Fisher 3720 Electro pneumatic Rotary Valve Positioner 4–20 mA
The Fisher 3720 Electropneumatic Valve Positioner is designed for accurate positioning and automatic control of rotary pneumatic valve actuators in industrial process systems.
- Single Acting or Double Acting Actuator Configuration
- 150 psi (10.3 bar), Subject to Actuator Rating Maximum Supply Pressure
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- Technical supportTalk to an engineer
- 1 YearWarranty
Product Overview
The Fisher 3720 Electropneumatic Valve Positioner is designed for accurate positioning and automatic control of rotary pneumatic valve actuators in industrial process systems. Manufactured by Fisher, an Emerson brand, this positioner converts a 4–20 mA DC electrical input into a proportional pneumatic signal, allowing compatible actuators to achieve the required valve position. Its mechanical feedback mechanism supports stable flow regulation, responsive valve movement, and reliable industrial operation.
Part of the Fisher 3700 Series, the 3720 combines a Fisher 3710 pneumatic positioner with a Fisher 3722 electropneumatic converter. It features spool valve technology, adjustable calibration, and compatibility with single-acting and double-acting rotary actuators. The positioner is suitable for oil and gas processing, chemical manufacturing, petroleum refining, power generation, water treatment, and industrial valve automation.
Technical Specifications
|
Specification |
Value |
|---|---|
|
Product Name |
Electropneumatic Rotary Valve Positioner |
|
Manufacturer / Brand |
Fisher / Emerson |
|
Model Number |
3720 |
|
Product Series |
Fisher 3700 |
|
Product Type |
Electropneumatic Valve Positioner |
|
Control Technology |
Electropneumatic Force-Balance |
|
Electrical Input |
4–20 mA DC |
|
Split-Range Input |
4–12 mA or 12–20 mA |
|
Communication |
Analogue, Without HART |
|
Electropneumatic Converter |
Fisher 3722 |
|
Converter Output |
3–15 psi (0.2–1.0 bar) |
|
Actuator Configuration |
Single Acting or Double Acting |
|
Actuator Compatibility |
Rotary Diaphragm and Piston Actuators |
|
Pneumatic Control |
Spool Valve |
|
Position Feedback |
Mechanical Cam and Feedback Lever |
|
Maximum Supply Pressure |
150 psi (10.3 bar), Subject to Actuator Rating |
|
Pneumatic Output |
Up to Available Supply Pressure |
|
Independent Linearity |
±1% of Output Span |
|
Hysteresis |
0.6% of Output Span |
|
Deadband |
0.35% of Input Span |
|
Calibration |
Adjustable Zero and Span |
|
Installation |
Actuator Mounted |
|
Operating Medium |
Clean, Dry Instrument Air |
|
Related Models |
3722, 3661, 3622, 3620J |
|
Condition |
New |
|
Warranty |
1 Year |
Key Features
Electropneumatic rotary valve positioning for accurate industrial control
Standard 4–20 mA DC electrical input
Integrated Fisher 3722 current-to-pressure converter
Compatible with single-acting and double-acting pneumatic actuators
Mechanical feedback system for reliable valve positioning
Spool valve technology for responsive actuator operation
Supports split-range control applications
Adjustable zero and span settings for calibration
Maximum supply pressure of 150 psi, subject to actuator limits
Suitable for industrial valve maintenance and replacement
Typical Applications
Industrial rotary control valve positioning
Oil and gas processing facilities
Chemical and petrochemical manufacturing plants
Petroleum refining installations
Power generation and utility systems
Water and wastewater treatment facilities
Industrial manufacturing automation
Rotary ball and butterfly valve control
Pneumatic actuator positioning systems
Industrial flow and pressure regulation
Shipping & Support
Fast dispatch – Australia & Worldwide Shipping
Technical assistance available
1-year warranty
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