Overview
The ABB AV3321000 I/P positioner is a Type AV3 characterizable pneumatic positioner designed for proportional control of pneumatic actuators and control valves. As an electro-pneumatic converter, it accepts a 4–20 mA electrical input signal and converts it to proportional pneumatic output, enabling precise positioning of linear or rotary actuators across industrial process control applications. This used unit offers reliable performance for retrofit and replacement installations.
Key Features
- Electro-pneumatic (I/P) design with 4–20 mA signal input compatibility
- Integrated position transmitter for feedback control and monitoring
- Characterizable output with zero, span, and gain adjustments for application-specific tuning
- Adjustable speed control orifices for response time optimization
- Compact, durable construction suitable for plant floor and control panel mounting
- Field-proven Type AV3 platform compatible with standard pneumatic mounting kits
Technical Specifications
- Product Type: Electro-pneumatic I/P Positioner (Type AV3)
- Input Signal: 4–20 mA DC
- Signal Supply Current: Maximum 50 mA
- Position Feedback: 4–20 mA transmitter output (integrated)
- Supply Air Pressure: 3–8.6 bar (45–125 psig)
- Output Air Range: 0–6 bar (0–90 psig) nominal
- Operating Temperature Range: −25 to +40°C (−13 to +104°F) standard operation
- Dew Point Requirement: Supply air dew point must be ≥7.7°C (≥18°F) below lowest operating temperature for reliable low-temperature performance
- Output Flow Capacity: Dependent on mounted actuator size and speed adjustment settings (see manufacturer tables)
- Mounting: Standard ABB mounting kit compatible (kit number 5327321__ dependent on valve stem size)
- Condition: Used, tested and functional
Typical Applications
The ABB AV3321000 is widely used in:
- HVAC systems requiring proportional valve control
- Power plant feedwater and steam control loops
- Process control systems with process transmitter feedback
- Retrofit installations replacing worn or obsolete positioners
- Flow, pressure, and temperature control circuits requiring fast response
- Hazardous location installations (Groups A, B, C, D approval available)
Compatibility & Replacements
The AV3321000 belongs to ABB’s Type AV pneumatic positioner family. Related models in the series include the AV1 and AV2 positioners for simpler applications, and the AV4 for high-capacity applications. Cross-reference with:
- ABB AV2321000 (lower-capacity variant)
- ABB AV2321030 (alternative configuration)
- ABB AV1221000 (mechanical feedback version)
Mounting kit compatibility is dependent on valve stem diameter; consult ABB accessory tables or contact your distributor for the correct kit assembly. Original ABB instruction manuals and full specifications are available from ABB’s technical library.
