Key Parameters & Specifications
Parameter / Feature Category Description
Product Name Fisher™ 461 Series Pneumatic Force-Balance Indicator / Transmitter
Type Pneumatic Force-Balance Transmitter & Local Indicator
Primary Function To provide a local visual indication of a process variable (pressure, level) and/or transmit a proportional pneumatic signal to a control room.
Input (Process) Pressure: Various ranges, commonly from 0-30" H₂O (0-7.5 kPa) up to 0-800 psig (0-55 bar).
Level: For liquid level applications, using the hydrostatic head pressure.
Output Signal Standard Pneumatic Signal: 3-15 psig (0.2-1.0 bar).
Supply Pressure Standard: A clean, regulated air supply of 20 psig (1.4 bar) is typical. Must be higher than the output signal (e.g., >18 psig).
Accuracy Typically ±0.5% of span for the indicating scale.
Scale Large, easy-to-read dial. Can be calibrated in various engineering units (psi, kPa, inches of water, % level, etc.).
Operation Two-Wire Pneumatic System: A single supply air line powers the device, and the output signal is superimposed on this supply, varying between 3 and 15 psig.
Mounting Direct mounting to a process connection (e.g., a tank nozzle or pipe tap) or to a manifold.
Enclosure Rugged, weather-resistant aluminum case with a glass or plastic window.
Key Models & Versions
• 461: General purpose indicator/transmitter.
• 461L: Specifically designed for liquid level measurement.
• 461R: Functions as a receiver to display a remote 3-15 psi signal locally.
Key Parameters & Specifications
Parameter / Feature Category Description
Product Name Fisher™ 3720 Series Pneumatic Valve Positioner
Type Force-Balance, Pneumatic (I/P), Cam and Lever
Primary Application Positioning of rotary valves (ball, butterfly, plug) with piston actuators.
Input Signal Standard: 3-15 psig (0.2-1.0 bar). Other input ranges are available.
Supply Pressure Up to 150 psig (10.3 bar). Must be sufficient to meet the actuator's pressure requirements.
Output to Actuator Supply pressure dependent. Provides controlled air pressure to one or both sides of the piston actuator.
Action Field-reversible between direct and reverse action.
Feedback Mechanism Cam and Lever. The cam profile is designed to linearize the relationship between the input signal and the valve's rotational travel.
Flow Capacity (Relay) High-capacity relay for fast filling and exhausting of piston actuators, ensuring quick valve response.
Mounting Direct-mounted to the actuator. Connects to the valve shaft via a feedback lever and link.
Enclosure Weatherproof and corrosion-resistant aluminum enclosure.
Actuator Compatibility Piston Actuators:
• Double-acting
• Single-acting (spring-return)
Approvals Suitable for use in hazardous areas due to its purely pneumatic design. Can have specific certifications like FM, CSA, ATEX, etc.
Key Parameters & Specifications
Parameter / Feature Category Description
Product Name Fisher™ DST-G Digital Sliding Gate™ Control Valve Assembly
Type Integral Assembly of a rotary-shaft control valve body, Sliding Gate trim, and a digital valve positioner.
Primary Function High-performance throttling control with integrated digital diagnostics and configuration.
Trim Technology Sliding Gate™ Trim: A non-rotating stem moves a ported disc across a fixed seat. This design minimizes friction and wear.
Actuator & Positioner Actuator: Spring-and-diaphragm or piston actuator.
Positioner: Typically integrated with a Fisher FIELDVUE® (e.g., DVC6000 or DVC2000) Digital Valve Controller as a standard feature.
Communication & Protocol HART®, FOUNDATION™ Fieldbus, or Profibus PA (depending on the DVC version ordered).
Flow Characteristics Equal Percentage is standard. Linear characteristic is available.
Valve Body Styles Fisher Vee-Ball® (most common for DST-G), Fisher easy-e® Control Valve, or Fisher GX Control Valve.
Size Range (Vee-Ball) Typically 1 to 12 inches (DN 25 to DN 300).
Pressure Rating (ANSI) Class 150 through Class 600.
Leakage Class ANSI Class IV (standard metal-seated). ANSI Class VI (soft-seated) is available for bubble-tight shut-off.
Temperature Range Standard: -50°F to 450°F (-46°C to 232°C). Extended temperature ranges are available with special components.
Key Features
• High Capacity: High Cv for a given valve size.
• Low Fugitive Emissions: Packing system designed for low emissions.
• Smart Diagnostics: Built-in diagnostics via the FIELDVUE positioner (e.g., travel, pressure, step-response tests).
