Overview
The Fisher Controls Type 582i is an electro-pneumatic converter designed to provide proportional pneumatic output signals from DC current input. The 582i converter receives the DC current input signal and, through a nozzle/flapper arrangement, provides a proportional pneumatic output signal. This pneumatic output signal provides the input signal to the pneumatic valve positioner, eliminating the need for a remote-mounted transducer. The 582i is widely used in process control applications requiring precision valve actuation in industrial and chemical processing environments.
Key Features
- Integral I/P (current-to-pneumatic) converter module eliminates external transducers
- Force-balanced beam system with nozzle/flapper mechanism for precise signal conversion
- Compatible with standard DC current input signals
- Adjustable zero and span for flexible signal range configuration
- Minimal sensitivity to supply pressure and valve load variations
- Multiple certification options (ATEX, CSA, FM, IECEx) for hazardous area applications
Technical Specifications
- Input Signal: DC current, 20 mA maximum
- Supply Voltage: 30 Vdc maximum
- Operating Temperature Range: -40°C to 71°C
- Signal Conversion: Nozzle/flapper arrangement with integral I/P module
- Beam Type: Force-balanced
- Enclosure Rating: IP54 (standard); ATEX/CSA options available
- Output: Proportional pneumatic pressure
Typical Applications
The Fisher 582i is used in:
- Process control systems requiring proportional valve actuation
- Flow and pressure regulation in chemical and petrochemical plants
- Temperature and level control loops with pneumatic valve trim
- Steam system control and modulating control valve applications
- HVAC and utility system automation
- Hazardous area installations with appropriate certification ratings
Compatibility & Replacements
Compatible With
- Fisher 3582 and 3582i pneumatic valve positioner family
- Diaphragm-actuated sliding-stem control valve assemblies
- Standard pneumatic actuator systems
- DC current loop control systems (4-20 mA)
- Process control DCS and instrumentation networks
- Pneumatic supply systems (3 to 10 bar typical)
Replaces / Drop-In Replacement For
- Earlier Fisher 582 pneumatic converter models (with compatibility verification)
- Other electro-pneumatic converters in similar pressure/flow range
Works With
- Fisher Controls instrumentation software and configuration tools
- Standard 4-20 mA process control loop equipment
- Pneumatic control systems and valve positioner packages
- Third-party valve diagnostic systems (FlowScanner compatible mounting)
