always operates under the highest vacuum condition,
and is not blocked by the incoming air at the pump suction mouth or the
main impeller.
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Applications
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Transferring food materials:
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Sauce, Soy sauce, Stock, Ketchup, Unrefined sauce, Liquor, Seaweed, Fluid
of other raw materials, other
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Transferring chemical liquids:
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Phosphate slurry, Formalin, Ammonia, Caustic soda, Light oil, Heavy oil,
Concentrated sulfuric acid, Ketone, Acrylic ester, Volatile liquids such
as ethylene glycol, Gas-containing liquid, Polypropylene powder, Pellets,
other
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Loading and unloading for tankers:
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Aniline, Nitrobenzene, Acetic acid, Nitric acid, other (cargo oil pumps
for cargo transfer and stripping for tankers, ballast pumps, bilge pumps)
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Sludge drainage:
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Sludge, Pulp waste water, Muddy water, Human waste, Pulverized coal sludge,
Sewage, other
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Earth excavation:
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Muddy sand, Seawater, Muddy water containing gravel, other (pumps for reverse
circulation, non-clogging dredging pumps, sand pumps)
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Sealed (Vacuum) tank extraction:
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Pure water, Chemical liquid, other
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Defoaming air-containing liquid:
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Foam latex liquid, Foam starch liquid, Normal paraffin fermenter liquid,
Lubricants, hydraulic oil, cutting oil, other
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Other:
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Hydropower snow transport (For details, please refer to "Current Topics: Snow Removal and Snow Melting".)
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Example applications and installations
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For defoaming
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For chemical tankers
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For reverse circulation
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For sewage
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Defoaming and degassing pumps with intensified water-air separation capability
are also available. For details, please refer to
Defoaming Pump, Defoaming Equipment UPSA type
Degassing Pump, Degassing Equipment ASP type
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