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  1. #1

    WTT supreme schrodinger

    VACUUM GENERATORS VS. VACUUM PUMPS Vacuum generators are compact sources of instantly applied vacuum, but the devices are not inexpensive substitutes for vacuum pumps. In most applications, motor-driven vacuum pumps are more economical. This is because motor-driven vacuum pumps are more energy efficient, producing vacuum directly from electrical power. Generators, on the other hand, have an inherent double loss in energy efficiency: first when electrical energy is used to compress air; and second, when compressed air is then used to generate vacuum.

    There are, however, five types of applications where vacuum generators should be strongly considered.

    Intermittent duty: Generators are ideal sources for instantly applied vacuum that is required intermittently. Generators tap into compressed air lines and produce vacuum only when needed. A vacuum pump, on the other hand, must run continuously to supply vacuum on demand. A solenoid valve in the vacuum line controls when vacuum is used, and vacuum that is produced but not used is opened to the atmosphere and wasted. This offsets the inherent energy efficiency motor-driven vacuum pumps have over vacuum generators.

    A good rule of thumb is that if vacuum is required less than 50% of the time, then vacuum generators are the most economical source of vacuum. If vacuum is required more than half the time, a vacuum pump is the best choice.

    Size considerations: Vacuum generators are much smaller than vacuum pumps. Packaged in compact, lightweight housings, most multistage models weigh less than 1 lb and single-stage units weigh as little as 3 oz. All can be mounted in any position. This allows generators to be used where pumps simply will not fit. It also allows the vacuum source to be located closer to the point of use. Shorter air lines cost less and qucken response.

    Recuding noise: Vacuum generators are quieter than vacuum pumps because they eliminate the mechanical noise of the pumps. When used with exhaust silencers, noise levels are less than 60dB.

    High temperature: Generators operate at temperatures as high as 140[degrees]F and may be the only practical way of generating a vacuum in such hot environments. Vacuum pumps are limited by the motor's thermal protection, which will shut down the pump at a certain temperature.

    Temperatures below freezing, on the other hand, are tough on generators. Moisture in the compressed air can freeze, plugging the generator, and filters cannot remove all moisture from an air supply. For these applications, a motor-driven pump is recommended.

    Hazardous atmospheres: Vacuum generators are also favored in hazardous atmospheres to avoid the possibility of a spark from the electric motor. Where radio-frequency noise generated by motor-driven vacuum pumps may affect electrical/electronic systems, vacuum generators are again a better bet.
    See more: http://vinadanabus.com/vacuum-cleane...t-good-repair/

  2. #2
    Please direct all trade related post to the proper section. There are section for PC NA/EU and PS3 NA/EU
    http://forums.defiance.com/forumdisp...-(Trading-Post)

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