Technical Specifications / Parameters Parameter Specification Model Fisher Type RPE Type Pilot-Operated, Full-Nozzle, Safety Relief Valve Size & Pressure Class Sizes: 1D (1"x2") through 6T (6"x8") and larger. Inlet/Outlet: Standardly complies with API 526 flanged connections (D through T). Pressure Class: ANSI Classes 150, 300, 600, 900, 1500, 2500. Set Pressure Range Typically from 15 psig to 6000 psig (1 bar to 414 bar), depending on the specific pilot and main valve design. Temperature Range Standard: -450°F to +1000°F (-268°C to +538°C), depending on pilot and body materials. Body Materials Carbon Steel (WCB), Stainless Steel (CF8M), Alloy Steels (WC6, WC9). Trim Materials Stainless Steel (standard), other alloys available. Pilot Options • Standard Pilot: For general purpose gas/vapor and liquid service. • Bellows Pilot: For variable or high superimposed backpressure. • Soft Seat Pilot: For bubble-tight shutoff. • Liquid Pilot: Optimized for liquid applications. • T&P Pilot: For thermal relief. Blowdown Adjustable, typically from 2% to 20%. Certifications Can be certified to meet API 520/526/527, ASME Boiler and Pressure Vessel Code, Section VIII, and PED requirements.

Technical Specifications / Parameters Parameter Specification Model Fisher Type OSE (e.g., OSE-1, OSE-2, OSE-3, OSE-4) Type Mechanical, Centrifugal Overspeed Trip Speed Ranges Available in various ranges, typically from ~1000 RPM to over ~10,000 RPM, depending on the specific model and spring. Trip Point Accuracy Typically within ±1% of the set speed. Speed Sensing Direct shaft connection or gear-driven. Output Mechanical lever actuation to trigger a pneumatic trip valve (e.g., Fisher 290 series). Mounting Directly onto the equipment shaft or via a drive coupling. Hazardous Area Approvals The mechanical trip itself is intrinsically safe. The associated pneumatic trip valve is designed for industrial use. Materials Housing: Cast Iron or Carbon Steel; Internal Components: Steel, Stainless Steel, and other hardened alloys. Trip Reset Manual reset required after a trip event.

Technical Specifications / Parameters Parameter Specification Model Fisher Type B Type Pilot-Assisted / Internally Relayed Pressure Regulator Size & Connections Sizes: 2", 3", 4", 6" (NPT) Other: Flanged connections available. Body Material Cast Iron (standard). Internal Materials Stainless Steel (critical parts), Buna-N (diaphragms & seals). Inlet Pressure Range (P1) Up to 400 psig (28 bar) for standard models. Outlet Pressure Range (P2) Common Spring Ranges: Adjustable from 4 oz/in² to 60 psig (0.01 to 4.1 bar). Various springs cover different portions of this wide range. Temperature Range -20°F to 150°F (-29°C to 66°C) - standard elastomers. Flow Capacity (Cg) Example: 2" Type B has a Cv of approximately 95. (Varies by size). Internal Relief Capacity Standard on most models. Capacity varies with model and set pressure. Leakage Class ANSI FCI 70-2 Class IV (Metal-to-metal seat).

Technical Specifications / Parameters Parameter Specification for BLE & BLX Model Fisher Type BLE, Fisher Type BLX Type Multi-stage, Anti-Cavitation & Noise Reduction Trim Compatible Valve Bodies Fisher ED, ES, EWT, and other standard globe valve bodies with cage-style construction. Size Range Typically available for valve sizes from 1" to 12" (DN25 to DN300) and larger. Trim Materials Standard: 316 Stainless Steel (hardened). Options: 17-4PH SST, Stellite, Alloy 20, other corrosion-resistant alloys. Pressure Drop Capability Capable of handling very high pressure drops, often in excess of 1500 psi (100 bar) in a single valve. Flow Characteristic Modified linear or equal percentage. Leakage Class With Metal Seat: ANSI/FCI 70-2 Class IV. With Soft Seat: ANSI/FCI 70-2 Class VI. Flow Capacity (Cv) Defined by the specific trim part number. Both BLE and BLX offer a range of Cv values for a given valve size, but the BLX generally provides a higher Cv for a similar level of attenuation. Noise Reduction Can achieve noise reduction of 15 dBA or more compared to standard single-stage trim. Temperature Limits Limited by the valve body rating, typically up to ~800°F (~425°C).

