PENBERTHY REFRACTIVE PROTECTOR / GLASS UNION
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 - refractive protector. .............. 2
2.1 System description ............................... 2
3. Available models ........................................... 2
4. Inspection ...................................................... 2
5. Installation ..................................................... 3
6. Operation ....................................................... 3
6.1 Pre-operational check .......................... 3
6.2 Operation ............................................... 3
7. Maintenance .................................................. 3
7.1 Preventative maintenance .................... 3
7.2 Maintenance procedures ..................... 3
7.3 Disassembly - reassembly ................... 3
8. Introduction - glass union ............................ 3
9. Available models ........................................... 4
9.1 Pressure/temperature ratings
for a single piece of tubular glass ....... 4
9.2 Pressure and temperature ratings
for various glass packing ..................... 4
10. Inspection ...................................................... 5
11. Installation ..................................................... 5
12. Operation ....................................................... 5
13. Maintenance ...............................................5-6
13.1 Preventative maintenance .................... 6
13.2 Disassembly - reassembly ................... 6
14. Disposal at end of useful life ........................ 6
15. Telephone assistance ................................... 6
16. Exploded parts diagram ................................ 7
Tables and figures
Table 1 Pressure/temperature ratings for
a single piece of tubular glass .......... 4
Table 2 Pressure and temperature
ratings for various glass packing ...... 4
Figure 1 Exploded parts diagram .................... 7
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 the Emerson
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-04081-EN 17/05
PENBERTHY REFRACTIVE PROTECTOR / GLASS UNION
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 it’s refractive protector or glass
union are handled, installed or used. Emerson
cannot and will not guarantee that the refractive
protector or glass union is suitable for or
compatible with the user’s specific application.
WARNING
Failure to follow any instruction could possibly
result in a failure of the refractive protector
or glass union to operate as designed causing
physical injury or property damage.
2 INTRODUCTION - REFRACTIVE PROTECTOR
The Penberthy refractive protector is designed
to mount easily to tubular glass gage
assemblies. It protects the gage glass against
damage from outside sources and minimizes
injury or damage to property should the tubular
glass be broken.
2.1 System description
The Penberthy refractive protector is two pieces
of extruded aluminum bolted together to form
a channel. The interior has a white finish with
45° angle red stripes painted on the back wall.
As the tubular glass gage fills, liquid passes
in front of the stripes. The refractive nature of
this liquid fill changes the stripe angle, thereby
indicating the level of the vessel.
If water is the liquid used, the stripes become
horizontal. Liquids with a refractive index less
than water will alter the angle less. Liquids with
a refractive index greater than water will alter
the angle more.
The refractive protector should only be used in
conjunction with high pressure glass. Use with
other types of tubular glass will interfere with
the enhanced level indication characteristics.
3 AVAILABLE MODELS
Penberthy refractive protectors are available
with either a clear polymeric or glass cover.
The length of the protector is based on the
center to center dimensions of the vessel
connections.
4 INSPECTION
On receipt of your refractive protector, 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.
A typical Penberthy refractive protector
consists of (2) aluminum extrusions which
form the body, (1) cover, (2) U-bolts, (4) nuts,
(2)brackets and bolts and nuts for connecting
the extrusions. The quantity of bolts and
nuts will be determined by the length of the
protector.
Glass packing protector nuts are also required
when the refractive protector is used in
conjunction with any standard gagecock
except K3 gagecocks. They are not needed
when utilizing hydraulic adapters. The glass
packing protector nuts are not included with
the protector.
The user should confirm that:
A. The length of the protector and cover
material delivered match the size and model
described on the purchase order.
B. The operating conditions originally
described match the actual conditions at
theinstallation site.
C. The materials of construction for the
refractive protector delivered are
compatible with the conditions at the
installation site.
SAFETY INSTRUCTIONS
If the size, model or performance data of the
refractive protector as received does not conform
to any of the criteria above, do not proceed with
installation. Contact an authorized Penberthy
distributor for assistance. The incorrect protector
may result in unacceptable performance and
potential damage to the tubular glass.
2
PENBERTHY REFRACTIVE PROTECTOR / GLASS UNION
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
5 INSTALLATION
Installation should only be undertaken by
qualified personnel who are familiar with
this equipment. They should have read and
understood all of the instructions in this
manual. Check the exploded view to verify the
proper orientation of the protector and its parts.
Prior to installing the refractive protector,
insure that, if necessary, the glass packing
protector nuts have replaced the standard
glass packing nuts.
1. Hold one of the aluminum extrusions up to
the gagecock assembly so the front of the
protector is facing away from the vessel.
2. Insert the glass or plastic cover into the
slot. (If a glass union is being used, mark
the union position and drill the necessary
holes prior to completing the protector
installation).
