Penberthy Series L Flat glass gages, Penberthy-EN Manuals & Guides

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Page 1

PENBERTHY SERIES L 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 ........................................3-4

3.1 Design ratings at maximum and

minimum operating temperatures ....... 3

4. Inspection ...................................................... 5

4.1 Glass inspection ..................................... 5

4.2 User rating inspection............................ 5

5. Installation ..................................................5-6

5.1 Piping strain ............................................ 5

5.2 Differential thermal expansion.............. 5

5.3 Mirror viewing ......................................... 5

5.4 Nut retorquing ........................................ 6

5.5 Belleville washers .................................. 6

6. Operation ....................................................6-7

6.1 Hydrostatic test ...................................... 7

7. Maintenance ...............................................7-8

7.1 Maintenance procedures ....................... 7

7.2 Troubleshooting ..................................... 8

8. Removal - disassembly - reassembly ....8-10

8.1 Disassembly ........................................... 8

8.2 Inspection of glass seating surfaces .... 9

8.3 Reassembly ............................................ 9

9. Disposal at end of useful life ...................... 10

10. Telephone assistance ................................. 10

11. Exploded parts diagrams ............................ 11

Tables and figures

Table 1 Design ratings of RL gage ................. 3

Table 2 Design ratings of TL gage .................. 4

Table 3 Bolt torque values .............................. 6

Figure 1 Nut tightening sequence ................... 6

Figure 2 Belleville washer position.................. 6

Figure 3 Nut loosening sequence .................... 8

Figure 4 Exploded parts diagram of

transparent gage .............................. 11

Figure 5 Exploded parts diagram of

reflex gage ........................................ 11

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.

VCIOM-04071-EN 17/05

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PENBERTHY SERIES L 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. Emerson cannot and will not 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 inserious 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 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 view 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 as 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. 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.

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PENBERTHY SERIES L FLAT GLASS GAGES

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

3 AVAILABLE MODELS

Penberthy low pressure (Series L) liquid level gages are designed for applications other than steam/water where the physical and mechanical properties of a ductile iron cover are sufficient to meet the pressure and temperature needs of the application.

3.1 Design ratings at maximum and minimum operating temperatures

TABLE 1

Model RL reflex Gasket material

(standard) or

Grafoil non-asbestos

Top-Chem 2000

25% glass filled PTFE 1-9 650 psig (4480 kPa) at -20°F (-29°C) to 100°F(38°C)

NBR (Buna-N) 1-9 300 psig (2070 kPa) at -20°F (-29°C) to 100°F(38°C)

FKM (Viton

PTFE (Teflon

) 1-9 300 psig (2070 kPa) at -20°F (-29°C) to 100°F(38°C)

Glass

size

1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

Wetted parts material steel or stainless steel w/B7 bolting

-20°F (-29°C) to 100°F (38°C) 600°F (316°C)

2400 psig (16550 kPa) 2335 psig (16100 kPa) 2250 psig (15510 kPa) 2175 psig (15000 kPa) 2100 psig (14480 kPa) 2025 psig (13960 kPa) 1950 psig (13440 kPa) 1875 psig (12930 kPa) 1800 psig (12410 kPa) 2400 psig (16550 kPa) 2335 psig (16100 kPa) 2250 psig (15510 kPa) 2175 psig (15000 kPa) 2100 psig (14480 kPa) 2025 psig (13960 kPa) 1950 psig (13440 kPa) 1875 psig (12930 kPa) 1800 psig (12410 kPa)

150 psig (1030 kPa) at 500°F (260°C)

225 psig (1550 kPa) at 250°F (121°C)

180 psig (1240 kPa) at 400°F (204°C)

150 psig (1030 kPa) at 500°F (260°C)

1780 psig (12220 kPa) 1720 psig (11860 kPa) 1670 psig (11510 kPa) 1600 psig (11030 kPa) 1550 psig (10690 kPa) 1500 psig (10340 kPa)

1440 psig (9930 kPa) 1390 psig (9580 kPa) 1340 psig (9240 kPa)

100 psig (690 kPa) at 500°F (260°C)

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PENBERTHY SERIES L FLAT GLASS GAGES

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

TABLE 2

Model TL transparent Gasket material

(standard) or

Grafoil non-asbestos

Top-Chem 2000

25% glass filled PTFE 1-9 650 psig (4480 kPa) at -20°F (-29°C) to 100°F(38°C)

NBR (Buna-N) 1-9 300 psig (2070 kPa) at -20°F (-29°C) to 100°F(38°C)

