Cashco 5500 - Manual (Page 2)

 IOM-5500
CAUTION
DO NOT attempt to remove the vent from the tank or
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the system. ALTERNATIVE MEANS OF PRESSURE
RELIEF MUST BE PROVIDED WHEN THE VENT IS OUT
OF SERVICE.
SECTION III
III. SAFETY WARNINGS:
IV. SHIPPING, INSPECTION AND
STORAGE:
The pressure relief vent is carefully packaged to
prevent damage or contamination during shipping.
Inspect the equipment when it is received and
report any damage to the carrier immediately. The
POVV should be stored in a clean environment with
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Tank or system protection is the primary function of
the Pilot Operated Vent Valve (POVV). It must be
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within the maximum allowable working pressure
of the system on which it is installed. Consult API
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structural damage to the tank or system, and can
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In the event of a diaphragm failure, the Model 5500
will vent pressure to the pipeaway connection causing
the pressure relief valve to fail in the OPEN position.
The vent will now function like a weight loaded vent
under this condition with a lower set point. Consult
the factory for any questions related to this over-
pressure condition.
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kept open and unobstructed to ensure that the pilot
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where tank vapors may condense or polymerize in
the sensing tubing or the pilot valve, a nitrogen purge
may be required to prevent internal obstruction of the
tube. Consult the factory for recommendations.
After isolating the relief vent, bleed all pressure
from both main and pilot valve before removing the
Model 5500 POVV.
NOTE: Both the pilot valve and main valve are
exposed to the process vapors. Observe all
plant procedures and Material Safety Data Sheet
recommendations before inspecting, adjusting or
servicing any components.
The vent on the spring bonnet of the pilot must
be clean and unobstructed for proper and safe
operation of the valve.
intrusion of foreign materials. If there are indications
of physical damage or internal contamination, the
valve may need to be disassembled, cleaned and
inspected prior to installation.
Lifting lugs may be provided on the main valve for
lifting and handling. To avoid damage to the lower
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material until it is ready to be installed. DO NOT
store the POVV directly on the ground.
WARNING
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or maintenance, carefully read and understand the
information in this manual. If there are any questions
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contact the factory or an authorized repair center
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CAUTION
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SECTION IV