Technical Specifications / Parameters
Parameter Specification / Description
Product Name Fisher enhanced ENVIRO-SEAL System
Type Fugitive Emissions Containment System for Valve Stems
Compatible Valves Fisher easy-e® globe valves (e.g., GX, HP, ET), rotary valves (Vee-Ball®, V100, V500), and many other globe and rotary designs.
Pressure Rating Matches the pressure rating of the parent control valve body (e.g., ANSI Class 150 through 2500).
Temperature Range Standard: -50°F to +450°F (-46°C to +232°C)
High-Temp: Options available for services up to +800°F (+427°C).
Emissions Performance Certified to meet < 100 ppmv methane when tested according to US EPA Method 21. Capable of achieving near-zero emissions.
Connection Port 1/4" NPT female, standard for purge/sniff connection and monitoring.
Primary Packing Material Typically a combination of flexible graphite (for high temp) and reinforced flexible graphite or PTFE (for corrosion/chemical resistance).
Secondary Seal Material Flexible Graphite, Grafoil®, or PTFE-based materials.
Body & Hardware Materials Carbon Steel (standard for hardware), Stainless Steel (for the seal housing and bolts).
Technical Specifications / Parameters
Parameter Specification
Model Fisher LS200
Type Electromechanical Limit Switch Box for Quarter-Turn Actuators
Enclosure Rating Standard: NEMA 4, 4X, 7, 9; CSA C22.2 No. 30; FM Approved for Class I, Division 1 & 2, Groups B, C, D; Class II, Division 1 & 2, Groups E, F, G.
Housing Material Cast Aluminum (standard, with corrosion-resistant finish).
Shaft Rotation Standard 90° rotation for quarter-turn valves. Other angles available.
Electrical Conduit Entry Two ½" NPT conduit entries.
Switch Types Electromechanical: Up to 4 snap-action switches (e.g., SPDT, DPDT).
Solid-State (Proximity): Up to 4 inductive or magnetic proximity switches.
Electrical Ratings (Snap Switch) Typically 10A @ 125/250 VAC; 15A @ 120 VAC; 0.4A @ 125 VDC. (Confirm with specific switch data).
Ambient Temperature Range Standard: -40°F to +165°F (-40°C to +74°C).
High-Temp Options: Available for higher temperatures.
Seals Buna-N (standard). Viton and EPDM available as options.
Window Material Polycarbonate.
Mounting Split-clamp design for easy mounting to valve stems.
Technical Specifications / Parameters
Parameter Specification
Model Fisher easy-Drive 200R (PROFIBUS PA)
Type Digital, Electric, Motor-Driven Positioner for Rotary Valves
Mounting Direct mounting on rotary actuators following VD/VDE 3845 (NAMUR) standard.
Fieldbus Protocol PROFIBUS PA per IEC 61158-2 and IEC 61784-1, supporting Profile 3.02.
Supply Pressure (Air Supply) 19 to 100 psig (1.3 to 7.0 bar)
Output Pressure Equal to supply pressure (A Single-outlet design that pressures and exhausts one actuator chamber).
Air Consumption Steady State: < 0.001 SCFM (< 0.02 NLPM)
During Stroking: Varies with speed and actuator size.
Air Flow Capacity (Cg) 0.45
Ambient Temperature Range -40°F to +185°F (-40°C to +85°C)
Position Sensing Technology Non-contact, magneto-resistive.
Enclosure Rating IP66/67 (NEMA 4X)
Hazardous Area Approvals ATEX, IECEx, FM/CSA for Intrinsically Safe (IS) and Non-incendive (NI) applications.
Materials Housing: Aluminum (Polyamide for IS versions); Sensing Shaft: Stainless Steel.
Diagnostics Valve signature, step response, travel and pressure trends, performance alerts.
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.