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8.7 Purge orifice identification/changeout dMED 45 - 300
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Reference figure page 79 and the Purge Plug Identification Table.
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The lettering (A through S), located on the purge valve body, indicates the orifice size selected to
suit the operating pressure of the dryer per the chart below.
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If the inlet pressure to the dryer will be different than the pre-set orifice size, the purge valve can
be adjusted.
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Most dryers use a single orifice purge valve represented by the Blue and Green single letter
references in the table below.
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Larger dryers may require a two or three hole purge valve as represented by the Red and Yellow
two and three letter references.
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To select the correct orifice size, locate the appropriate dryer model at the left side of the table and
then the operating pressure at the top.
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Make sure that the correct valve body (1, 2 or 3 hole) and orifice disc (01, 02, 03 or 04) has been
supplied with the dryer. The discs have the number (01, 02, 03 or 04) stamped out at the top.
Summary of Contents for dMED 025
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