| |  | Patented in Japan, U.S.A., other | | Bore | 50-250mm | Total head | 10-60m | Capacity | 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).
UPM type: | Vacuum pump built-in type | UPS type: | Vacuum pump mounted type | UPS type: | Vacuum pump separate type |
Unique features
| Capable of continuous suction and transfer of liquids containing high viscosity sediment materials and air (gas-solid-liquid multiphase flow). |
| 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. |
| Enhanced self-priming type which needs no priming even at initial operation after installation. |
| The intake piping can be constructed in many ways such as with waved pipes or across embankments, and so on. |
| Due to rational construction, the pump is highly reliable, maintenance is easy, and economical automatic operation is possible. |
| 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. |
Principle (PAT.) ............ Try and see its excellent performance.
UPM type | | |  | 4: | Main impeller | 5: | Water-air separating impeller | 6: | Return passage | 14: | Vacuum pump impeller |
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The water-air separating impeller 5 is installed between the volute pump and the vacuum pump. | 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. | 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. | 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
Transferring food materials: | Sauce, Soy sauce, Stock, Ketchup, Unrefined sauce, Liquor, Seaweed, Fluid of other raw materials, other | Transferring chemical liquids: | 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 | Loading and unloading for tankers: | Aniline, Nitrobenzene, Acetic acid, Nitric acid, other (cargo oil pumps for cargo transfer and stripping for tankers, ballast pumps, bilge pumps) | Sludge drainage: | Sludge, Pulp waste water, Muddy water, Human waste, Pulverized coal sludge, Sewage, other | Earth excavation: | Muddy sand, Seawater, Muddy water containing gravel, other (pumps for reverse circulation, non-clogging dredging pumps, sand pumps) | Sealed (Vacuum) tank extraction: | Pure water, Chemical liquid, other | Defoaming air-containing liquid: | Foam latex liquid, Foam starch liquid, Normal paraffin fermenter liquid, Lubricants, hydraulic oil, cutting oil, other | Other: | Hydropower snow transport (For details, please refer to "Current Topics: Snow Removal and Snow Melting".) |
Example applications and installations
| 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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