Model T5220 Electro-Pneumatic Transducer from Rotork Fairchild

Rotork Fairchild Model T5220 Electro-Pneumatic TransducerAs a fast response, high flow I/P, E/P transducer, the T5220 has all the performance you want in a voice coil I/P transducer product, but it also includes a built-in booster section to deliver high flow capacity, up to 45 SCFM (76.5 m3/HR), with six available ranges to allow pressure multiplication to the output.

Operating Principles

The T5220 Transducer is an electro-pneumatic device that converts a DC current or voltage input signal to a proportional pneumatic output. This device is made up of three sections: the Signal Conversion Section, the Pneumatic Section, and the Booster Section. The Signal Conversion Section (PC Board) accepts a DC current or voltage. This signal is applied to a coil, which creates a magnetic force that moves a Flexure Arm. The Pneumatic Section operates as a force balance system. A Sapphire Ball floats inside a Nozzle and controls the output pressure by exhausting air supplied through an Orifice. This Sapphire Ball acts as a piston, exerting a force that is balanced against the force transferred to the Flexure Arm by the Coil. The Booster Section amplifies the output pressure of the transducer. At the set point, the force due to the transducer output pressure acting on the top of the Upper Diaphragm is balanced by the force due to booster output pressure acting on the underside of the Lower Diaphragm. Any imbalance results in the actuation of the appropriate supply valve or exhaust valve to correct the output pressure.

Features

Model T5220 Electro-Pneumatic Transducer Features

  • Fast response to input signal changes - results in faster loop control and savings in process materials
  • Integrated volume booster output - high flow for a higher capacity output signal or pressure
  • Six input signal ranges - meets most process and machine requirements
  • Negative bias option allows zero-pressure-based operation
  • Five booster ratios - meet industrial equipment requirements for higher output pressure ranges
  • Temperature compensation provides stable operation under environmental changes
  • Vibration resistance maintains set points under adverse vibration conditions
  • Various mounting configurations - allows installation flexibility for most applications
  • NEMA 3R or optional NEMA 4X enclosure - well-suited for outdoor and indoor installations
  • Conduit port - allows for convenient wiring

Specifications

Model T5220 Electro-Pneumatic Transducer Specifications

  • Supply Pressure: 20 + 2 psig, [1.5 + 0.15 BAR], (150 + 15 kPa)
  • Output Capacity (SCFM): 15 (25.5 m3/HR) Max. @ 20 psig, [1.5 BAR], (150 kPa)supply. 45 (76.5 m3/HR) @ 100 psig, [7.0 BAR], (700 kPa) (with separate supply.)
  • Exhaust Capacity (SCFM): 7 (11.9 m3/HR) downstream pressure @ 5 psig, [.35 BAR], (35 kPa) above 3 psig, [0.2 BAR], (20 kPa) set point. 14 (23.8 m3/HR) downstream pressure @ 5 psig, [.35 BAR], (35 kPa) above 15 psig, [1.0 BAR], (100 kPa) set point.
  • Air Consumption (SCFM): 0.28 (0.48 m3/HR) Max. (dead end) @ 20 psig, [1.5 BAR], (150 kPa) supply
  • Output Range (1:1 Ratio): 3-15 psig, [0.2-1.0 BAR], (20-100 kPa)
  • Supply Pressure Effect: + 0.3% of Span for a 1 psig, [0.07 BAR], (7 kPa) supply change between 18-22 psig, [1.2-14.5 BAR], (120-145 kPa).
  • Shock & Vibration Effect: Negligible up to 2 g's between 5 Hz and 200 Hz
  • Ambient Temperature: -40° F to +150° F, (-40° C to +65.5° C)
  • Temperature Coefficient: Less than 1% of Span / 50° F (10° C)
  • