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PLT Mag-gage, Installation, Operation And Maintenance Manual

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PLT Mag-gage Installation, Operation And Maintenance Manual Download Page 5

 

 

 

         

Process Level Technology, Ltd.

 

                          MAG-GAGE

®

 

 

OPS-001 Revision 6

 

      

Page 

5

 of 

30

 

        

December 17, 2018 

 

 

4.3.0.

 

Electric Switches – MGS700EX(/2) MGS-900EX(/2) 

4.3.1.

 

Introduction

 

4.3.2.

 

Specification

 

4.3.3.

 

Mounting

 

4.3.4.

 

Operation

 

4.3.5.

 

Electrical Wiring-Rising Level

 

4.3.6.

 

Electrical Wiring-Falling Level

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of Contents for Mag-gage

Page 1: ...s Level Technology Ltd MAG GAGE IOM INSTALLATION OPERATION AND MAINTENANCE MANUAL 888 CLEAR CREEK AVE LEAGUE CITY TEXAS 77573 Phone 281 332 MAG1 6241 Fax 281 332 0232 WWW MAG GAGE COM PLT MAG GAGE Revision 06 ...

Page 2: ... 1 7 Hydrostatic Testing 2 2 0 Level Indication 2 2 1 Introduction 2 2 2 Single Indication SI 2 2 3 Single Indication Reference Guide 2 2 4 Flag Flipper Indication FL 2 2 5 Flag Flipper Indication Reference Guide 2 2 6 Flag Flipper Indication Retrofit 2 3 0 Installation 2 3 1 Inspection 2 3 2 Chamber Orientation 2 3 3 Connection Valves 2 3 4 Float Orientation 2 3 5 Chamber Gaskets 2 3 6 Flanges an...

Page 3: ...duction 2 6 2 Procedures 2 7 0 Troubleshooting 2 7 1 Introduction 2 7 2 Float Indicator Detachment 2 7 3 Differential Level 2 7 4 Defective Indicator 2 7 5 Switch Malfunctioning 2 8 0 Parts List 2 8 1 Introduction 2 8 2 Chamber 2 8 3 Indicator Scale Assembly 2 9 0 Warranty 2 9 1 Introduction 2 9 2 Conditions 2 9 3 Provisions 2 10 0 Terms and Condition of Sale 2 10 1 Introduction 2 10 2 Terms 2 10 ...

Page 4: ...allation Procedures 3 1 4 Operation Maintenance 3 2 0 Pneumatic Level Controller LCP 3 2 1 Introduction 3 3 2 Operation Section 4 0 0 Electronic Level Control 4 1 0 Electric Switches MGS200EX 2 4 1 1 Introduction 4 1 2 Specifications 4 1 3 Mounting 4 1 4 Operation 4 1 5 Electrical Wiring Rising Level 4 1 6 Electrical Wiring Falling Level 4 2 0 Electric Switches MGS500EX 2 4 2 1 Introduction 4 2 2 ...

Page 5: ...OPS 001 Revision 6 Page 5 of 30 December 17 2018 4 3 0 Electric Switches MGS700EX 2 MGS 900EX 2 4 3 1 Introduction 4 3 2 Specification 4 3 3 Mounting 4 3 4 Operation 4 3 5 Electrical Wiring Rising Level 4 3 6 Electrical Wiring Falling Level ...

Page 6: ...ailable to suit any vessel or piping requirements Refer to the drawing depicting magnetic level gage mounting configurations 2 1 2 COMPONENTS The gage chamber contains a magnetic float and is completely isolated from the indicator housing attached to the outside of the gage chamber External indicators consist of a single yellow or continuous flag flipper models The magnetic float maintains a magne...

Page 7: ...y with different process conditions Float magnets are located in the upper portion of the float 2 1 6 GAGE RATINGS Magnetic level gages can be designed for operating conditions from full vacuum service up to 5000 PSIG 1100 degrees F and a minimum gravities of 0 20 All magnetic gages with alloy chambers will have full ANSI ratings based on flange classifications Gages with CPVC Kynar PVDF or Fiberg...

Page 8: ...sitioned at the bottom of the channel to cushion the impact of the follower against the cover Although the yellow follower provides maximum visibility even at nighttime retrofit kits for illuminating gages are available 2 2 3 SINGLE TRACKER INDICATION REFERENCE GUIDE A black reference guide in the center of the yellow follower allows the operator to match the graduated scale with the level of the ...