FKM (Viton

PTFE (Teflon

PCTFE/(Kel-F

0.063" (1.6 mm) thick

) 1-9 300 psig (2070 kPa) at -20°F (-29°C) to 100°F(38°C)

) shields

Glass

size

1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

1-9 300 psig (2070 kPa) at -20°F (-29°C) to 100°F(38°C)

Wetted parts material steel or stainless steel w/B7 bolting

-20°F (-29°C) to 100°F (38°C) 600°F (316°C)

2000 psig (13790 kPa) 1815 psig (12510 kPa) 1630 psig (11240 kPa)

1440 psig ( 9930 kPa) 1250 psig ( 8620 kPa) 1065 psig ( 7340 kPa)

875 psig ( 6030 kPa) 690 psig ( 4760 kPa)

500 psig ( 3450 kPa) 2000 psig (13790 kPa) 1815 psig (12510 kPa) 1630 psig (11240 kPa)

1440 psig ( 9930 kPa) 1250 psig ( 8620 kPa) 1065 psig ( 7340 kPa)

875 psig ( 6030 kPa)

690 psig ( 4760 kPa)

500 psig ( 3450 kPa)

150 psig (1030 kPa) at 500°F (260°C)

225 psig (1550 kPa) at 250°F (121°C)

180 psig (1240 kPa) at 400°F (204°C)

150 psig (1030 kPa) at 500°F (260°C)

180 psig (1240 kPa) at 400°F (204°C)

1480 psig (10200 kPa)

1340 psig (9240 kPa) 1210 psig (8340 kPa) 1060 psig (7310 kPa)

920 psig ( 6340 kPa) 790 psig ( 5450 kPa) 645 psig ( 4450 kPa) 510 psig ( 3520 kPa) 370 psig ( 2550 kPa)

100 psig (690 kPa) at 500°F (260°C)

The pressure and temperature ratings may deviate from Table 1-2 if the gasketing materials of construction and/or bolting are other than those specified. 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.

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PENBERTHY SERIES L FLAT GLASS GAGES

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

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. Penberthy standard 1 section TL gage consists of: (1) chamber, (2) gaskets, (2) borosilicate flat glass, (2) rubber bands, (2) cushions, (2) covers, (1) washer, (1) nameplate and (6-14) 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 and property damage.

4.2 User rating inspection

The user should confirm that:

1. The Series L 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.

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 assure 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:

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.

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PENBERTHY SERIES L FLAT GLASS GAGES

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

5.4 Nut retorquing

Nut retorque is vital to the operation of a liquid level gage because gaskets take permanent 'set' under initial bolt loading at assembly. Tightening of nuts before installation to values specified in Table 3 is necessary to insure pressure retaining capabilities of liquid level gage to specific design ratings. The user must refer to the liquid level gage model and assembly number and to the purchase order or tag to determine materials of construction.

SAFETY INSTRUCTIONS

Before placing a liquid level gage into initial operation, torque values must be verified. From factory testing to installation, gasketing may take 'set' reducing closure force. Retorquing before operation reduces chance of leakage or gasket 'blow out'.

Using a torque wrench, tighten nuts in 5 ft·lb (7 Nm) increments following the 'Z' pattern sequence in Figure 1, until the torque values shown in Table 3 for the specific liquid level gage are reached. For multiple section gages, torque the center section(s) and work progressively toward the ends of the gage. If bolting, gasketing or glass on any repaired section of a multi-section gage is disturbed, all sections must be checked for integrity and retorqued as necessary.

WARNING

Failure to comply with the proper torquing sequence or force value can lead to leakage, gasket blow-out or glass breakage resulting in gage failure, serious personal injury or property damage.

Note: depending on gage size there may be less bolting than shown in Figure 1. Start at the center and follow 'Z' pattern outward to the limit of bolting on a specific gage.

5.5 Belleville washers

Belleville washers are used to reduce the need to retorque nuts. This is especially important for gages subject to pressure and/or thermal cycling. The conical washers allow for material expansion and contraction while maintaining axial bolt loading and, therefore, compression on the gasket. Model RL gages require 3 washers per nut, model TL gages require 2 washers per nut (4 per bolt). Washers should be assembled with the cupped side facing the gage cover. Refer to Figure 2 for proper washer assembly. Note: the following procedure is to be done on only one side of a transparent gage. Using a torque wrench, tighten nuts in 5 ft·lb (7 Nm) increments following the 'Z' pattern sequence in Figure 1 until the torque values shown in Table 3 are reached.

