Type LR125 Pressure Reducing Liquid Regulator • Rugged design • Reliable • Thoroughly tested • Internally actuated • Compact • 1, 2, 3, 4-inch body sizes • Recommended for water and oil applications • Full SST construction available for harsh environments • API 614 Compliant Figure 1. Type LR125 Pressure Reducing Liquid Regulator Introduction the specially engineered ow path deects debris, protecting the seat from damage and erosion. The Type LR125 is used in conjunction with a Type 95H pilot and Type 112 restrictor. An internal inlet strainer prevents large particles from entering the main valve, limiting damage to internal parts. D103575X012 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 exible element style regulators, and

Bulletin 71.2: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 3 High Accuracy—Multiple control pressure ranges offered by Type 95H pilot and lower accuracy class inherent to pilot operated pressure regulator design provide the Type LR125 with tight and accurate control. Long Life—The robust design of the Type LR125 with its metal plug and specially engineered ow path allows ow through the regulator without seat impingement. The diaphragm design eliminates the possibility of taking a “set”, a common problem with exible element style regulators. To prevent damage,...

Bulletin 71.2:LR125 sure the vent is protected so that rain, moisture, insects or any debris will not accumulate inside or block the vent assembly. When installed indoors, install remote venting of the pilot spring case as required by applicable codes and regulations. 7 Overpressure Protection Overpressuring any portion of a regulator or associated equipment may cause personal injury, leakage or property damage due to bursting of pressure-containing parts. Provide appropriate pressure relieving or pressure limiting devices to ensure that the limits in the Specifications section are not exceeded....

Bulletin 71.2:LR125 TYPE 95H PILOT CONTROL SPRING SUPPLY LINE VALVE PLUG MAIN SPRING DIAPHRAGM AND PLUG ASSEMBLY INLET PRESSURE INTERNAL STRAINER OUTLET PRESSURE ATMOSPHERIC PRESSURE LOADING PRESSURE TYPE LR125 WITH TYPE 95H PILOT AND TYPE 112 RESTRICTOR Figure 3. Type LR125 Operational Schematic Table 1. ype LR125 Main Valve Body Sizes, End Connection Styles, Structural Design Ratings and Maximum Operating T Inlet Pressures(1) MAIN VALVE BODY SIZE Inch MAIN VALVE BODY MATERIAL MAXIMUM OPERATING INLET PRESSURE(3) 1. The pressure/temperature limits in this Bulletin and any applicable standard...

OUTLET PRESSURE (P2) psig / bar INLET PRESSURE (P1) psig / bar CONTINUOUS SERVICE REGION INTERMITTENT SERVICE REGION FULL CAVITATION REGION Figure 4. Cavitation Sizing for Water Table 2. Type 95H Pilot Maximum Cold Working Pressure(1)(2) BODY SIZE BODY AND SPRING CASE MATERIAL Steel Stainless steel MAXIMUM INLET PRESSURE 300 psig / 20.7 bar 300 psig / 20.7 bar MAXIMUM OUTLET PRESSURE 300 psig / 20.7 bar 300 psig / 20.7 bar 1. The pressure/temperature limits in this Bulletin, and any applicable standard or code limitation should not be exceeded. 2. Temperature and/or the body end connection may...

Bulletin 71.2:LR125 Table 5. Main Valve Minimum Differential Pressures(1) MAIN VALVE BODY SIZE Inch MINIMUM DIFFERENTIAL, PERCENT OF CAPACITY Diaphragm Material Diaphragm Code Nitrile (NBR), Low Minimum Differential Nitrile (NBR), High Erosion Resistance Fluorocarbon (FKM), High Temperature Capability Nitrile (NBR), Low Minimum Differential Nitrile (NBR), High Erosion Resistance Fluorocarbon (FKM), High Temperature Capability Nitrile (NBR), Low Minimum Differential Nitrile (NBR), High Erosion Resistance Fluorocarbon (FKM), High Temperature Capability Nitrile (NBR), Low Minimum Differential Nitrile...

Bulletin 71.2:LR125 Capacity Information The capacity information on the following pages is based on four % droop, 10%, 20%, 30% and 40%. Droop is the negative control deviation or pressure offset below the setpoint of the regulator. Note Flow capacities are laboratory verified; therefore, regulators may be sized for 100% flow published capacities. It is not necessary to reduce published capacities. Table 10 shows Cv values at different % droop and selected inlet pressures and outlet pressure settings. Table 11 shows the liquid regulating capacities of the Type LR125 regulator at selected inlet...

Bulletin 71.2:LR125 Table 11. Capacity(1), Water (GPM / L/min) for 1 and 2-inch / DN 25 and 50 Bodies at % Droop (Pressure Offset Below Setpoint)(2) SPRING RANGE AND COLOR OUTLET PRESSURE psig GPM L/min GPM L/min GPM L/min GPM L/min GPM L/min GPM L/min GPM L/min GPM L/min 1. Type LR125 on liquid service with 1/2 NPT Type 95H 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. Exceeds recommended...

Bulletin 71.2:LR125 Table 11. Capacity(1), Water (GPM / L/min) for 3 and 4-inch / DN 80 and 100 Bodies at % Droop (Pressure Offset Below Setpoint)(2) (continued) SPRING RANGE AND COLOR OUTLET PRESSURE psig GPM L/min GPM L/min GPM L/min GPM L/min GPM L/min GPM L/min GPM L/min GPM L/min 1. Type LR125 on liquid service with 1/2 NPT Type 95H 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. Exceeds...