Key Benefits and Advantages
Integrated I/P Conversion: The AV2 eliminates the need for external converters and additional piping. By housing the I/P module internally, the device is more resilient to environmental damage and signal loss, providing a streamlined “all-in-one” solution for modernizing legacy pneumatic systems.
High-Vibration Resistance: Engineered for the most demanding plant environments, the AV2 utilizes a balanced beam and pilot valve assembly that remains stable even under extreme mechanical vibration. This makes it an ideal choice for mounting on high-cycle valves or piping systems located near heavy rotating machinery.
Fast and Accurate Calibration: The AV2 is designed for rapid deployment. It features easily accessible, mechanical zero and span adjustments that can be tuned with standard hand tools. This “set-and-forget” calibration ensures that the valve remains at the precise setpoint with minimal drift over time.
Single or Double-Acting Versatility: Without requiring additional hardware, the AV2 can be configured to operate both single-acting (spring return) and double-acting (piston) actuators. This flexibility allows plants to standardize on a single positioner model across a wide range of valve types.
Explosion-Proof Options: For applications in hazardous areas, the AV2 is available with an explosion-proof I/P converter. This ensures safe operation in environments where flammable gases or vapors may be present, such as in refining or chemical processing.
Dynamic Response and High Capacity: The AV2 features a high-capacity pilot valve that provides rapid air delivery and exhaust. This results in superior responsiveness to large setpoint changes, while the high-gain design maintains the sensitivity required for precise, small-scale adjustments.
Technical Properties
Operation: Electro-pneumatic (I/P) positioner.
Input Signal: 4 to 20 mA DC (standard).
Actuator Type: Single-acting or Double-acting; Linear or Rotary.
Supply Pressure: Up to 145 psig (10 bar).
Output Characteristics: Choice of Linear, Square Root, or Equal Percentage cams.
Accuracy: Less than 0.5% of span.
Ambient Temperature: Standard range -40 to 82°C (-40 to 180°F).
Enclosure: NEMA 4X / IP65; Explosion-proof and Intrinsically Safe versions available.
Field of Application
The AV2 is the premier choice for facilities that require high-tier mechanical reliability with the precision of a 4-20 mA control loop.
Primary Industries and Uses:
-
Chemical & Petrochemical: Reliable valve control in highly corrosive and explosive atmospheres.
-
Power Generation: Accurate regulation of burner air dampers, fan vanes, and steam control valves.
-
Oil and Gas: Used in processing and midstream facilities where electronic control signals are the standard.
-
Pulp and Paper: Managing valve positions on sections of the paper machine prone to high vibration.
-
Water and Wastewater: Controlling large-scale flow and pressure regulators in distribution networks.
