AZBIL CORPORATION AVP300-VSD2A VALVE POSITIONER R-AD4AG-41-021 4-20 MADC #2

The Azbil AVP300-VSD2A is a member of the industry-leading Smart Valve Positioner 300 Series, engineered to deliver exceptional control accuracy, simplified commissioning, and reduced maintenance overhead for pneumatic control valves. Designed by Azbil Corporation (formerly Yamatake), a global pioneer in industrial automation, this positioner combines robust construction with intelligent diagnostic capabilities to optimize valve performance across a wide spectrum of process industries.

Key Features & Benefits

Universal Compatibility
Unlike proprietary systems, the AVP300 Series is designed to mount seamlessly on control valves from virtually any global manufacturer. Whether you operate Fisher, Samson, Masoneilan, or Azbil actuators, a single positioner model can be configured to match your valve assembly, eliminating the need to stock multiple spares for different valve brands.

Effortless Auto-Setup & Calibration
Commissioning is drastically simplified through Azbil's built-in auto-setup function. Using an external switch accessible without removing the cover, technicians can initiate a fully automatic configuration sequence that scans the actuator, determines zero and span, and optimizes control parameters—often in under 90 seconds. This feature reduces downtime and allows precise adjustments even in hazardous areas using only a screwdriver.

Advanced Valve Diagnostics
The AVP300-VSD2A incorporates diagnostic parameters that provide early detection of control valve abnormalities, including stick-slip, total travel, cycle counts, and travel histograms (when used with HART communication or Azbil's Valstaff maintenance support system). This predictive capability enables maintenance teams to transition from reactive repairs to proactive planning, minimizing unplanned process interruptions.

Forced Full-Close Function
Azbil's unique forced full-close function ensures tight shut-off without shifting the zero point calibration. When the input signal falls below a user-defined threshold, the positioner drives the valve to a completely closed position, enhancing seat tightness and process safety.

Technical Specifications

ParameterSpecification
ModelAVP300-VSD2A
Input Signal4–20 mA DC 
Minimum Operating Current3.84 mA
Stroke Range14.3–100 mm linear; up to 90° rotary
Air Supply Pressure140–700 kPa (1.4–7.0 kgf/cm²)
Air Consumption≤ 4–6 L/min (N) typical, depending on supply pressure
Ambient Temperature-40 to +80°C (standard models)
Input Impedance~300 Ω at 20 mA (weatherproof/flameproof versions)
Enclosure RatingNEMA 4 / IEC IP66 equivalent
Housing MaterialDie-cast aluminum
WeightApproximately 2.5 kg (single-acting, without filter regulator)
CommunicationSFN communication (AVP300/301/302); HART available on AVP302 variants
Valve Travel OutputOptional 4–20 mA DC position transmitter (AVP301/AVP307)

Applications

The AVP300-VSD2A is suitable for precise control of both single-acting and double-acting pneumatic actuators, including linear diaphragm, linear cylinder, and rotary cylinder types. Its robust design and wide temperature tolerance make it ideal for:

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