Emerson LR128 Datasheet

Bulletin 71.4:LR128D103577X012November 2014www.fisherregulators.comType LR128 Relief Valve or Backpressure Liquid RegulatorFigure 1. Type LR128 Relief

Bulletin 71.4:LR12810Capacity InformationNoteFlow capacities are laboratory veried; therefore, regulators may be sized for 100% ow published capacit

Bulletin 71.4:LR12811SPRING RANGE, PART NUMBER AND SPRING COLORSET PRESSUREBODY SIZE1 In. / DN 25 2 In. / DN 50 3 In. / DN 80 4 In. / DN 100psig bar

Bulletin 71.4:LR12812SPRING RANGE, SPRING PART NUMBER ANDSPRING COLORSET PRESSUREBODY SIZE1 In. / DN 25 2 In. / DN 50psig bar10% 20% 30% 40% 10% 20% 3

Bulletin 71.4:LR12813Table 13. Capacity(1), Water (GPM / L/min) for 3 and 4 in. / DN 80 and 100 Bodies at % Offset (Pressure Build-Up Above Setpoint

Bulletin 71.4:LR12814Figure 5. Type LR128 Dimensions Schematic Table 15. Type LR128 DimensionsBODYSIZE, In. / DNDIMENSIONS, In. / mmA BD D1E GMT VCL15

Bulletin 71.4:LR12815Ordering InformationCarefullyrevieweachspecicationonpage2,thencompletetheOrderingGuideonthispage.Ifapilotsetpo

Bulletin 71.4:LR128©Emerson Process Management Regulator Technologies, Inc., 2012, 2014; All Rights ReservedThe Emerson logo is a trademark and servic

Bulletin 71.4:LR1282SpecicationsMain Valve Body Sizes, End Connection Styles and Structural Design Ratings(1)(2) See Table 1Maximum Inlet Pressure(1

Bulletin 71.4:LR12831091326TYPE MR98H PILOTTYPE LR128 RELIEF VALVE OR BACKPRESSURE REGULATOR57TRIM PACKAGEW739811TYPE MR98H PILOTFigure 2. Type LR128

Bulletin 71.4:LR128481291011W734578124Figure 2. Type LR128 Features and Bene ts (continued)and shows the actual valve position. The travel indicator

Bulletin 71.4:LR1285MAIN VALVE BODY SIZEMAIN VALVE BODY MATERIALEND CONNECTION STYLE(2)STRUCTURAL DESIGN RATING(3)MAXIMUM OPERATING RELIEF (INLET) PR

Bulletin 71.4:LR1286Figure 3. Type LR128 Operational SchematicINLET PRESSUREOUTLET PRESSUREATMOSPHERIC PRESSURELOADING PRESSURETYPE LR128 WITH TYPE MR

Bulletin 71.4:LR1287the elements. The powder paint coating protects against minor impacts, abrasions and corrosion. When installed outdoors, the Type

Bulletin 71.4:LR1288Table 4. Build-up Pressure Needed to Begin Opening and Fully Open Main Valve and Pressure Drop Needed to Reseat PilotSPRING RANGE

Bulletin 71.4:LR1289Table 5. Type LR128 Main Valve Minimum Differential Pressure(1)MAIN VALVE BODY SIZEDIAPHRAGMMINIMUM DIFFERENTIAL, PERCENT OF CAPA