PNEUMATIC POSITIONER

Description

Rugged aluminum die cast housing has superior anti-corrosion surface  treatment and an easy read visual valve position indicator. Visual valve  position indicator located on the top of the positioner. Gauges provided  for pressure monitoring. These positioners direct mount to rotary type  air actuators with the standard VDI / VDE-3845 Namur style top shaft  mounting. Universal Namur painted steel mounting bracket kit is included  with each positioner.

Features

• Valve positioners for 4-20mA or 3-15 PSI input
• Rugged aluminum housing with anti-corrosion protection
• Linearity +/- 1.5 %
• Rotation 90º clockwise or counter-clockwise
• Direct drive output shaft—no linkages
• Stainless steel gauge(s)
• Visual valve position indicator
• Universal Namur mounting bracket included

Applications

Pneumatic positioners are used with rotary air actuators to accurately  position control valves used in throttling applications. Convalve positioners offer fast and accurate control of ball valves, butterfly valves and  other type valves. Suitable for use with Convalve double acting or spring  return air actuated valves, as well as most other brands utilizing the  standard Namur mount.

Operation

Pneumatic positioners convert either a 4-20mA or 3-15 PSI input control  signal to a proportional pneumatic output. This output is fed to an air  actuator which in turn controls the valve position and flow (combined  with mechanical position feedback). Fast and accurate response times  from input change to valve movement. Easily adjustable zero and span if  required. Positioner can be setup to rotate output shaft clockwise or  counter-clockwise 90 degrees. Easily convertible from spring return to  double acting or vice  versa.

Accessories

Filter/Regulators – Used to filter the incoming air  and  set/maintain a   constant inlet pressure.