• Stable Control: Non-rotating guide design provides exceptional stability, reducing deadband and hysteresis.
Key Parameters & Specifications
Parameter / Feature Category Description
Product Name Fisher™ FIELDVUE™ DVC6200p Digital Valve Controller
Type Digital / Electro-Pneumatic Positioner (Smart)
Primary Function To precisely position a control valve based on a control signal and provide advanced diagnostics and device information.
Input Signal Analog: 4-20 mA DC, with HART 7 digital signal superimposed.
Supply Pressure Up to 150 psig (10.3 bar).
Output Pressure (to Actuator) Two Outputs: Independently controls two output pressures, making it ideal for double-acting piston actuators. Also supports single-acting piston and diaphragm actuators.
Air Delivery Capacity High capacity for fast stroking of piston actuators. Typical volume gain: > 5.5 scfm (156 slpm).
Communication Protocol HART 7 (4-20 mA with digital overlay). FOUNDATION™ Fieldbus and Profibus PA versions are available as separate models (DVC6200f & DVC6200pd).
Pressure Sensors Integrated Sensors for monitoring supply pressure (S), and two output pressures (O1 and O2).
Enclosure Rating NEMA 4X (IP66/67) for weather and water resistance. Certified for use in Hazardous Areas.
Diagnostic Functions
• Partial Stroke Test (PST)
• Valve Performance Quick Check
• Step Response Test
• Travel & Pressure Trend
• Friction & Deadband Analysis
Actuator Compatibility
• Double-Acting Piston (Primary)
• Single-Acting Piston (Spring-Return)
• Spring-and-Diaphragm
Parameters & Specifications
Parameter / Feature Category Description
Product Name Fisher™ D4 Easy-E™ Control Valve
Type Top-Entry, Sliding Stem, Cage-Guided Globe Valve
Primary Function Throttling (Modulating) Control for process fluids.
Body Styles Globe Body: Straight-through flow pattern. Angle Body also available.
Size Range (ANSI) ½ inch to 4 inches (DN 15 to DN 100)
Pressure Rating (ANSI) Class 150, 300, 600
End Connections Flanged (Standard), Screwed, or Socket Weld
Trim Cage-Guided, Non-Rotating Plug. A variety of trim trims are available (e.g., characterized cage, reduced trim, noise attenuation trim, anti-cavitation trim).
Leakage Class ANSI Class IV (standard metal seat). ANSI Class VI (bubble-tight shut-off) is available with soft seat.
Flow Characteristics Equal Percentage (Standard), Linear, Quick Opening (via characterized cage).
Temperature Range Standard: -350°F to 450°F (-212°C to 232°C). Extended ranges available with special materials and seals.
Actuator Compatibility Designed to be paired with Fisher pneumatic actuators (e.g., 657 or 667 diaphragm actuators) and a positioner (e.g., a FIELDVUE DVC or a pneumatic 3582).
Key Parameters & Specifications
Parameter / Feature Category Description
Product Name Fisher™ Yarway™ AT-37 / AT-47 Pneumatic Actuator
Type Rack and Pinion, Quarter-Turn Pneumatic Actuator
Primary Function To provide rotary torque for operating quarter-turn valves (ball, butterfly, plug).
Actuator Type Double-Acting or Spring-Return (Fail-Safe).
Supply Pressure Range Typically 40 to 120 psig (2.8 to 8.3 bar).
Torque Output Varies with supply pressure. The AT-47 provides higher torque than the AT-37 at the same supply pressure. (Exact torque values in lb-in or Nm depend on the specific model and must be obtained from the data sheet).
Standard Rotation 90° quarter-turn.
Mounting Direct mounting to valves with ISO 5211 mounting pads. Can be fitted with a variety of mounting kits for specific valve brands.
Position Indication Mechanical travel indicator (visual pointer) to show valve position (Open/Closed).
Accessory Ports Prepared for the installation of accessories such as:
Limit Switches (e.g., for position feedback)
Solenoid Valves (for on/off pneumatic control)
Positioners (e.g., Fisher 3720 for proportional control) |
| Materials | Body: Aluminum or ductile iron. Internal Parts: Stainless steel and other corrosion-resistant materials. |
| Temperature Range | Standard: -4°F to 180°F (-20°C to 82°C). Higher temperatures possible with special seals. |
Key Parameters & Specifications
Parameter / Feature Category Description
Product Name Fisher™ 3582 Pneumatic Valve Positioner
Type Force-Balance, Cam and Lever, Pneumatic (I/P)
Primary Application Positioning of rotary valves (ball, butterfly, plug) with piston actuators.