3. Hold the second aluminum extrusion up to
the gagecock so the cover fits into its slot.
4. Check to see the holes in the back angle of
each half line up. Insert the corresponding
bolts. Thread and tighten the nuts.
5. Place the top and bottom bracket on the
protector.
6. Install the U-bolts around the protector
nuts and through the holes in the bracket.
Thread and tighten the nuts finger tight.
7 MAINTENANCE
WARNING
Maintenance should only be undertaken by
qualified, experienced personnel who are
familiar with this equipment and have read and
understood all the instructions in this manual. Do
not proceed with any maintenance on a refractive
protector with the tubular glass gage still at
operating pressure or temperature. Relieve the
unit of pressure or vacuum, allow it to reach
ambient temperature and purge or drain it of all
fluids. Failure to do so may result in personal
injury or property damage.
7.1 Preventative maintenance
The user must create maintenance schedules,
safety manuals and inspection details for each
specific gage and gagecock installation. These
will be based upon the users own operating
experience with their specific application.
Realistic maintenance schedules can only be
determined with full knowledge of the services
and application situation involved.
7.2 Maintenance procedures
Clean glass/polymeric cover with a commercial
glass cleaner and a soft, grit free cloth. DO NOT
use a wire brush, metal scraper or any other
device which might scratch the glass/polymer.
6 OPERATION
6.1 Pre-operational check
Before startup, the operator should ensure
that:
A. All installation procedures have been
completed.
B. The refractive protector provides the proper
protection over the entire length of the
tubular glass in the gage assembly.
6.2 Operation
Follow the operating procedures outlined
in your gagecock installation/operation/
maintenance manual. It is very important that
the gage be brought into service slowly to
avoid excessive shock on the tubular glass and
potential glass breakage.
WARNING
Failure to follow the recommended operating
procedures for tubular glass gages can result in
the rapid pressurization of the gage assembly.
This can cause glass breakage and a sudden loss
of pressure resulting in serious personal injury
and property damage.
7.3 Disassembly - reassembly
To disassemble the unit, reverse the
procedure detailed previously in Section 5.
When preparing to reassemble the unit, repeat
the steps in Section 5.
8 INTRODUCTION - GLASS UNION
The Penberthy glass union is designed to join
two pieces of tubular glass. This allows you to
increase the length of your gage, yet maintain
the pressure/temperature rating of the
individual pieces of glass. Glass unions should
be used in conjunction with the refractive
protector to provide mechanical stability.
WARNING
Glass unions must be secured mechanically to a
base for proper operation. The external support
can be in the form of a refractive protector or
some other type of bracket. Lack of longitudinal
stabilization can result in the sight glass escaping
from the glass union and the sudden loss of
pressure and fluid resulting in serious personal
injury and property damage.
3
PENBERTHY REFRACTIVE PROTECTOR / GLASS UNION
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
9 AVAILABLE MODELS
Glass unions can be used with either ⅝” (16 mm) or ¾” (19 mm) tubular glass. They are available
in your choice of steel, brass or stainless steel construction.
9.1 Pressure/temperature ratings for a single piece of tubular glass
TABLE 1
Both ⅝" (16 mm) and ¾" (19 mm) OD
Center to center distance
forvesselconnections
High pressure Heavy wall Red line High pressure Heavy wall Red line
Inch (mm) psig (kPaG) psig (kPaG) psig (kPaG) psig (kPaG) psig (kPaG) psig (kPaG)
10 (254) 410 (2830) 600 (4140) 340 (2340) 310 (2140) 345 (2380) 275 (1900)
15 (381) 385 (2650) 600 (4140) 310 (2140) 280 (1930) 325 (2240) 265 (1830)
20 (508) 355 (2450) 600 (4140) 285 (1970) 265 (1830) 315 (2170) 260 (1790)
25 (635) 300 (2070) 580 (4000) 260 (1790) 250 (1720) 300 (2070) 250 (1720)
30 (762) 275 (1900) 550 (3790) 230 (1590)
35 ( 889) 240 (1650) 500 (3450) 200 (1380)
40 (1016) 210 (1450) 420 (2900) 180 (1240)
45 (1143) 200 (1380) 360 (2480) 170 (1170)
50 (1270) 180 (1240) 340 (2340) 160 (1100)
55 (1397) 150 (1030) N/A 140 ( 970)
60 (1524) 140 (970) N/A 120 ( 830)
65 (1651) 125 (860) N/A 100 ( 690)
70 (1778) 100 (690) N/A 90 ( 620)
N/A - Not available
No corrosion up to 150°F (66°C) Steam boiler service up to 425°F (218°C)
Not recommended
Using secured glass unions and multiple pieces of tubular glass will increase the pressure/
temperature rating over that of an equivalent length of single glass.