Page 9: ... are recommended where surging or turbulent level conditions exist Each flag indicator is 1 40 inches wide and is more visible than the standard single indicator These are available with or without scales up to 20 ft 2 2 5 WIDE FLAG FLIPPER INDICATION REFERENCE GUIDE Yellow represents liquid column Black represents vapor space 2 2 6 WIDE FLAG FLIPPER INDICATION RETROFIT When flipper style indicato...

Page 10: ...y be magnetically uncoupled from the level indicator during operations 2 3 3 CONNECTION VALVES Valves should be installed between the process vessel and level gage to allow for isolation draining and cleaning purposes See section 2 6 2 on Maintenance for more details on cleaning and maintenance procedures Standard block valves can be ordered with the gage or separately from Process Level Technolog...

Page 11: ...s are available DO NOT WELD ON MAG GAGE OR ON THE VESSEL WITH INDICATOR AND FLOAT INSTALLED THIS WILL DESTROY THE MAGETIC CIRCUIT 2 3 7 INTERFACE APPLICATIONS Magnetic level gages can be used to identify fluid interfaces only if the proper specific gravities have been identified at the maximum operating conditions The float can designed to float in one media while sinking in the other Immiscible o...

Page 12: ...ated Check to see that all drain and vent plugs are in place Close all vent and drain valves if plugs are not used 3 For standard gages install the float by removing the bottom drain flange located at the base of the gage The float is marked TOP to insure proper orientation A spring is attached to the inside of the drain flange to cushion the float when the vessel is empty Reinstall the bottom dra...

Page 13: ...er the gage slowly This procedure is critically important for high pressure and temperature applications The float and indicator may react or rise to condensate accumulation migrating through the top valve with the bottom valve closed 9 When the gage chamber has attained normal operating conditions open the BOTTOM process valve connection slowly This will allow proper fluid entry into the gage cha...

Page 14: ...olate the gage from the process conditions 3 Attach proper vapor collection equipment to the gage vent connection if required 4 Open the vent valve slowly to relieve gage pressure and allow ambient air influx 5 Attach the proper liquid collection equipment to the drain connection is required 6 Open the drain valve slowly to remove remaining gage liquid 7 CAUTION Never use the vent or drain on a ga...

Page 15: ...uently depending on the process system 2 6 2 PROCEDURES 1 Block in the gage chamber with the process connection valves or wait until the vessel is empty and out of service 2 Close the bottom valve first and the top valve second 3 Open the vent valve slowly or remove vent plug carefully to depressurize the gage especially if the gage has been under pressure 4 Open the drain valve slowly or remove t...

Page 16: ...ance Instructions Section 2 6 0 Maintenance 2 6 2 PROCEDURES cont 8 Check the stainless steel pipe clamps to insure they are tight and adjust the scale channel Correctly match the zero point to process connection elevations 9 If necessary use a permanent magnet to attract the yellow indicator until it is coupled to the float inside the chamber ...

Page 17: ...single yellow indicator will magnetically couple but the actual process level will be higher that what the indicator records All floats are clearly marked TOP Floats designed for inverted gages will have a loop welded at the top of the float for installation and removal purposes 4 If the float springs mounted in the top and bottom of the gage chamber have been removed the float could rise past the...

Page 18: ...at require removal Remove the two red seal strips and slide the glass plate cover out of the channel Clean any debris or fragments Replace the glass cover with the new glass plate by sliding into the channel again Replace each red side and top gaskets with the top and bottom covers If the gage is inexcess of 6 feet in length it may be easier to remove the indicator from the channel 2 7 5 SWITCH MA...

Page 19: ...dered 3 Model number of the parts to be ordered if known 4 Original purchase order if known 9 2 8 2 CHAMBER 1 Vent plug 2 Float chamber 3 Chamber blind flange spring and gasket 4 Drain plug 5 Internal magnetic float 2 8 3 INDICATOR SCALE ASSEMBLY 1 Channel assembly 2 Anodized Alum Indicator track with single tracker follower or wide flag indication 3 Stainless Steel Indicator track with single tra...

Page 20: ...not the result of either alterations misuse abuse improper or inadequate adjustments applications or servicing of the product PLT s warranty does not include onsite repairs or services Field service rates can be supplied upon request If the product is believed to be defective the original purchaser shall notify PLT and request a Return Material Authorization Form before returning the material to P...

