The SRI983 Positioner is designed to control pneumatic valve actuators from control systems and electrical controllers with electric control signals. It is used to reduce the adverse effects of valve friction,for higher thrust  and shorter positioning time. It offers an easy adjustment by two mechanical screws.

• Independent adjustment of stroke range and zero
• Adjustable amplification and damping
• Split range up to 3-fold possible
• Input Signal from 0 to 20 mA or 4 to 20 mA
• Supply pressure up to 6 bar (90 psig)
• Single or double acting
• Low vibration effect in all directions
• Mounting on linear actuators according to NAMUR:
  IEC 534 Part 6
  Stroke range 8 to 100 mm (0.3 to 4 in)
  (larger strokes on request)
• Mounting on rotary actuators acc. to VDI/VDE 3845 for rotation angles up to 120°
  • Angular range
    linear: 30° to 120°
    equal percentage: 90°; linear from 70°
• Protection class
• Pneumatic Unit IP54 or IP65
• Electrical Unit IP65 with ATEX and NEMA 4 with FM and CSA
• Explosion protection:
  II 2 G EEx d (flameproof) according to ATEX
  explosion proof according to FM and CSA
• Ambient temperature* –40 to 80°C (–40 to 176°F)
• EMC in accordance with the international standards and laws (CE)