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| ♦Mechanical
booster pump |
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[Construction]
Two shafts are placed in parallel, to which two balanced cocoon-shaped
rotors are fixed respectively, and they are driven by a motor. As
the rotor is rotated, the gas coming in through the suction port is
trapped in the space between the casing and rotors, and then exhausted
continuously through the exhaust port, producing vacuum in an efficient
manner.
[Selection of second-stage pump]
A mechanical booster pump is not designed to compress and discharge
the gas to the atmospheric pressure. Its performance varies with the
type and performance of the second-stage pump. Therefore, it is essential
to select a second-stage pump most suitable to the required purpose
when to construct an exhaust system that uses a mechanical booster
pump.
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To select a pump, assume the exhaust capacity of the second-stage
pump to be 1/2 to 1/10.
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Select a large-capacity pump for the pressure of the case of
continuous running at relatively high operation pressure and select
a small-capacity pump for the pressure of the case of continuous
running at low operation pressure.
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Utilizing the advantage of performance of oil-sealed rotary
pump and water-ring pump, select an oil-sealed rotary pump for
the second-stage pump for operation at high vacuum, and select
a water-ring pump for exhausting a massive volume of condensable
gas at low vacuum.
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Since various combinations of pumps are possible according to
the specifications, do not hesitate to contact us before making
the final decision.
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| Model : SMB·SMB-C |
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| Model :
SMB-D (DM) series (direct-coupled booster pump made of aluminum) |
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Weight saving has been realized in these pumps due to the aluminum and other light materials used in major parts. |
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Adoption of magnet coupling permits operation start from the atmospheric pressure, reducing the exhaust time by about 50% (DM type). |
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