6 OPERATION

Before initializing liquid level gage operation, check that all installation procedures have been completed. Use only qualified, experienced personnel who are familiar with liquid level gage equipment and understand the implications of the tables and all the instructions thoroughly. Check to determine that all connections are pressure tight. Ensure that nuts have been retorqued to their proper values as specified in Table 3. Remove self stick caution tape from the glass and inspect to be sure that glass is clean and free of any damage such as cracks, scratches, pits and chips.

FIGURE 1 Nut tightening sequence

FIGURE 2 Belleville washer position

Belleville washer

Cover

TABLE 3 - BOLT TORQUE VALUES

Gage models and gasket material ft·lb Nm

RL, LT w/Grafoil® (standard) 20 to 25 27 to 34 RL, LT w/non-asbestos (optional) 25 to 30 34 to 41 Top-chem 2000 25% glass filled PTFE 19 to 22 26 to 30 PTFE and PCTFE (Kel-F® ) 20 to 25 27 to 34 All models with FKM or elastomeric (optional) 10 to 15 14 to 20 TL with PCTFE (Kel-F®) shields (optional) 0.063" (1.6 mm) 20 to 25 27 to 34

20 to 25 27 to 34

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PENBERTHY SERIES L FLAT GLASS GAGES

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

6.1 Hydrostatic test

DANGER

Liquid level gage installations should be brought into service slowly to avoid excessive shock or stress on the glass. Rapid pressurization or sudden changes in temperature may cause glass breakage. To avoid excessive thermal shock or mechanical stress on glass, the connecting gagecocks should be opened slightly, and the gage temperature and pressure allowed to slowly equalize. If the gagecocks are equipped with ball checks, the gagecocks must be opened all the way after the pressure and temperature have equalized to permit operation of the automatic ball checks in the event of failure. Failure to follow the recommended operating procedures can result in death, severe personal injury and/or property damage.

Take all precautions necessary to handle the possibility of leakage during the test. Hydrostatically pressure test all installations to at least 100 psig (690 kPa) but less than the design pressure and correct any leakage before proceeding.

7 MAINTENANCE

WARNING

Use only qualified, experienced personnel who are familiar with liquid level gage equipment and understand the implications of the tables and all the instructions thoroughly. DO NOT proceed with any maintenance unless the liquid level gage has been relieved of all pressure or vacuum, has been allowed to reach ambient temperature and has been drained or purged of all fluids. Failure to follow instructions can cause serious personal injury and property damage.

The rate at which components degrade is dependent upon a variety of conditions. Pressure, temperature and process media all influence the rate at which gage components deteriorate. Higher temperatures can accelerate the deterioration of gaskets, cushions, glass and metals. Acids and similar chemicals can break down the integrity of almost any material. Concentration of chemicals can accelerate the corrosion rate. Emerson cannot create a blanket maintenance schedule for every application. The end user is the most familiar with the process media and conditions and must be responsible for creating a maintenance schedule. The user must create maintenance schedules, safety manuals and inspection details for each liquid level gage.

Realisticmaintenance schedules can only be determined with full knowledge of the services and application situations involved. These will be based on the user's own operating experience with their specific application. If bolting, gasketing or glass on any section of a multi-section gage is disturbed, all sections must be checked for integrity and retorqued or repaired as necessary. On all installations, the following items should be evaluated regularly by the user for purposes of maintenance:

1. Glass, for cleanliness and signs of damage or wear.

2. Shields, if used, for signs of clouding, wear or deterioration.

3. Gage, for signs of leakage around gaskets or at connections.

4. Gage, for signs of internal or external corrosion.

7.1 Maintenance procedures

Glass should be given regular and careful

attention. Keep glass clean using a commercial glass cleaner and a soft cloth. Inspect the surface of the glass for any clouding, etching or scratching or physical damage such as bruises, checks or corrosion. Glass that is damaged is weakened and may break under pressure. Shining a light at approximately a 45° angle will aid in detecting some of these conditions. Typically, damaged areas will glisten more brightly than the surrounding glass because the light is reflected. Detection of any damage, problem areas or surface wear is sufficient evidence to take the liquid level gage out of service. DO NOT proceed with operation of the liquid level gage until the glass has been replaced with a glass replacement kit following the disassembly reassembly instructions in Section 8. Shields showing any signs of clouding, wear or deterioration are an indication that the gage glass has been exposed, or could soon be exposed to the contained fluid. Take liquid level gage out of service immediately. DO NOT proceed with operation of the liquid level gage until shields and glass have been replaced by following the disassembly-reassembly instructions in Section 8. Gasket leaks must be repaired immediately. DO NOT proceed with operation of a liquid level gage until gaskets have been replaced by following Section 8 disassembly-reassembly instructions. Connection leaks at a flanged or threaded connection should be corrected by tightening the bolting at the connection or by taking the liquid level gage out of service and wrapping the connection threads with PTFE tape on all male pipe threads.