9.2 Pressure and temperature ratings for various glass packing
TABLE 2 - PRESSURE/TEMPERATURE DESIGN RATINGS
Body material Glass packing ⅝" (16 mm) OD ¾" (19 mm) OD
Carbon steel
ASTM A105
Bronze ASTM
B150 C64200
316/316L STS
ASTM A276
NOTES
Grafoil® is a registered trademark of Graftech, Inc.
Neoprene®, Viton® and Teflon® are registered trademarks of E.I. du Pont de Nemours and Company.
Grafoil
®
500 psig (3450 kPaG) at -20°F ( -29°C) to +500°F (260°C) 500 psig (3450 kPaG) at -20°F ( -29°C) to +500°F (260°C)
PTFE (Teflon®) 500 psig (3450 kPaG) at -20°F ( -29°C) to +500°F (260°C) 500 psig (3450 kPaG) at -20°F ( -29°C) to +500°F (260°C)
Neoprene® (standard) 500 psig (3450 kPaG) at -20°F ( -29°C) to +300°F (149°C) 500 psig (3450 kPaG) at -20°F ( -29°C) to +300°F (149°C)
FKM (Viton®) 500 psig (3450 kPaG) at -20°F ( -29°C) to +400°F (204°C) 500 psig (3450 kPaG) at -20°F ( -29°C) to +400°F (204°C)
®
Grafoil
PTFE (Teflon
®
Neoprene
FKM (Viton
®
Grafoil
®
) 200 psig (1380 kPaG) at -325°F (-198°C) to +100°F ( 38°C)
(standard) 200 psig (1380 kPaG) at -65°F (-54°C) to +100°F ( 38°C)
®
) 200 psig (1380 kPaG) at -20°F (-29°C) to +100°F ( 38°C)
200 psig (1380 kPaG) at -325°F (-198°C) to +100°F ( 38°C)
125 psig ( 860 kPaG) at +400°F (204°C)
400 psig (2760 kPaG) at -325°F (-198°C) to +100°F ( 38°C)
250 psig (1720 kPaG) at +400°F (204°C)
400 psig (2760 kPaG) at -325°F (-198°C) to +100°F ( 38°C)
125 psig ( 860 kPaG) at +400°F (204°C)
250 psig (1720 kPaG) at +400°F (204°C)
400 psig (2760 kPaG) at -65°F ( -54°C) to +100°F ( 38°C)
165 psig (1140 kPaG) at +300°F (149°C)
335 psig (2310 kPaG) at +300°F (149°C)
400 psig (2760 kPaG) at -20°F ( -29°C) to +100°F ( 38°C)
125 psig ( 860 kPaG) at +400°F (204°C)
250 psig (1720 kPaG) at +400°F (204°C)
500 psig (3450 kPaG) at -325°F (-198°C) to + 500°F (260°C) 500 psig (3450 kPaG) at -325°F (-198°C) to + 500°F (260°C)
PTFE (Teflon®) 500 psig (3450 kPaG) at -325°F (-198°C) to + 500°F (260°C) 500 psig (3450 kPaG) at -325°F (-198°C) to + 500°F (260°C)
Neoprene® (standard) 500 psig (3450 kPaG) at -65°F (-54°C) to +300°F (149°C) 500 psig (3450 kPaG) at -65°F ( -54°C) to +300°F (149°C)
FKM (Viton®) 500 psig (3450 kPaG) at -20°F (-29°C) to +400°F (204°C) 500 psig (3450 kPaG) at -20°F ( -29°C) to +400°F (204°C)
4
PENBERTHY REFRACTIVE PROTECTOR / GLASS UNION
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
10 INSPECTION
On receipt of the glass union, 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.
A Penberthy glass union consists of the union
itself and (2) #8 - 32 screws used to secure
the union.
The user should confirm that:
A. The material of construction and glass tube
OD for which the unit is designed match the
size and model described on the purchase
order.
B The operating conditions originally
described match the actual conditions at
the installation site.
C. The materials of construction for the glass
union delivered are compatible with the
conditions at the installation site.
SAFETY INSTRUCTIONS
If the size, model or performance data of the glass
union as received does not conform to any of the
criteria above, do not proceed with installation.
Contact an authorized Penberthy distributor for
assistance. The incorrect union can result in
unacceptable performance and potential damage
to the tubular glass gage.
11 INSTALLATION
Installation should only be undertaken by
qualified personnel who are familiar with
this equipment. They should have read and
understood all of the instructions in this
manual. Check the exploded view to ensure
the glass union is not inverted.
1. Loosen and remove the glass packing nut,
glass packing gland and glass packing from
both ends of the union.
2. Mount them on the sight glass prior to
inserting the glass into the union. See
Figure 1 for the proper sequence. The glass
packing should be flush with the end of the
sight glass when finished.
