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Patented in Japan, U.S.A., other
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Bore
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25-40mm
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Total head
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5-25m
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Capacity
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0.01-0.06m3/min
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This degassing pump (degassing equipment), with an interlocked vacuum pump,
extracts and discharges even dissolved gas in liquid with surprising efficiency.
Degasses liquid mechanically without using any chemical additive such as
hydrazine. Therefore it is safe, does not cause contamination, and greatly
reduces maintenance costs.
We also manufacture pumps that meet sanitary specifications.
Principle of degassing (PAT.)
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When pumping liquid flows through the orifice into the intake part of the
pump, the dissolved gas in the liquid is separated from the liquid by decompression,
and the generated gas-liquid mixture is fed to the inducer.
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The liquid in the gas-liquid mixture is pushed against the periphery and
stratified by rotation of the inducer, and the gas accumulates in the central
area of the casing at the same time.
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The gas remaining in the liquid is further separated from the liquid, as
such liquid stratum is broadly exposed to high vacuum.
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The gas is then drawn out by the vacuum pump through the separating impeller.
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Any remaining liquid in the gas drawn out by the vacuum pump is separated
by the separating impeller, and returned to the intake side of the inducer.
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Surprising degassing efficiency!
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The outstanding degassing power is evident by the reduction of dissolved
oxygen from a near 8ppm at the intake side (raw water at 20 degree C) to
0.5ppm or less at the outlet side (ASP-0510, at a flow rate of 25litres/min
or less).
Degassing Pump, Degassing Equipment ASP type
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Continuous degassing/defoaming can be done easily and at low cost even
for food and beverage processing!
YOKOTA degassing/defoaming technology is high-profile new technology that
has been featured in news articles.
For details of the news article, please refer to "Current Topics: Degassing, Defoaming".
Please contact us for more information.
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Inquiries
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Overseas team
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Tel
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+81 82-241-8672
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FLASH PLAYER installed. |
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Applications
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Food industry:
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Deaeration of foods and dairy products in processes such as boiling, immersion,
extraction, mixing, fermentation, and preservation; Production of deaerated
water
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Beverage industry:
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Deaeration of milk, beverages, wine, beer, other, in processes such as
boiling, extraction, mixing, fermentation, and preservation; Production
of deaerated water
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Ice production:
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Supply of deaerated water for production of high-quality clear ice
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Rust prevention:
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Supply of deaerated water (deoxidized water) to prevent water pipes or
boilers from rusting.
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Chemical industry:
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Degassing of gas-containing liquid, foaming liquid, other
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Packaging:
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Degassing of liquid foods, beverages, pharmaceuticals, detergents, cosmetics,
paints, other, before packaging/bottling (improvement of packaging efficiency
by prevention of overflow)
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Ultra-pure water production:
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Cost reduction by reducing size of degasifiers (reduction of load on membranes
and reduction of space)
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Machine industry:
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Deaeration of lubricants, hydraulic oil, cutting oil, other
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Industrial cleaning:
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Deaeration of cleaning liquid (improvement of cleaning efficiency)
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Others:
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Degassing/Deaerating processes in water-quality improvement systems, water
treatment systems, other
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Outstanding performance is also demonstrated in applications such as extraction
from sealed tanks (vacuum tanks), and suction and transfer of liquid containing
large amounts of gas bubbles.
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YOKOTA's proposal: Troubled with stubborn bubbles ? ........ The ASP type
pump is the solution to the problem.
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What if the ASP type pump, originally designed for degassing, is applied
to defoaming ?
As expected, the defoaming tests have proven excellent defoaming performance
as indicated below.
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Defoaming test equipment (ASP-0310 3.7kW-3000min-1 / water ring vacuum pump 3.7kW)
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Test results with various kinds of liquid are shown in Fig.1-Fig.3.
Curves on the left side of each figure show the relation between flow rate
and total head, which vary depending on gas amounts (0%, 50%, 60%, 70%).
A curve on the right side of each figure shows the relation between the
gas amount (%) at the intake side and the gas amount (%) at the outlet
side.
Calculation of defoaming efficiency is as follows:
For example, if the gas amount is 70% at the intake side and 20% at the
outlet side, then,
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Defoaming efficiency = 1 - (Gas amount at outlet side / Gas amount at intake
side) = 71.4%
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Fig.1 Defoaming of normal water
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The graph indicates removal of approx. 95-98% of gas bubbles from normal
water.
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Fig.2 Defoaming of green tea
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The graph indicates removal of approx. 92-95% of gas bubbles from green
tea in a condition ready for consumption (tea powder dissolved at the ratio
of 0.55g powder/80cc water).
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Fig.3 Defoaming of detergent
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The graph indicates removal of approx. 67-72% of gas bubbles from detergent
dissolved in water at 1% density. Despite the propensity of detergent to
produce large quantities of difficult-to-remove bubbles, our degassing
equipment performed well.
The above test results prove our degassing equipment's surprising defoaming
efficiency as well as its capability of continuous processing.
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Moreover, YOKOTA Degassing Equipment enables remarkable cost reduction
in the processing of various foaming liquids.
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No clogging problems like that with membrane type equipment, no troublesome
maintenance required, and the pumps easily meet sanitary specifications.
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Time required to eliminate bubbles has been shortened, making it unnecessary
to install a large tank for stabilization of liquid.
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The stirring operation of the built-in impeller simultaneously provides
favorable results such as liquid homogenization and reduced particle size.
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With the self-priming and pressurized discharge capabilities, all processes
including suction, stirring, defoaming and transfer of liquid are achieved
in this single, compact pump, unlike conventional methods which require
installation of several components.
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Use of YOKOTA Degassing Equipment greatly reduces costs of liquid processing. |
Equipment suitable for defoaming relatively large amounts of liquid is
also available.
For details, please refer to Defoaming Pump, Defoaming Equipment UPSA type
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