Corrosion may occur if the user has selected an improper material for the liquid level gage application. It is the responsibility of the user to choose a material of construction compatible with both the contained fluid and the surrounding environment. If internal or external corrosion is present, an investigation must be performed immediately by the user. It may be necessary to contact an authorized Penberthy distributor to better determine the origin of the corrosion.

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PENBERTHY SERIES L FLAT GLASS GAGES

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

7.2 Troubleshooting

Problem: Glass becomes etched or clouded

prematurely in service.

Cause: Fluid being handled is not

compatible with the glass or shields.

Solution: Replace the glass and install

shields which will not be affected by contained fluid.

Problem: Glass breaks continually in

service despite careful attention tomaintenance procedures.

Cause: Thermal shock, hydraulic shock,

mechanical loads, exceeding design ratings or a combination of these.

Solution: Check entire system to determine

possible sources of loads. Check application to determine actual operating conditions and contact an authorized Penberthy distributor on how to proceed.

8 REMOVAL - DISASSEMBLY - REASSEMBLY

WARNING

8.1 Disassembly

Secure a workbench longer than the liquid level gage, and sufficiently wide to lay out parts as they are removed.

1. Lay gage on bench so nut side of fastener is up.

2. Hold gage firmly; loosen nuts starting at both ends of each section and then proceed from both ends to the center of each section as shown in Figure 3.

3. Nut loosening sequence

- Remove nuts, washer, belleville washers

(if any) and nameplate.

- Tap covers with rubber hammer as

needed to loosen and remove.

- For belleville washer assemblies: to

remove covers, studs may need to be removed by laying the assembly on its side and knocking the stud/U-bolts through the cover with a hammer and punch.

- Remove cushions, glass, shields (if any)

and gaskets.

- Tap liquid chamber or remaining covers as

necessary with rubber hammer to break loose and remove remaining components.

- Remove, destroy and dispose of all glass,

cushions, gaskets and shields. Under no circumstances should these components be re-used or installed on a gage.

Note: if size of gage is smaller than shown,

follow spiraling sequence from the ends until all bolting is loosened.

WARNING

Once used, cushions and gaskets are deformed permanently by compression and, if re-used, may cause leaks and high stress points resulting in glass breakage. Glass may contain hidden damage and internal stresses caused by previous usage. If re-used, the glass may break under pressure causing severe personal injury or property damage.

FIGURE 3 Nut loosening sequence

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PENBERTHY SERIES L FLAT GLASS GAGES

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

8.2 Inspection of glass seating surfaces

Clean the glass seating surfaces on the liquid chamber and cover with a soft metal scraper (preferably brass) to remove all burrs, rust and remnants of the previous gaskets and cushions. Exercise extreme care to avoid gouging or scarring gasket and cushion seating surfaces. Use a known flat piece of metal the same approximate length as the glass or a new piece of glass and a thickness gage to check flatness of each glass seating surface on liquid chamber and under cover. Surface must be flat within 0.002 inch (0.05 mm). If any one surface is found to be beyond a tolerance of 0.002 inch (0.05 mm), the entire gage must be disposed of and replaced. Gasket seating surface must have a final surface finish of 63 to 250 AARH.

WARNING

Flatness of glass seating surfaces outside

0.002 inch (0.05 mm) tolerance specified is an indication of the gage having been overstressed through repeated exposure to mechanical, thermal or hydraulic shock during its previous service. Operation of a liquid level gage which has been overstressed will result in abnormal stresses on the glass which may cause glass to break. If surface finish is not in the 62-250 AARH range, gasket may extrude under pressure with resulting sudden release of pressure, leakage of contained fluid, serious personal injury or property damage.

Glass seating surfaces should NOT be machined to achieve seating tolerance. The chamber and cover are designed for a critical thickness to achieve the pressure/temperature ratings. Machining glass seating surfaces may result in non-compliance to the necessary critical thickness due to material removal.

