Electro-Pneumatic Positioners Series FC700

Integrated Characteristics
• Suitable for Rotary / Linear Actuators.
• Low Air Consumption
• No resonance at 5~200Hz.
• Prevents hunting by using Orifice for small size actuator.
• Simple Conversion to Direct Acting or Reverse Acting
• Precise Calibration with simple SPAN and Zero Adjustments.
• Suitable for Single/Double acting Actuators.
• Can control ½ split range with simple operation without replacing any parts
• Extremely Vibration Resistance Design.
• Easy Maintenance.
• Corrosion-Resistance Aluminium Die cast Body.
• Options available : Position Transmitter (4-20mA DC).
Two limit Switches. (2 NO + 2 NC)


Positioner Type Electro Pneumatic
Type Positioners
Temperature Min: -20 C ( -4 F )
Max: 120 C ( 248 F )
Motion Linear Motion , Rotary - 1/4 turn (90°)
Acting Double-Acting , Single-Acting
Protection Classes Explosion Proof , IP65 , IP66
Stroke Min: 0 inch ( mm )
Max: 6 inch ( 150 mm )
Country USA

Key features/benefits

The FLUCON Series FC703/704 Electro-Pneumatic Positioners
are used as final controlling element for operation of pneumatic
Rotary/linear valve actuators in correspondence with an input
signal of 4-20 mA DC or split ranges. The Positioners are based
on a force balance design for control application that requires a
high degree of reliability and repeatability at an economical
cost. The Positioners can handle the supply pressure up to 100
psig for higher pressure industrial pneumatic and process
control system requirements.


The Flucon 703/704FC Positioners converts pneumatic/electrical signal to a pneumatic output which can be used to operate the following:

Valve, Valve-Actuators
Damper and Louver Actuators
Web Tensioners and Brake

Principle of Operation

The operation of FLUCON 703/704 FC Series E/P Positioners are based on a force balanced system. Tension on the feedback spring provides feedback to the positioner which will vary as the actuator shaft rotates with cam. The spring loading force is applied through the cam shaft S cam to the positioner’s instrument signal capsule through the balance beam.

Input of 4~20mA DC is applied to the instrument and corresponding output is applied to the control capsule serving as force balance membrane and matching the actuator shaft position to the instrument signal.

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