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Emerson Fisher LR125 Series, Instruction Manual

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Emerson Fisher LR125 Series Instruction Manual Download Page 21

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8

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26

3

25

19

3

Type LR125

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48B2142_C

B2617_D

48B2142_C

19B2408

Figure 11. 

Type LR125 Nameplate and Flow Arrow

Figure 12. 

Type LR125 1 in. / DN 25 Diaphragm Assembly

Figure 13. 

Type LR125 Cage O-ring Placement

Figure 14. 

Type LR125 Travel Indicator Plug Option

TOP PLUG (KEY 5)

O-RING (KEY 14)

O-RING (KEY 70)

DIAPHRAGM (KEY 9)

BOTTOM PLUG (KEY 11)

O-RING (KEY 10)
LOCK WASHER (KEY 130)

SOCKET HEAD 

SCREW (KEY 129)

2, 3 AND 4 IN. / DN 50, 80 AND 100 BODY SIZES

Summary of Contents for Fisher LR125 Series

Page 1: ...agement Regulator Technologies Inc Emerson instructions If the regulator discharges process fluid or a leak develops in the system service to the unit may be required Failure to correct trouble could result in a hazardous condition Call a qualified service person to service the unit Installation operation and maintenance procedures performed by unqualified personnel may result in improper adjustme...

Page 2: ...hragm Nitrile NBR or Fluorocarbon FKM O rings Nitrile NBR or Fluorocarbon FKM Flanged Locknut Stainless steel Backup Rings Polytetrafluoroethylene PTFE Upper Spring Seat Stainless steel Indicator Protector and Cover Plastic Indicator Stem Stainless steel Indicator Fitting Stainless steel Travel Indicator Plug Stainless steel Type MR95H MR95HP Pilot Body WCC Steel or CF8M Stainless steel Spring Cas...

Page 3: ...e to escaping process fluid or bursting of pressure containing parts may result if this regulator is overpressured or is installed where service conditions could exceed the limits given in Specifications section or where conditions exceed any ratings of the adjacent piping or piping connections To avoid such injury or damage provide pressure relieving or pressure limiting devices as required by th...

Page 4: ...T PRESSURE ATMOSPHERIC PRESSURE LOADING PRESSURE Figure 2 Type LR125 Operational Schematic CONTROL SPRING TYPE MR95H MR95HP PILOT TYPE 112 RESTRICTOR VALVE PLUG MAIN SPRING DIAPHRAGM AND PLUG ASSEMBLY INTERNAL STRAINER SUPPLY LINE DIAPHRAGM ...

Page 5: ...ation is recommended before the main valve and in the pilot supply piping See the Specifications section for the corresponding mesh size of the internal inlet strainer 2 A Type LR125 regulator may be installed in any orientation as long as flow through the regulator matches the direction of the arrow on the main valve body and the pilot vent is pointed down However for easier maintenance install t...

Page 6: ...7E88 Fluorocarbon FKM 300 20 7 300 20 7 300 20 7 Green and White 600 41 4 500 34 600 41 4 Red 2 3 80 17E68 Nitrile NBR 300 20 7 300 20 7 300 20 7 Light Blue and White 17E97 Nitrile NBR 300 20 7 300 20 7 300 20 7 Light Blue and White 600 41 4 600 41 4 600 41 4 Black and White 2 17E88 Fluorocarbon FKM 300 20 7 300 20 7 300 20 7 Light Blue and White 600 41 4 500 34 600 41 4 Black and White 2 4 100 17...

Page 7: ...d to keep the supply source from clogging the restrictor or pilot Inspect and clean this filter regularly to make sure it has not been plugged which can prevent proper regulator operation 8 Install a downstream pressure control line with a minimum size of 1 2 in 13 mm as shown in Figure 3 to the pilot control line or outlet connection Connect the other end of the control line at a minimum of 8 to ...

Page 8: ...ecreased Performance 112 Restrictor Adjustment Guide 112 Restrictor Adjustment Guide REGULATOR PERFORMANCE 2 4 6 8 Accuracy Hysteresis Stability Speed of Response Demand Decrease Speed of Response Demand Increase Increased Performance Decreased Performance TYPE 112 RESTRICTOR SETTING Type LR125 8 W4559_1 11B5004 A PILOT SUPPLY CONNECTION 1 4 NPT PIPE CONNECTS TO UPSTREAM PILOT SUPPLY TAP LOADING C...

Page 9: ... used to adjust performance according to application conditions The recommended initial setting is 4 Shutdown If pilot supply pressure is shut down first the downstream system may be subjected to full inlet pressure 1 If the pilot setting must be disturbed be sure to keep some tension on the spring This will prevent trapping inlet pressure during blow down 2 Close the valves shown in Figure 3 in t...

Page 10: ...ravel indicator assembly threads key 19 and screw it into the bonnet key 2 See Travel Indicator Assembly Maintenance for maintenance 8 Install the bonnet key 2 in proper orientation 9 Lubricate cap screws key 3 and secure the bonnet key 2 using an even crisscross pattern It may be necessary to push down on bonnet to start cap screws Tighten cap screws to proper torque see Table 9 Diaphragm and Plu...

Page 11: ...sassemble carefully release all pressures according to the shutdown procedure Use gauges to monitor inlet loading and outlet pressures while releasing these pressures 1 Remove the indicator protector key 22 Figure 10 and indicator cover key 21 2 Remove the first hex nut key 4 and the indicator washer key 20 3 Unscrew but do not completely remove the second hex nut key 4 on the top of the indicator...

