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    TUBE PROCESSING QUICK REFERENCE CHART

    FOR AVERAGE SIZE UNITS

    (15mm, ~8 feet long)

    BOMBARDING

    GLASS TEMPERATURE PRESSURE CURRENT
    UP TO 150C 2 4 mm 200 mA
    150 - 200C 2 4 mm 300 mA
    200 - 250C 2 4 mm 400 mA
    250 - 300C 1 1/2 2 mm

            800 mA or maximum allowed for
         electrodes used (10-15 x rating)


    PUMPING

    GLASS COOL DOWN VACUUM OBTAINED
    TEMPERATURE IN MICRONS
    GOOD        BETTER
    200C - - -            < 10
    175C <  10          <   5
    150C <    5          <   1
    75C <    1          < 0.1

    RECOMMENDED FILLING PRESSURES
    (AT 70-80C GLASS TEMPERATURE)

                 TUBE DIAMETER PRESSURE (Torr/mm Hg.)      
    8 mm

    ...........................

    17 mm
    9 mm ........................... 15 mm
    10 mm ........................... 13 mm
    11 mm ........................... 12 mm
    12 mm ........................... 11 mm
    13 mm ........................... 10 mm
    15 mm ........................... 9 mm
    18 mm ........................... 8 mm
    20 mm ........................... 7.5 mm
    22 mm ........................... 7 mm
    25 mm ...........................

    6 mm

     HP, 4 mm LP

     

     

     

    Proudly Made in the USA

     

    Copyright 2006
    Silica Vacuum Products