Type LR125 Pressure Reducing Liquid Regulator • Rugged design • Reliable • Thoroughly tested • Internally actuated • Compact • , 2, 3, 4 in. body sizes 1 • ecommended for water R and oil applications • ull SST construction F available for harsh environments • API 614 Compliant Figure 1. Type LR125 Pressure Reducing Liquid Regulator Introduction The Type LR125 pilot-operated, pressure reducing regulator is designed for liquid industrial/commercial applications. The Type LR125 provides smooth operation, tight shutoff and long life. Its internally actuated metal plug eliminates disadvantages associated with flexible element style regulators, and the specially engineered flow path deflects debris, protecting the seat from damage and erosion. The Type LR125 is used in conjunction with a Type MR95H/MR95HP pilot and Type 112 restrictor. An internal inlet strainer prevents large particles from entering the main valve, limiting damage to internal parts. Tight Shutoff—The Type LR125 uses a diaphragm and metal plug, eliminating the disadvantages of flexible element style regulators. When open, the metal plug deflects particles and debris away from the diaphragm. The result is enhanced resistance to particle erosion, which provides excellent shutoff over an extended life. When closed, loading pressure and the main spring push the diaphragm onto the taperededged

Type LR125 Specifications The Specifications section lists the specifications for the Type LR125 regulator. Factory specification is stamped on the nameplate fastened on the regulator at the factory. Options •  Pre-piped Pilot Supply •  Travel Indicator Construction Materials Type LR125 Main Valve Body: WCC Steel, CF8M or CF3M Stainless Steel Bonnet: Steel or Stainless Steel Bonnet Bushing: Steel or Stainless Steel Cage: Stainless steel Spring: Stainless steel Top Plug: Stainless steel Bottom Plug: Stainless steel Internal Inlet Strainer: Stainless steel Diaphragm: Nitrile (NBR) or Fluorocarbon...

TRIM PACKAGE TYPE LR125 PRESSURE REDUCING REGULATOR Figure 2. Type LR125 Features and Benefits style regulators. To prevent damage, the diaphragm is fully supported in both the open and closed positions. These features enable the Type LR125 components to work longer with less wear and tear. 5 Full Usable Capacity—Fisher™ branded regulators are laboratory tested. One hundred percent of the published flow capacity can be used with confidence. Thorough Laboratory Testing—Emerson Process Management Regulator Technologies, Inc. (Emerson) state-of-the-art flow laboratory allows thorough testing of...

TYPE MR95H/MR95HP PILOT TYPE MR95H/MR95HP PILOT TYPE 112 RESTRICTOR TYPE 112 RESTRICTOR CONTROL SPRING CONTROL SPRING DIAPHRAGM DIAPHRAGM SUPPLY LINE SUPPLY LINE VALVE PLUG VALVE PLUG MAIN SPRING MAIN SPRING DIAPHRAGMAND DIAPHRAGM AND PLUG ASSEMBLY PLUG ASSEMBLY INLET PRESSURE INTERNAL STRAINER INTERNAL STRAINER OUTLET PRESSURE ATMOSPHERIC PRESSURE LOADING PRESSURE TYPE LR125 WITH TYPE MR95H/MR95HP PILOT AND TYPE 112 RESTRICTOR Figure 3. Type LR125 Operational Schematic 11 Easy-to-Maintain—The pilot is designed to allow quick and simple in-line trim inspection and parts replacement. Powder Paint...

Type LR125 Table 1. Type LR125 Main Valve Body Sizes, End Connection Styles, Structural Design Ratings and Maximum Operating Inlet Pressures(1) MAIN VALVE BODY SIZE In. MAIN VALVE BODY MATERIAL MAXIMUM OPERATING INLET PRESSURE(3) psig bar psig NPT or SWE (1 and 2 in. only) 1500 103 600 CL150 RF 290 20.0 290 WCC Steel CL300 RF 750 51.7 CL600 RF 1500 103 600 PN 16/25/40 RF(4) 580 40.0 1, 2, 3 and 4 25, 50, 80 and 100 NPT (1 and 2 in. only) 1440 99.2 550 CL150 RF 275 19.0 275 CF8M Stainless steel CL300 RF 720 49.6 CL600 RF 1440 99.2 550 PN 16/25/40 RF(4) 580 40.0 1. The pressure/temperature limits...

OUTLET PRESSURE (P2) OUTLET PRESSURE (P2) psig / bar psig / bar INLET PRESSURE (P1) INLET PRESSURE (P1) psig / bar psig / bar SIZABLE REGION INCIPIENT CAVITATION REGION FULL CAVITATION REGION Figure 4. Cavitation Sizing for Water Table 6. Main Valve Minimum Differential Pressures(1) MAIN VALVE BODY SIZE In. 19B0781X022, Light Blue and White MINIMUM DIFFERENTIAL, PERCENT OF CAPACITY DIAPHRAGM MATERIAL MAIN SPRING PART NUMBER AND COLOR 1. See Table 1 for structural design ratings and Table 2 for pilot rating. Table 7. Flow and Sizing Coefficients for Type LR125 Main Valve at 100% Capacity MAIN...

Type LR125 Table 9. Type 112 Restrictor Flow Coefficients RESTRICTOR SETTING Table 10. Approximate Weights Including Type MR95H/MR95HP Pilot and Restrictor MAIN VALVE BODY, LBS / kg Installation The robust design of the Type LR125 allows this regulator to be installed indoors or outdoors. This regulator is designed to withstand the elements. The powder paint coating protects regulator against minor impacts, abrasions and corrosion. When installed outdoors, the Type LR125 does not require protective housing. However, the Type MR95H/MR95HP pilot should be oriented so that the pilot spring case...

Type LR125 Table 11. Cv(1) at % Droop (Pressure Offset Below Setpoint)(2) SPRING RANGE AND COLOR 80 to 400 psig / 5.5 to 27.6 bar Silver Spring     – Exceeds recommended maximum pressure drop ratio of 0.65. 1. Type LR125 on liquid service with 1/2 NPT Type MR95H/MR95HP Pilot, 100% Cage Capacity with internal inlet strainer and Type 112 Restrictor Setting of “4”. 2. Values published in this table are laboratory tested and are presented based on % droop (negative control deviation only) or pressure offset below setpoint.

Type LR125 Table 12. Capacity(1), Water (GPM / L/min) for 1 and 2 in. / DN 25 and 50 Bodies at % Droop (Pressure Offset Below Setpoint)(2) SPRING RANGE AND COLOR OUTLET PRESSURE psig

Type LR125 Table 12. apacity(1), Water (GPM / L/min) for 3 and 4 in. / DN 80 and 100 Bodies at % Droop (Pressure Offset Below C Setpoint)(2) (continued) SPRING RANGE AND COLOR OUTLET PRESSURE psig 15