Input Signal Standard: 3-15 psig (0.2-1.0 bar). Other input ranges (e.g., 6-30 psig) are available.
Supply Pressure Up to 150 psig (10.3 bar).
Output to Actuator Supply pressure dependent. Controls air to one or both sides of a piston actuator.
Air Flow Capacity Very High. The large-volume relay is designed to quickly fill and exhaust the chambers of piston actuators. Typical exhaust capacity is >3.0 SCFM (85 slpm).
Action Field-reversible between direct and reverse action.
Feedback Mechanism Cam and Lever. Standard cams provide Linear or Equal Percentage flow characteristics.
Actuator Compatibility Piston Actuators:
• Double-acting (Primary use)
• Single-acting (Spring-return)
Mounting Direct-mounted to the actuator. Connects to the valve shaft via a feedback lever and link.
Enclosure Weatherproof and corrosion-resistant aluminum enclosure.
Approvals Suitable for use in hazardous areas due to its purely pneumatic design. Typically has FM, CSA, and ATEX certifications.
Key Parameters & Specifications
Parameter / Feature Category Description
Product Name Fisher™ easy-e™ EW Control Valve
Type Top-Entry, Sliding Stem, Post-Guided Globe Valve
Primary Function Throttling (Modulating) Control for general-purpose process applications.
Body Styles Globe Body: Straight-through flow pattern. Angle Body also available.
Size Range (ANSI) ½ inch to 2 inches (DN 15 to DN 50)
Pressure Rating (ANSI) Class 150, 300
End Connections Flanged (Standard), Screwed, or Socket Weld
Trim Post-Guided Plug. The plug is stabilized by a single guide post (bushing). Simpler than a cage-guided design.
Leakage Class ANSI Class IV (standard metal seat). ANSI Class VI (bubble-tight shut-off) is available with a soft seat.
Flow Characteristics Equal Percentage or Linear (determined by the contour of the plug).
Temperature Range Standard: -20°F to 450°F (-29°C to 232°C). Extended ranges available with special materials.
Actuator Compatibility Designed to be paired with Fisher pneumatic actuators (e.g., 657 or 667 diaphragm actuators) and a positioner (e.g., a FIELDVUE DVC or a pneumatic 3582).
Key Parameters & Specifications
Parameter / Feature Category Description
Product Name Fisher™ Baumann™ 81000 Series Pneumatic Actuator
Type Spring-and-Diaphragm, Rotary Actuator (scotch yoke design)
Primary Function To provide rotary torque for operating quarter-turn valves (ball, butterfly, plug).
Actuator Type Double-Acting or Spring-Return (Fail-Safe).
Housing Material Glass-Reinforced Polyamide (Plastic - Type 6.6 G). Corrosion-resistant and lightweight.
Supply Pressure Range Typically up to 115 psig (8 bar).
Torque Output Varies by size and supply pressure. The series includes multiple frame sizes (e.g., 81100, 81200, 81300, 81400) with increasing torque output. (Exact torque values in lb-in or Nm must be obtained from the specific size's data sheet).
Standard Rotation 90° quarter-turn.
Temperature Range -4°F to 180°F (-20°C to 82°C).
Mounting Designed to mount to valves with ISO 5211 mounting pads. A variety of mounting kits are available for different valve brands and sizes.
Key Parameters & Specifications
Parameter / Feature Category Description
Product Name Fisher™ Vee-Ball™ V150 Control Valve
Type Rotary Shaft, V-Port Ball Valve
Primary Function Throttling and On/Off control of slurries, viscous fluids, and other challenging media.
Size Range 3 inches to 16 inches (DN 80 to DN 400)
Pressure Rating (ANSI) Class 150
End Connections Flanged (Standard: ANSI Class 150 RF). Wafer-style is also available for compact installation.
Trim (Ball) Characterized V-Port Ball. The V-notch provides a precise flow characteristic and shearing action.
Flow Characteristic Equal Percentage (inherent from the V-port shape).
Leakage Class ANSI Class VI (Bubble-tight) with soft seats (V150S). ANSI Class IV with metal seats.
Temperature Range With Soft Seats (V150S): Typically up to 400°F (204°C).
With Metal Seats: Up to 1000°F (538°C).
Actuator Compatibility Designed to be paired with piston actuators (e.g., Fisher 1061) or spring-diaphragm rotary actuators for automatic control. Typically equipped with a positioner like the Fisher 3582 or a FIELDVUE DVC.