Technical Specifications / Parameters Parameter Specification Model Fisher EHU Type Pilot-Operated, Spring-Loaded, Pressure Reducing Regulator Body Size & Pressure Class Sizes: 2", 3", 4", 6" (ANSI Flanged) Pressure Class: ANSI Class 300, 400, 600. End Connections Flanged (RF or RTJ). Body Materials Carbon Steel (WCB), Ductile Iron. Trim Materials Stainless Steel (standard). Inlet Pressure Range (P1) Up to 600 psig (~41 bar) for Class 300 models; up to 1440 psig (~99 bar) for Class 600 models. Outlet Pressure Range (P2) Adjustable over a wide range, dependent on the pilot and spring used. Common ranges span from 3 psig to 250 psig (0.2 to 17 bar). Temperature Range Standard: -20°F to +150°F (-29°C to +66°C). Extended: Options available for lower temperatures with weather covers. Pilot Gas Supply Typically filtered and regulated from the main line. Leakage Class Shutoff Class: ANSI/FCI 70-2 Class IV (standard metal seat). Flow Capacity (Cg) Varies by size; for example, a 2" EHU has a Cg of approximately 235, while a 6" EHU can have a Cg over 2000.

Technical Specifications / Parameters Parameter Specification Model Fisher 785C Type I/P (Current-to-Pressure) or E/P (Voltage-to-Pressure) Transducer Input Signal I/P: 4-20 mA DC (standard), other ranges available. E/P: 0-10 VDC (standard), other ranges available. Output Signal Standard: 3-15 psig (0.2-1.0 bar). Other Ranges: 3-27 psig, 6-30 psig, and others are available. Air Supply Pressure 20 to 55 psig (1.4 to 3.8 bar), typically 20 psig (1.4 bar) greater than the required output pressure. Air Consumption Static: Less than 0.2 SCFM (5.7 SLPM). Load: Varies with output. Accuracy Typically ±0.5% of span. Linearity & Hysteresis Typically ±0.5% of span. Repeatability Typically ±0.25% of span. Enclosure Rating NEMA 4X (Weatherproof and Corrosion-Resistant). Hazardous Area Approvals FM, CSA, and ATEX approvals available for Intrinsically Safe (IS) and Non-incendive (NI) applications. Supply Air Connection 1/4" NPT Female Output Air Connection 1/4" NPT Female Electrical Connection 1/2" NPT conduit connection. Ambient Temperature Range Standard: -40°F to +185°F (-40°C to +85°C). Materials Housing: Aluminum (polycarbonate for IS); Internal parts: Brass, Stainless Steel, Buna-N.

Technical Specifications / Parameters Parameter Specification Model Fisher 627 Type Scotch Yoke, Pneumatic Piston Actuator Action Double-Acting (Standard). Convertible to Spring-Return. Standard Air Supply Pressure 40 to 120 psig (2.8 to 8.3 bar). Torque Output Varies by specific size and supply pressure. Example for a size 60 at 80 psig: ~1800 lb-in (~203 Nm). (Refer to factory torque tables for exact values). Temperature Range Standard: -40°F to +180°F (-40°C to +82°C). High-Temp Options: Available with high-temperature seals and lubricants. Spring-Return Options Multiple spring ranges available to provide fail-open or fail-close action. Mounting Style Direct mounting to valve shaft according to ISO 5211 and other industry standards. Position Indicator Visual indicator showing valve position (Open/Closed). Port Connections 1/4" NPT (Standard). Materials Cylinder Body & Yoke: Aluminum with corrosion-resistant coating. Piston: Aluminum. Shaft & Hardware: Carbon Steel or Stainless Steel. Seals: Buna-N (Standard). Viton and others available. Accessories Compatible with Fisher field-mounted instrumentation like the 3570/3582 position transmitters, 1067 volume boosters, and limit switches.