8.3 Reassembly

If all glass seating surfaces are found to be within the 0.002 inch (0.05 mm) tolerance described in the previous section, proceed to obtain new glass, gaskets, cushions and shields (if used) and proceed to reassemble as follows (refer to exploded parts view in Section 11 ifneeded):

1. Clean threads on bolt and nuts to remove all paint, rust and scale. Apply a light coat of oil to the threads.

2. For transparent gages, insert bolts through half the cover and lay out covers along the bench, side by side, with the liquid chamber. Use chamber to space covers and line them up with vision slots.

3. For reflex style and belleville reflex style gages, lay out covers along bench, side by side, with liquid chamber. Use chamber to space covers and line them up with vision slots.

4. For transparent belleville style gages, thread nuts on stud, place two belleville washers under nut with pointed end toward the nut (see Figure 2), insert stud through each cover and lay out covers along bench, side by side, with liquid chamber. Use chamber to space covers and line them upwith vision slots.

5. Install one cushion inside each cover.

WARNING

Separate installation instructions are supplied with replacement glass. All instructions supplied with the glass must be followed, as there are precautions to be taken when handling gage glass. Among the precautions is avoidance of bumping or sliding glass against any surface and inspection of individual pieces. Failure to follow any of the replacement gage glass installation instructions could result in glass breakage with resulting sudden release of pressure, severe personal injury or property damage.

6. Install rubber band around each piece of glass, then place glass centered inside each cover.

7. Install shields, if used, and gasket on glass being careful to keep components centered.

8. Place liquid chamber on the gaskets making sure all components are aligned with vision slot.

9. For reflex gage, install U-bolts in place by tapping as needed with rubber hammer, being careful not to lose alignment with vision slot.

10. For reflex gage, quickly turn over assembly onto backside of U-bolts. Assemble nameplate, washer and nuts to U-bolts. Tighten nuts with fingers. Using a torque wrench, tighten nuts in 5 ft·lb (7 Nm) increments, following the sequence in Figure 1 until the torque values shown in Table 3 are reached.

Note: depending on gage size there may be

less bolting than shown in Figure 1. Start at the center and follow 'Z' pattern outward to the limit of bolting on a specific gage.

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PENBERTHY SERIES L FLAT GLASS GAGES

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

11. For transparent gage, install gaskets and shields, if used, centered on vision slots.

12. Install rubber band around each piece of glass, then place glass centered on gasket or shields, if used.

13 Install one cushion on each piece of glass.

14. Install covers in place being careful to maintain components alignment inside.

15. Install nameplate, washer and nuts to bolts. Tighten nuts with fingers. Using a torque wrench, tighten nuts in 5 ft·lb (7Nm) increments, following the sequence in Figure 1 until the torque values shown in Table 3 are reached.

15A. For transparent belleville style gages:

install nameplate and two belleville washers under each nut with pointed end toward the nut (see Figure 2). Finger tighten nuts.

Note: the following procedure is to be

done on only one side of the gage.

15B. For reflex belleville style gages: install

nameplate and three belleville washers under each nut with pointed end toward the nut (see Figure 2). Finger tighten nuts.

16. Using a torque wrench, tighten nuts in 5ft·lb (7 Nm) increments, following the sequence in Figure 1, until the torque values shown in Table 3 are reached.

Refer to Section 5 for installation and Section6 for operation of liquid level gage when returning to service.

9 DISPOSAL AT END OF USEFUL LIFE

Penberthy gages 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 gage 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 applicable technical data sheets for materials of construction.

10 TELEPHONE ASSISTANCE

If you are having difficulty with your liquid level gage, 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 your liquid level gage ∙ Invoice # and date ∙ Process conditions (pressure, flow rates,

tankshape, 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 liquid level gage 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.

Page 11

PENBERTHY SERIES L FLAT GLASS GAGES

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

11 EXPLODED PARTS DIAGRAMS

FIGURE 4 Transparent

FIGURE 5 Reflex

PARTS LIST

Item Description

1 Cover 2 Chamber 4 Nut 48 Glass 7 Gasket 8 Cushion 9 Shield 100 Bolt/U-bolt 125 Washer 163 Nameplate 331 Band

RECOMMENDED SPARE PARTS

Item Description Qty.

100 Bolt/U-bolt 2/1 per sect. 4 Nut 2 per sect. 48 Glass 1 7 Gasket 2 8 Cushion 2 9 Shield (if used) 2

NOTE

Size 9 shown - actual gage may be shorter and require fewer bolting components.