Type MR105 Direct-Operated Pressure Reducing Regulators TYPE MR105 DIRECT-OPERATED REGULATOR WITH LOW-PRESSURE ACTUATOR TYPE MR105 DIRECT-OPERATED REGULATOR WITH HIGH-PRESSURE ACTUATOR Figure 1. Type MR105 Direct-Operated Pressure Reducing Regulators  • Travel Indicator  • Large Flow  • Stability  • Fast Response   •  Steel and Stainless Steel Constructions Meet API 614 Requirements   • Available Constructions to Meet NACE MR0175-2003 and NACE MR0103 Requirements for Sour Gas Service Capability  • Multiple Trim Materials Available   •  ANSI/FCI 70-3-2004 Class VI Shutoff  • Multiple End Connection Options  • P1 = P2 on High-Pressure Actuator   •  Suitable for High-Temperature Applications up to 250°F / 121°C   •  Easy Access to Trim Parts  • Drain Valve   •  Bleed valve (for High-Pressure Actuator only)   •  Arctic Temperature Constructions

Type MR105 Specifications The Specifications section on this page provides the ratings and other specifications for the Type MR105. The following information is stamped on the nameplate fastened on the regulator at the factory: type; body size; maximum inlet, outlet and differential pressure; maximum pressure above setpoint; maximum casing pressure; maximum temperature; spring range; cage type; and trim and diaphragm material. Body Sizes and End Connection Styles See Table 1 Downstream Control Line Connection Size 1/2 NPT Shutoff Classification per ANSI/FCI 70-3-2004 Class VI (Soft Seat) Maximum...

Type MR105 Table 1. Body Sizes and End Connection Styles END CONNECTION STYLE Body Size NPS 1 and 2 / DN 25 and 50 NPS 3 and 4 / DN 80 and 100 BODY MATERIAL Cast iron 1. Optional NACE construction available. 2. Constructions meet API 614 requirements. Table 2. Outlet Pressure Ranges BODY SIZE, NPS 1 AND 2 / DN 25 AND 50 Actuator Type High Pressure Spring Part Number Spring Color Code White Silver Orange Red Green White Silver Orange Spring Free Length In. Maximum Pressure Over Setpoint to Avoid Internal Parts Damage psig bar 20 BODY SIZE, NPS 3 AND 4 / DN 80 AND 100 Actuator Type High Pressure...

Type MR105 Table 3. Maximum Inlet, Outlet and Emergency Casing Pressures(1) BODY MATERIAL Cast Iron MAXIMUM INLET PRESSURE 1. Based on a maximum temperature of 250°F / 121°C. 2. Maximum outlet and emergency casing pressures for constructions with Fluorocarbon (FKM) diaphragm are limited to 230 psig / 15.8 bar or the body rating limit, whichever is lower. Arctic Temperature Constructions—For process temperatures as low as -76°F / -60°C. ANSI/FCI 70-3-2004 Class VI Shutoff—Soft-seat valve plug disks for tight shutoff. Multiple End Connection Options—Type MR105 is available in several end connection...

VALVE SPRING VALVE PLUG SEAT RING ACTUATOR STEM ACTUATOR DIAPHRAGM TYPE MR105 WITH LOW-PRESSURE ACTUATOR VALVE SPRING VALVE PLUG SEAT RING CAGE ACTUATOR STEM DIAPHRAGM CONTROL SPRING TYPE MR105 WITH HIGH-PRESSURE ACTUATOR M1181 INLET PRESSURE INLET PRESSURE OUTLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE ATMOSPHERIC PRESSURE Figure 2. Type MR105 Operational Schematic

Type MR105 FILTER 2 PUMP 2 TYPE MR105 PRESSURE REDUCING REGULATOR TO EQUIPMENT BEARINGS, SEALS OR SERVO-CONTROLS TYPE MR108 BACKPRESSURE REGULATOR Figure 3. Lube Oil Skid Diagram of damage from external sources or from debris in the pipeline. A regulator should be inspected for damage periodically and after any overpressure condition. Refer to the relief sizing coefficients in the Specifications and the Capacity Information section to determine the required relief valve capacity. Installation Vertical installation with the actuator installed directly above or below the main valve is recommended...

WORKER CONTROL LINE SET HIGHER THAN WORKER REGULATOR MONITOR CONTROL LINE TYPE MR105 MONITOR REGULATOR TYPE MR105 WORKER REGULATOR INLET PRESSURE OUTLET PRESSURE INLET PRESSURE INLET PRESSURE ATMOSPHERIC PRESSURE OUTLET PRESSURE OUTLET PRESSURE INTERMEDIATE PRESSURE ATMOSPHERIC PRESSURE ATMOSPHERIC PRESSURE Figure 4. Type MR105 Monitor Regulator Operational Schematic • Oil flows to large rotating equipment lubricating bearings, e.g. turbines and compressors. The loss of pressure or flow to the bearings or these turbomachinery assets may shut down the equipment or even the whole plant. Failure...

Type MR105 Table 4. Maximum Differential Pressures ACTUATOR TYPE High Pressure MAXIMUM DIFFERENTIAL PRESSURE Gas Service (Linear Cage) Liquid Service (Quick Opening Cage) psid bar d psid bar d 200 13.6 400 or maximum 27.6 or maximum 200 13.6 inlet pressure, inlet pressure, 225 15.5 whichever is lower whichever is lower 225 15.5 250 17.2 400 or maximum 27.6 or maximum 200 13.6 inlet pressure, inlet pressure, 225 15.5 whichever is lower whichever is lower 250 17.2 Table 5. Wide-Open Flow and IEC Sizing Coefficients Body Size NPS 1 2 3 4 Wide-Open Flow Coefficient Line Size Equals Body Size Cg Cv...

Type MR105 Table 6. Construction Materials PART NAME Cast Iron, CF8M, CF3M Stainless steel Body Flange Actuator Casings - Low Pressure Actuator Casings - High Pressure Internal Stiffener Plate Spring Case Spring Case Spacer Zinc-Plated steel Stainless steel CF3M/CF8M (Quick Opening), CF8M (Linear) Stainless Steel Valve Plug and Seat Ring 316, 316L, S20910 (Nitronic 50) Stainless steel (NPS 1 / DN 25 body size only) 416 Stainless steel Inconel® X750 Closing Spring Stem Lower Diaphragm Support S20910 (Nitronic 50) Stainless steel Upper Diaphragm Plate Cast Iron Control/Set Spring Spring Seats Zinc-Plated...

Type MR105 Table 7. Typical Air CV Coefficient with Linear Cage - Setpoint Made at 10% Flow (for Type MR105 with Low-Pressure Actuator) SPRING RANGE, PART NUMBER AND COLOR

Type MR105 Table 7. Typical Air CV Coefficient with Linear Cage - Setpoint Made at 10% Flow (for Type MR105 with Low-Pressure Actuator) (continued) INLET PRESSURE SPRING RANGE, PART NUMBER AND COLOR