Control Valve Positioner, 0-90°, 4-20 mA DC, 0 to 0.7 MPa

The China Control Valve Positioner Manufacturer offers a high-performance valve positioner designed for precise control. This positioner features an input signal range of 4-20 mA DC, ensuring compatibility with standard industrial control systems. It provides an angular stroke from 0 to 90°, making it suitable for a variety of valve applications. With an output pressure capability up to 0.7 MPa, it ensures reliable and efficient operation. This positioner is ideal for industries requiring accurate control and high performance in valve positioning systems.

Product Name: Control Valve Positioner
Input Signal: 4-20 mA DC
Input Impedance: 250 Ω ± 5%
Gas Source Pressure: 0.14 MPa to 0.7 MPa (140 kPa to 700 kPa)
Output Pressure: 0 to 0.7 MPa (0 to 700 kPa)
Angular Stroke: 0 to 90°
Air Consumption: at 50% output pressure

Based on their structure, valve positioners can be classified into pneumatic valve positioners, electro-pneumatic valve positioners, and intelligent valve positioners. They are essential accessories for control valves, typically used with pneumatic control valves. A valve positioner receives the output signal from a regulator and converts it into a corresponding output signal to control the pneumatic control valve. Through a feedback mechanism, the valve stem displacement is sent back to the positioner, which then transmits the valve position status to the upper control system via an electrical signal.

Technical Parameters

» Control type: Single-acting / Double-acting
» Input signal: 4–20 mA DC
» Input impedance: 250 Ω ± 5%
» Output characteristics: Proportional to input signal
» Supply air pressure: 0.14–0.7 MPa (140–700 kPa)
» Output pressure: 0–0.7 MPa (0–700 kPa)
» Angular stroke: 0–90°
» Air consumption at 50% output pressure:
• Single-acting: at 140 kPa → 5 Nl/min  
• Double-acting: at 400 kPa → 15 Nl/min  
» Maximum air consumption:
• Single-acting: at 140 kPa → 175 Nl/min  
• Double-acting: at 400 kPa → 400 Nl/min