3. Insert the upper sight glass into the union
until you have achieved a positive stop.
Tighten the packing nut.
4. Insert the lower sight glass into the union
until you have achieved a positive stop.
Tighten the packing nut.
5. Follow the instructions in your gagecock
IOM for installing the sight glass in the
gagecocks.
6. Mark the position of the collar located in the
center of the union body on the refractor
protector or bracket to which you intend to
secure the union to.
7. Use the template supplied to locate and
3
drill the two
/
16” (5 mm) holes required. If
a refractive protector is being used, the
holes should be drilled in the back of the
protector.
8. Once the refractive protector or bracket
is installed, secure the glass union using
the pre-tapped holes and #8 - 32 screws
provided.
12 OPERATION
After ensuring that all installation procedures
have been completed, follow the operating
procedures outlined in your gagecock
installation, operation and maintenance
manual. It is very important that the gage be
brought into service slowly to avoid excessive
shock on the tubular glass and potential glass
breakage.
WARNING
Failure to follow the recommended operating
procedures for tubular glass gages can result in
the rapid pressurization of the gage assembly.
This can cause glass breakage and a sudden loss
of pressure resulting in serious personal injury
and property damage.
13 MAINTENANCE
Maintenance should only be undertaken by
qualified, experienced personnel who are
familiar with this equipment and have read and
understood all the instructions in this manual.
WARNING
Do not proceed with any maintenance on a glass
union with the tubular glass gage still at operating
pressure or temperature. Relieve the unit of
pressure or vacuum, allow it to reach ambient
temperature and purge or drain it of all fluids.
Failure to do so could result in personal injury
or property damage.
5
PENBERTHY REFRACTIVE PROTECTOR / GLASS UNION
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
13.1 Preventative maintenance
The user must create maintenance schedules,
safety manuals and inspection details for
each specific gagecock installation. These
will be based on the users own operating
experience with their specific application.
Realistic maintenance schedules can only be
determined with full knowledge of the services
and application situation involved.
13.2 Disassembly - reassembly
To disassemble the unit, reverse the procedure
detailed in Section 11.
When preparing to reassemble the union,
replace the glass packing nut, glass packing
gland and glass packing on both the upper
and lower connections.
Repeat the steps in Section 11.
14 DISPOSAL AT END OF USEFUL LIFE
Penberthy refractive protector/glass unions
are used in a variety of fluid applications. By
following the appropriate federal and industry
regulations, the user must determine the
extent of preparation and treatment the
refractive protector/glass union must incur
before its disposal. A Material Safety Data
Sheet (MSDS) may be required before disposal
services accept certain components.
Metal, glass and polymers should be recycled
whenever possible. Refer to order and the
relevant technical data sheet for materials
ofconstruction.
15 TELEPHONE ASSISTANCE
If you are having difficulty with your refractive
protector/glass union, contact your local
Penberthy distributor. You may also contact the
factory direct at (956) 430-2500 and ask for an
applications engineer. So that we may assist
you more effectively, please have as much of
the following information available as possible
when you call:
∙ Model #
∙ Name of the company from whom you
purchased the refractive protector/glass
union
∙ Invoice # and date
∙ Process conditions (pressure, flow rates,
tankshape, etc)
∙ A brief description of the problem
∙ Trouble shooting procedures that failed
If attempts to solve your problem fail, you may
request to return your refractive protector/
glass union to the factory for intensive testing.
You must obtain a Return Authorization (R.A.)
number from Emerson before returning
anything. Failure to do so will result in the unit
being returned to you without being tested,
freight collect. To obtain an R.A. number, the
following information (in addition to that above)
is needed:
∙ Reason for return
∙ Person to contact at your company
∙ 'Ship-to' address
There is a minimum charge for evaluation
of non-warranty units. You will be contacted
before any repairs are initiated should the cost
exceed the minimum charge. If you return a
unit under warranty, but it is not defective, the
minimum charge will apply.
6
PENBERTHY REFRACTIVE PROTECTOR / GLASS UNION
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
16 EXPLODED PARTS DIAGRAM – REFRACTIVE PROTECTOR AND GLASS UNION
FIGURE 1
PARTS LIST - GLASS UNION
Item Description
11 Body
34 Packing, glass
35 Retainer, glass packing
36 Gland, glass packing
37 Nut, glass packing
PARTS LIST - REFRACTIVE GLASS
PROTECTOR
Item Description
4 Nut
4A Nut
48 Glass or polymer
73 Bracket
100 Screw
100A Screw
125 Washer (lock)
137 Bolt
293 Extrusion
RECOMMENDED SPARE PARTS
Item Description Qty.
34 Packing, glass 2
35 Retainer, glass packing 2
37 Nut, glass packing 1
7
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