Page 12: ...s instructions for disassembly and replacement of parts All key numbers refer to Figure 15 1 Unscrew the valve plug guide key 5 from the body key 1 The valve plug spring key 26 and the valve plug key 4 will normally come out of the body along with the valve plug guide 2 Inspect the seating surface of the valve plug key 4 make sure that the elastomer or polished metal surface of the valve plug is n...

Page 13: ... THICKNESS INK CODE USE ONE LOCATION ONLY MANUFACTURER CODE MATERIAL INK CODE LOCATE INK CODE BETWEEN RADII Figure 9 Diaphragm Markings Table 7 Diaphragm Imprint Codes THICKNESS MATERIAL DIAPHRAGM MATERIAL Imprint Ink Code Imprint Ink Code 2 130 2 17E68 17E68 Nitrile NBR Low minimum differential 4 17E88 17E88 Fluorocarbon FKM High temperature capability 5 17E97 17E97 Nitrile NBR High erosion resis...

Page 14: ...gm surfaces for erosion or trapped debris Check pilot valve plug and seat for seating surface damage or debris Check pilot for trapped debris Regulator will not open Check for clogged control line Make sure control line is installed and open Check for damage to the main valve diaphragm On new installations make sure the control line and pilot supply are properly connected Regulator will not close ...

Page 15: ...T GE10588X012 SWE GE10682X012 CL150 RF GE10676X012 CL300 RF GE10678X012 CL600 RF GE10679X012 PN 16 25 40 RF GE12898X012 CF8M Stainless Steel NPT GE10588X022 CL150 RF GE10676X022 CL300 RF GE10678X022 CL600 RF GE10679X022 PN 16 25 40 RF GE12898X022 CF3M Stainless Steel CL150 RF GE10676X042 3 80 WCC Steel CL150 RF GE10699X012 CL300 RF GE10700X012 CL600 RF GE10701X012 PN 16 25 40 RF GE13594X012 CF8M S...

Page 16: ...tion to put the regulator back into operation Parts Ordering When corresponding with your local Sales Office about this equipment reference the equipment serial number or FS number found on a nameplate attached to the bonnet When ordering replacement parts reference the key number of each needed part as found in the following parts list Separate kit containing all recommended spare parts is availa...

Page 17: ... 100 bodies Nitrile NBR 10A3803X062 Fluorocarbon FKM 10A3803X032 15 Stem Stainless steel For bodies with travel indicator 1 and 2 in DN 25 and 50 bodies T14185T0012 3 and 4 in DN 80 and 100 bodies T21074T0012 16 Back up Ring PTFE For bodies with travel indicator 2 required 1 and 2 in DN 25 and 50 bodies 1N659106242 3 and 4 in DN 80 and 100 bodies 1J418806992 17 Upper Spring Seat Stainless steel Fo...

Page 18: ...01905A0 Fluorocarbon FKM Seat Type MR95H ERCA00635B0 Type MR95HP ERAA01905A3 5 Valve Plug Guide Stainless steel GF05519X022 6 Stem Assembly Stainless steel ERAA01904A0 7 Stem Guide Bushing Stainless steel ERCA03694A0 8 Lower Spring Seat Stainless steel Type MR95H 1E3954X0042 Type MR95HP ERCA00436A1 9 Upper Spring Seat Type MR95H Zinc plated carbon steel ERCA00823A0 Stainless steel ERCA00823A1 Type...

Page 19: ... L1 L1 130 129 Type LR125 19 49B6019_A MAIN VALVE ASSEMBLY FOR 1 IN DN 25 BODY SIZE APPLY LUBRICANT 1 L1 LITHIUM POLYMER TYPE LUBRICANT MULTI PURPOSE GREASE L2 ANTI SEIZE LUBRICANT 1 Lubricants must be selected such that they meet the temperature requirements Figure 10 Type LR125 Main Valve ...

Page 20: ...E ASSEMBLY FOR 2 3 AND 4 IN DN 50 80 AND 100 BODY SIZES APPLY LUBRICANT SEALANT 1 L1 LITHIUM POLYMER TYPE LUBRICANT MULTI PURPOSE GREASE L2 ANTI SEIZE LUBRICANT S MEDIUM STRENGTH THREADLOCKER 1 Lubricants and sealant must be selected such that they meet the temperature requirements Figure 10 Type LR125 Main Valve continued ...

Page 21: ...gure 12 Type LR125 1 in DN 25 Diaphragm Assembly Figure 13 Type LR125 Cage O ring Placement Figure 14 Type LR125 Travel Indicator Plug Option TOP PLUG KEY 5 O RING KEY 14 O RING KEY 70 DIAPHRAGM KEY 9 BOTTOM PLUG KEY 11 O RING KEY 10 LOCK WASHER KEY 130 SOCKET HEAD SCREW KEY 129 2 3 AND 4 IN DN 50 80 AND 100 BODY SIZES ...

Page 22: ...PLY LUBRICANT SEALANT 1 L1 GENERAL PURPOSE PTFE OR LITHIUM GREASE L2 ANTI SEIZE COMPOUND 1 Lubricant and sealant must be selected such that they meet the temperature requirements 2 Apply L2 anti seize compound on key 16 for Stainless steel bolts Figure 15 Type MR95H MR95HP Pilot Assembly ...

Page 23: ... S THREAD SEALANT L ANTI SEIZE LUBRICANT 1 Lubricant and sealant must be selected such that they meet the temperature requirements Figure 16 Type 112 Restrictor TYPE MR95H MR95HP PILOT TYPE 112 RESTRICTOR Figure 17 Standard Type LR125 with Type MR95H MR95HP Pilot and Type 112 Restrictor ...

Page 24: ... Electric Co All other marks are the property of their prospective owners Fisher is a mark owned by Fisher Controls International LLC a business of Emerson Automation Solutions The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regard...

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