CLAY&BAILEY MODEL 1700, Operation & Maintenance Manual, Page: 2 / 7

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Mild operating conditions
– Vented vapors of internal fluids and outside air that does not
cause a residue to form, or excessive corrosion on working parts of the manway and/or
vapor or gas moving through the manway is constant and no surge shock is
encountered.
Extreme operating condition
– Internal vapors, particulate or liquid under operating
conditions that will cause product buildup or corrosion of manway. Pressure or vacuum
surges and shock occurring on areolar basis during operation.
Operating Conditions Number of Inspections/Month
Normal 1
Extreme 2 -4*
*Depending on the rate of buildup or severity of the conditions.
GENERAL INSPECTION PROCEDURE
CAUTION: Pressure or vacuum conditions in the tank must be relieved and
must be in a non-operating state before releasing cams, removing hood or
entering the tank through manhole.
DOME
1. Inspect the rain hood dome (16) for holes and damage where moisture may
enter. Replace immediately the dome if damage.
2. Check the dome for excessive dents and distortion that may restrict the flow into
and out of the pressure/vacuum manway.
3. Clean out any product buildup and/or debris around the dome and between the
dome and the manway.
4. Remove the dome from the support rods (17) by removing the nuts (18) on top of
the dome and inspect the rods for straightness and corrosion. Replace any that