Emerson MR108 Instruction Manual

Type MR108Instruction ManualForm 5875October 2014D103247X012www.fisherregulators.comType MR108 Direct-Operated Backpressure Regulator!WARNINGFailure t

Type MR10810!WARNINGTo avoid personal injury or damage of internal parts from a pressure-loaded actuator, carefully vent the regulator spring case pre

Type MR10811Disassembly!WARNINGTo avoid personal injury resulting from sudden release of pressure, isolate the regulator from all pressure and cautiou

Type MR10812the body ange. Install the valve spring (key 9) and install the actuator on the body ange by screwing the adaptor (90 to 130 ft-lbs / 12

Type MR10813NoteExercise care to ensure that the actuator stem (key 40) enters and exits the lower diaphragm head bore without pinching, cutting or da

Type MR10814Note For pressure-loaded actuator option skip with upper casing welding assembly (key 87).20. Inst

Type MR1081510. If it is desired to replace the stem O-rings and bearings (keys 47 and 46, details X and Z), disconnect the control line tubing. Remo

Type MR1081622. Install the spring case (key 70) over the control spring (key 68) and upper spring seat (key 69) and on top of the upper diaphragm ca

Type MR10817*Recommended spare part.Inconel® is a mark owned by Special Metals Corporation.Key Description Part Number 2 Body Flange (continued)

Type MR10818* Recommended spare part.Key Description Part Number15* Upper Seal (NACE) For NPS 1 / DN 25 Body Size Nitrile (NBR) 14A6789

Type MR10819L1L1L1L1L1L1L1L1L1L1L1L1L1L1L1L3SSSS122939847465535755267668716952646665636256585161214011439131617Figure 4. Type MR108 Direct-Operated Ba

Type MR1082The Specications section on this page provides the ratings and other specications for the Type MR108. The following informat

Type MR10820Key Description Part Number48* Jam Nut (NACE) (2 required) Zinc-plated steel 1A94632412249* Belleville Spring Washer (NACE) GG0

Type MR10821GE38436Figure 4. Type MR108 Direct-Operated Backpressure Regulator Assemblies (continued)APPLY LUBRICANT OR SEALANT(1):L1 = MULTI-PURPOSE

Type MR10822Figure 4. Type MR108 Direct-Operated Backpressure Regulator Assemblies (continued)HIGH-PRESSURE ACTUATOR OPTIONGE38436NOTE: KEYS 64 AND 71

Type MR10823Figure 4. Type MR108 Direct-Operated Backpressure Regulator Assemblies (continued)DETAIL Y DETAIL ZDETAIL V DETAIL WDETAIL XGE384361. Lubr

Type MR108©Emerson Process Management Regulator Technologies, Inc., 2010, 2014; All Rights ReservedThe Emerson logo is a trademark and service mark of

Type MR1083IntroductionScope of the ManualThis instruction manual provides installation, adjustment, maintenance and parts ordering information for Ty

Type MR1084TYPE MR108 WITH LOW-PRESSURE ACTUATORCONTROL SPRINGACTUATORACTUATOR STEMCAGEVALVE SPRINGVALVE PLUGDIAPHRAGMLINE CONNECTION

Type MR1085PART NAME AND KEY NUMBERTORQUENPS  Body SizeNPS  Body SizeNPS  Body SizeNPS  Body SizeFt-Lbs m F

Type MR1086Installation!WARNINGPersonal injury or system damage may result if this regulator is installed, without appropriate overpressure protection

Type MR1087Upstream Control Line Installation!WARNINGPersonal injury, equipment damage or if the bonnet (key 6

Type MR1088Overpressure Protection!WARNINGPersonal injury, equipment damage or leakage due to escaping accumulated gas or bursting of pressure-contain

Type MR1089The factory setting of the backpressure regulator is the midpoint of the spring range unless otherwise specied on order. The allowable spr