PENBERTHY SERIES LC FLAT GLASS GAGES
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
Before installation these instructions must be read fully and understood
TABLE OF CONTENTS
Product warranty ................................................ 1
1. About the manual .......................................... 2
2. Introduction ................................................... 2
2.1 System description ................................. 2
3. Available models ........................................... 3
3.1 Design ratings at maximum and
minimum operating temperatures ....... 3
4. Inspection ...................................................... 4
4.1 Glass inspection ..................................... 4
4.2 User rating inspection............................ 4
5. Installation ..................................................4-5
5.1 Piping strain ............................................ 4
5.2 Differential thermal expansion.............. 4
5.3 Mirror viewing ......................................... 4
5.4 Nut retorquing ........................................ 5
5.5 Belleville washers (optional) ................. 5
6. Operation ....................................................5-6
6.1 Hydrostatic test ...................................... 6
7. Maintenance ...............................................6-7
7.1 Maintenance procedures ....................... 6
7.2 Troubleshooting ..................................... 7
8. Removal - disassembly - reassembly ......7-9
8.1 Disassembly ........................................... 7
8.2 Inspection of glass seating surfaces .... 8
8.3 Reassembly ............................................ 8
9. Disposal at end of useful life ........................ 9
10. Telephone assistance ................................... 9
11. Exploded parts diagrams ............................ 10
Tables and figures
Table 1 Design ratings of RLC gage ............... 3
Table 2 Design ratings of TLC gage ............... 3
Table 3 Bolt torque values .............................. 5
Figure 1 Nut tightening sequence ................... 5
Figure 2 Belleville washer position.................. 5
Figure 3 Gage disassembly .............................. 7
Figure 4 Nut loosening sequence .................... 7
Figure 5 Gage reassembly ............................... 8
Figure 6 Exploded parts diagram of
reflex gage ........................................ 10
Figure 7 Exploded parts diagram of
transparent gage .............................. 10
Product warranty
Emerson warrants its Penberthy products
as designed and manufactured to be free
of defects in the material and workmanship
for a period of one year after the date of
installation or eighteen months after the date
of manufacture, whichever is earliest. Emerson
will, at its option, replace or repair any products
which fail during the warranty period due to
defective material or workmanship.
Prior to submitting any claim for warranty
service, the owner must submit proof of
purchase to Emerson and obtain written
authorization to return the product. Thereafter,
the product shall be returned to Emerson with
freight paid.
This warranty shall not apply if the product has
been disassembled, tampered with, repaired or
otherwise altered outside of Emerson's factory,
or if it has been subject to misuse, neglect or
accident.
The responsibility of Emerson hereunder is
limited to repairing or replacing the product
at its expense. Emerson shall not be liable
for loss, damage or expenses related directly
or indirectly to the installation or use of
its products, or from any other cause or
for consequential damages. It is expressly
understood that Emerson is not responsible
for damage or injury caused to other products,
buildings, personnel or property, by reason of
the installation or use of its products.
This is Emerson’s sole warranty and in lieu of
all other warranties, expressed or implied which
are hereby excluded, including in particular all
warranties of merchantability or fitness for a
particular purpose.
This document and the warranty contained
herein may not be modified and no other
warranty, expressed or implied, shall be made
by or on behalf of Emerson unless made in
writing and signed by the company's general
manager or director of engineering.
valves.emerson.com © 2017 Emerson. All rights reserved. VCIOM-04074-EN 17/05
PENBERTHY SERIES LC FLAT GLASS GAGES
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
1 ABOUT THE MANUAL
This manual has been prepared as an aid and
guide for personnel involved in installation or
maintenance. All instructions must be read and
understood thoroughly before attempting any
installation, operation or maintenance.
SAFETY INSTRUCTIONS
Emerson does not have any control over the
manner in which its liquid level gage is handled,
installed or used and Emerson cannot and does
not warrant or guarantee that a liquid level gage
is suitable for or compatible with the user's
specific application.
WARNING
Contained fluids may be pressurized and can exit
vessel connections unexpectedly due to apparatus
or material failure. Safety glasses should be worn
when installing a liquid level gage. Failure to
follow instructions could result inserious physical
injury or property damage.
2 INTRODUCTION
Penberthy liquid level gages are used to allow
direct visualization of liquid level in vessels.
By peering through the glass, it is possible to
monitor color, clarity and level of a gas/liquid
interface. Gages are available in varying lengths
and configurations (end connect, side connect,
multiple sections, NPT or flange connections,
etc.). Visual indication can be enhanced by
using reflex glass or illuminators (accessory).
2.1 System description
Penberthy Series LC gages comprise six
basic components. Each component may vary
slightly, depending on the desired physical and
mechanical properties for the gage. Use the
exploded parts views in Section 11 as additional
reference material.
Chamber: provides a pressure-retaining
metallic channel for the liquid to enter and be
viewed. Slot(s) are machined into the chamber
to provide direct visualization of the process
fluid.
