4
5 INSTALLATION
Installation should only be undertaken by
qualified, experienced personnel who are
familiar with equipment of this type. They
should have read and understood all of the
instructions in this manual. The user should
refer to relevant technical data sheets or
product proposal to obtain dimensional
information for the specific size and model
liquid level gage.
All liquid level gage installations should be
provided with gagecock sets equipped with a
ball check shut-off. Gagecock sets are designed
to isolate the gages from the pressure vessel
when it becomes necessary to drain or service
the gages. The ball check shut-off is designed
to retard leakage of the contained fluid in the
event of gage glass breakage. Ball checks are
available for both positive and negative vessel
pressures.
The number of different types of gage and
gagecock installations is too great to detail
adequately in an installation manual. Therefore,
it is the user's responsibility to ensure that
knowledgeable installation personnel plan and
carry out the installation in a safe manner.
The following procedures are some of the
installation guidelines that should be employed:
4 INSPECTION
On receipt of a liquid level gage, check all
components carefully for damage incurred in
shipping. If damage is evident or suspected,
do not attempt installation. Notify the carrier
immediately and request a damage inspection.
Standard Penberthy 1 section TLC gage
consists of: (1) chamber, (2) gaskets, (2)
borosilicate flat glass, (2) rubber bands, (2)
cushions, (2) covers, (1) washer, (1) nameplate
and (8-14) bolting sets, depending on the size.
4.1 Glass inspection
The self stick caution tape was applied at the
factory to protect the glass during shipping,
handling and installation. Do not remove
the tape from the glass until all installation
procedures have been completed, except
during receiving inspection to inspect glass
momentarily for shipping damage. Glass that
is not protected will be vulnerable to dust, grit,
tools and any other objects which may scratch,
chip or break the glass.
WARNING
DO NOT use glass that is chipped or even slightly
scratched. Glass surface defects weaken the
glass, which may result in glass breakage and
fluid loss under pressure resulting in serious
personal injury or property damage.
4.2 User rating inspection
The user should confirm that:
1. The Series LC liquid level gage model
and assembly number stamped on the
nameplate conform to the description on
the user's purchase order.
2. The operating conditions described in
the purchase order agree with the actual
operating conditions at the installation site.
3. The actual operating conditions at the
installation site are within the application
data shown on the relevant technical data
sheet or product proposal referred to
previously.
4. The materials of construction of the
liquid level gage are compatible with both
the contained media and surrounding
atmosphere in the specific application.
SAFETY INSTRUCTIONS
If the size, model or performance data of the
liquid level gage as received does not conform
with any of the criteria above, do not proceed with
installation. Contact an authorized Penberthy
distributor for assistance. The incorrect gage can
result in unacceptable performance and potential
damage to the gage.
PENBERTHY
SERIES LC FLAT GLASS GAGES
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
5.1 Piping strain
The gage should be mounted and connected
so that is does not support any piping weight.
Piping not supported properly, independent of
the gage, may subject the gage to stresses that
can cause leaks or glass breakage. Support
brackets are available as an accessory.
5.2 Differential thermal expansion
High mechanical loads may be imposed on a
gage by expanding and contracting pipes due
to hot or cold service. Such mechanical loads
on the gage must be minimized by the use of
expansion loops in the system. Failure to allow
for expansion or contraction can result in leaks
or glass breakage.
5.3 Mirror viewing
For added safety, a system of indirect viewing
by means of mirrors should be installed to
protect personnel from the hazards of possible
gage failure.