Technical Specifications / Parameters Parameter Specification Model Fisher Type R232E Type Direct-Acting, Pressure Reducing Pilot Function Controls the outlet pressure of a main pilot-operated regulator. Sensed Pressure Downstream (Outlet) Pressure of the main regulator. Maximum Inlet Pressure (to Pilot) Up to 200 psig (13.8 bar) – This is the pressure available to load the main valve. Controlled Output Pressure The loading pressure sent to the main valve actuator, which is proportional to the sensed pressure. Set Pressure Range Varies with spring. Common ranges include 5" w.c. to 15 psig (12 mbar to 1 bar) and other subsets within a wider overall range. Supply Pressure Connection 1/4" NPT Output (Loading Pressure) Connection 1/4" NPT Sense Pressure Connection 1/4" NPT Diaphragm Material Butyl (standard for natural gas), other elastomers like EPDM or Nitrile available. Body Material Aluminum Spring Material Music Wire (standard, with corrosion-resistant coating). Temperature Range -20°F to +150°F (-29°C to +66°C) - standard elastomers.

Technical Specifications / Parameters Parameter Specification for P163A & P164 Model Fisher P163A (Atmospheric Vent), Fisher P164 (Vented) Type Direct-Acting, Spring-Loaded, Backpressure Pilot Function Controls the upstream pressure of a main pilot-operated backpressure regulator or relief valve. Sensed Pressure Upstream (Inlet) Pressure of the main regulator. Vent Configuration P163A: Vents to Atmosphere. P164: Vents to a separate, lower-pressure vent line. Maximum Inlet Pressure (to Pilot) Up to 400 psig (27.6 bar) for standard models. Set Pressure Range Varies with spring. Common ranges are available from very low pressures (inches of water) up to 400 psig. Supply Pressure Connection 1/4" NPT (This is the loading pressure from the main valve's relay). Sense Pressure Connection 1/4" NPT (Connected to the upstream process pressure). Vent Connection P163A: Typically has a vent screen or open port. P164: 1/4" NPT for connection to a vent header. Diaphragm Material Butyl (standard for natural gas), EPDM, Nitrile. Body Material Aluminum Spring Material Music Wire (standard, with corrosion-resistant coating). Temperature Range -20°F to +150°F (-29°C to +66°C) - standard elastomers.

Key Parameters Category Parameter Name Description & Typical Values Valve Specifications Valve Size 1" to 12" (DN 25 to DN 300) End Connections Flanged - ANSI Class 150 through 2500. RTJ (Ring Type Joint) is common for high-pressure services. Body Styles Globe (Standard), Angle (Excellent for severe erosive and cavitating services). Body Materials Carbon Steel (WCB) - Standard. Stainless Steel (CF8M/316), Alloy 20, Duplex Stainless Steel, Inconel. Pressure & Temperature Pressure Rating Up to ANSI Class 2500. Temperature Range Standard: -50°F to 450°F (-46°C to 232°C). Extended ranges from cryogenic to 1100°F (593°C) with special components. Internal Parts (Trim) Trim Design Cage-Guided, Balanced Plug - Standard. Trim Types Standard Trim, Multi-Stage Anti-Cavitation Trim (e.g., Whisper Trim III), Low-Noise Trim. Flow Characteristics Equal Percentage (Standard), Linear. Leakage Class Class II, III, or IV (metal-to-metal). Class IV, V, or VI (with optional soft seat). Trim Materials Stainless Steel (Standard), Hardened Stainless Steel (17-4PH), Stellite, Tungsten Carbide for extreme abrasion. Flow Capacity Flow Coefficient (Cv) Varies significantly by valve size and multi-stage trim design. Multi-stage trim inherently has a lower Cv than standard trim for the same valve size. Must be carefully calculated using Fisher sizing software. Actuator (Typical) Type Fisher 1051/1052 Size 60 or larger Piston Actuator is typical for high-thrust requirements. Large diaphragm actuators (e.g., Type 99) may be used for less demanding services.