Gaskets: seal the gap and prevent leakage
between the chamber and the glass. Gaskets
are available in a variety of materials for
compatibility with the media in the gage.
Glass: allows for visual observation of the
process fluid in the chamber.
Cushion: acts as a protective buffer between
the glass and the cover. For proper sealing,
cushions must be as hard or harder than the
gasket material.
Cover: protects the glass assembly from
external hits and provides a flat, rigid surface
that is used to compress the gage assembly
evenly. The large chamber gage cover
resembles a football. It has significantly more
metal along the center of the sides to provide
more strength and resistance to high pressure
stresses.
Bolting: compresses the components between
the covers (transparent gages) or cover and
chamber (reflex gages).
Shield: (optional on transparent gages) used
to prevent the process media from contacting
the glass.
2
PENBERTHY SERIES LC FLAT GLASS GAGES
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
3 AVAILABLE MODELS
Penberthy large chamber (Series LC) liquid level gages are designed for applications other than
steam/water. Penberthy SeriesLC liquid level gages are designed for service where the liquid
being gaged tends to boil or surge making reading difficult. The large liquid chamber tends to
minimize the effects of boiling and surging, thereby increasing the accuracy of the liquid level
readings.
3.1 Design ratings at maximum and minimum operating temperatures
TABLE 1
Gasket
material
®
(standard) or non-asbestos 4-9 2400 psig (16550 kPa) at -20°F (-29°C) to 100°F (38°C) 1840 psig (12690 kPa) at 600°F (316°C)
Grafoil
Top-chem 2000
25% glass filled PTFE 4-9 650 psig ( 4480 kPa) at -20°F (-29°C) to 100°F (38°C) 150 psig ( 1030 kPa) at 500°F (260°C)
NBR (Buna-N) 4-9 300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C) 225 psig ( 1550 kPa) at 250°F (121°C)
FKM (Viton
PTFE (Teflon®) 4-9 300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C) 150 psig ( 1030 kPa) at 500°F (260°C)
®
®
) 4-9 300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C) 180 psig ( 1240 kPa) at 400°F (204°C)
TABLE 2
Gasket
material
®
(standard) or non-asbestos 4-9 1580 psig (10890 kPa) at -20°F (-29°C) to 100°F (38°C) 1220 psig (8410 kPa) at 600°F (316°C)
Grafoil
Top-chem 2000
25% glass filled PTFE 4-9 650 psig ( 4480 kPa) at -20°F (-29°C) to 100°F (38°C) 150 psig ( 1030 kPa) at 500°F (260°C)
NBR (Buna-N) 4-9 300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C) 225 psig ( 1550 kPa) at 250°F (121°C)
FKM (Viton
PTFE (Teflon®) 4-9 300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C) 150 psig ( 1030 kPa) at 500°F (260°C)
PCTFE/(Kel-F®) shields 0.063"
(1.6 mm) thick
®
®
) 4-9 300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C) 180 psig ( 1240 kPa) at 400°F (204°C)
Glass
size
4-9 2400 psig (16550 kPa) at -20°F (-29°C) to 100°F (38°C) 100 psig ( 690 kPa) at 500°F (260°C)
Glass
size
4-9 1580 psig (10890 kPa) at -20°F (-29°C) to 100°F (38°C) 100 psig ( 690 kPa) at 500°F (260°C)
4-9 300 psig ( 2070 kPa) at -20°F (-29°C) to 100°F (38°C) 180 psig ( 1240 kPa) at 400°F (204°C)
Wetted parts material steel or stainless steel w/B7 bolting
Wetted parts material steel or stainless steel w/B7 bolting
Model RLC reflex
Model TLC transparent
Note: lower temperatures are possible with metallic material variation. (e.g., 316 stainless
construction, Grafoil
®
gaskets/cushions useable to –325°F (-198°C)).
The pressure and temperature ratings may deviate from the previous tables if the gasketing
materials of construction and/or bolting are other than those specified. Higher and/or lower
temperature ratings are available with different materials of construction.
To determine the maximum allowable working pressure for a specific temperature within the
design limits stated in the tables, the user should refer to applicable technical data sheets or,
when provided, the specifically stated design limits on a product proposal.
Note: under no circumstances should shields be used in reflex style gages. Installation of shields
in reflex style gages will keep the liquid from coming in contact with the refractive prisms, thereby
prohibiting visualization of the liquid level in the gage.
DANGER
NEVER exceed these design ratings or application data. Exceeding design ratings or application data
may result in mechanical failure of gage components resulting in death, serious personal injury and
property damage.
NOTES
Grafoil® is a registered trademark of Graftech.
Top Chem 2000® is a registered trademark of Klinger.
PCTFE (formerly known as Kel-F® - a registered trademark of 3M) is manufactured by Daikin.
Viton® and Teflon® are registered trademarks of E.I. duPont de Nemours and Company.
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