Page 21: ...llection responsibility for new accounts at their discretion Late charges will be added at the rate of 1 50 per month 2 10 3 SHIPMENT All shipments will be F O B factory location Houston Texas via motorfreight insured Freight charges are normally prepaid and added to invoice unless specified otherwise 2 10 4 RESTOCKING Every magnetic level gage is designed and manufactured to exact customer specif...

Page 22: ...ions before beginning installation 3 1 2 OPERATING SPECIFICATIONS Medium Filtered Air or Gas Supply Pressure VAC to 200 PSIG Max Temp 200 degrees F 93C Air Flow 29 SCFM 100 PSIG Air Consumption Zero SCFM 3 1 3 INSTALLATION 1 Loosen the included hose clamps completely and install them so they surround the gage chamber Reattach the clamp to itself make 2 or 3 turns of the clamp s screw but do not re...

Page 23: ...ected to the connection labeled PORT 3 2 PORT 1 is the supply port that will activate the output when the float passes above the switch Port 2 is the vent It is to be used as a HIGH LEVEL indicator 3 PORT 2 activates the output when the float passes below the switch Port 1 is the vent IT is to be used as a LOW LEVEL indicator 4 All input and output connections are 1 4 inch NPT connections 5 The mu...

Page 24: ... float rises past the high pneumatic switch level it will supply air to the port P4 of the controller 2 When port P4 has air supplied to it there will be a pneumatic signal out of port 2 of the controller The pneumatic signal will continue until the float passes the low pneumatic switch 3 The low switch will supply a signal to port P2 on the controller therefore shutting the pneumatic signal off T...

Page 25: ...lts 250 VDC Maximum Temperature standard 350 degrees F Maximum Temperature HT option 800 degrees F Ambient Temperature Range 25C to 85C Dead Band 0 35 inch Electrical Area Classification Class I Div I Grp B C D 4 1 3 MOUNTING The MGS 200EX EX2 is mounted to the MAG GAGE chamber with all 316 Stainless Steel worm gear pipe clamps Rod mounted switch assemblies are available as a factory installed opt...

Page 26: ...er tightly closed when in operation To prevent ignition of GRP B atmospheres a approved sealing fitting must be installed 4 1 5 ELECTRICAL WIRING RISING LEVEL N O Red Terminal 1 Closes on rising level C Green Terminal N N C Blue Terminal 2 Opens on rising level 4 1 6 ELECTRICAL WIRING FALLING LEVEL N C Red Terminal 1 Opens on falling level C Green Terminal N N O Blue Terminal 2 Closes on falling l...

Page 27: ...rature standard 350 degrees F Maximum Temperature HT option 650 degrees F Ambient Temperature Range 25C to 85C Dead Band 0 35 inch Electrical Area Classification Class I Div I Grp B C D 4 2 3 MOUNTING The MGS 500EX EX2 is mounted to the MAG GAGE chamber with all 316 Stainless Steel worm gear pipe clamps Rod mounted switch assemblies are available as a factory installed option Switch points can be ...

Page 28: ...er tightly closed when in operation To prevent ignition of GRP B atmospheres a approved sealing fitting must be installed 4 2 5 ELECTRICAL WIRING RISING LEVEL N O Red Terminal 1 Closes on rising level C Green Terminal N N C Blue Terminal 2 Opens on rising level 4 2 6 ELECTRICAL WIRING FALLING LEVEL N C Red Terminal 1 Opens on falling level C Green Terminal N N O Blue Terminal 2 Closes on falling l...

Page 29: ...F Maximum Temperature HT option 650 degrees F 650 degree F Dead Band 0 35 inch 0 35 inch Electrical Area Classification Class I Div I Grp B C D 4 3 3 MOUNTING The MGS 700EX 900EX 2 is mounted to the MAG GAGE chamber with all 316 Stainless Steel worm gear pipe clamps The switch must be mounted with TOP facing up Rod mounted switch assemblies are available as a factory installed option Switch points...

Page 30: ...it is de energized Note Keep cover tightly closed when in operation To prevent ignition of GRP B atmospheres a approved sealing fitting must be installed 4 3 5 ELECTRICAL WIRING RISING LEVEL N O Red Terminal 1 4 Closes on rising level C Green Terminal 2 5 N C Blue Terminal 3 6 Opens on rising level 4 3 6 ELECTRICAL WIRING FALLING LEVEL N C Red Terminal 1 4 Opens on falling level C Green Terminal 2...

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