Cashco 3100 - Manual (Page 2)

2 IOM-3100
CAUTION
DO NOT mix pressure/vacuum weight assemblies. Fail-
ure to ensure that both weight assemblies are installed
in the correct location can change the pressure and
vacuum relief settings. This can cause tank failure.
CAUTION
DO NOT attempt to remove the vent from the tank or
process vessel without fi rst bleeding all pressure from
the system. ALTERNATIVE MEANS OF PRESSURE
RELIEF MUST BE PROVIDED WHEN THE VENT IS OUT
OF SERVICE.
III. INSPECTION AND STORAGE
The pressure/vacuum 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 vent
should be stored with all the protective fl ange covers
CAUTION
DO NOT change pressure ratings by adding addition-
al weights to the pallet assembly without consulting
Cashco Inc. or your VCI representative.
The 3000 Series Vents are designed to mate with a
150 lb ASME fl ange. Torque guidelines are provided
in Table 1. The Vents are NOT rated for full fl ange
pressure and do not require high bolting torque.
Before installing the 3000 Series Vent, remove all
packing materials from inside and outside the vent.
WARNING
The vent must be installed in a vertical position as
shown in Figure 1. The tank nozzle on which the vent
is mounted should have the same nominal diameter as
the venting device. It is recommended that the tank
nozzle fl ange face be within 1 degree of horizontal for
best performance of the venting device.
II. SAFETY WARNINGS
Tank or system protection is the primary function of
the weight loaded Pressure and/or Vacuum Relief
Vent. It must be selected to meet the total pressure
and vacuum fl ow requirements within the Maximum
Allowable Working Pressure and Vacuum of the
system on which it is installed. Consult API Standard
2000 for tank protection sizing procedures. Improperly
specifi ed relief vents may result in structural damage
to the tank or system and can cause severe personal
injury or death. When Pipe-Away relief vents are used, backpressure
in the header system will affect the set point of
weight loaded vents by the amount of the header
pressure. Maximum possible header pressure must
be considered when sizing the pressure relief vent.
SECTION II
SECTION III
in place. Make sure that any loading weights that
might have been shipped separately, to protect the
vent during shipping, are accounted for and stored
with the vent. These weights, when required, will be
installed during installation. See Section IV.
SECTION IV
IV. INSTALLATION
If loading weights were shipped separate from the
vent, make sure to install on the appropriate pallet.
Inspect the gasket seating surface of the tank nozzle
fl ange. It must be clean, free of scratches, corrosion,
tool marks and fl at.
FRP and Aluminum vents are furnished with fl at
faced fl anges. It is recommended that they be
installed on mating fl at face fl anges with a full faced
gasket. If the fl at face of the vent is sealing against
a raised face steel fl ange, a spacer or fi ller ring must
be used to fi ll the annular space of the raised face
steel fl ange.
Make sure the gasket is suitable for the application
and is in good condition.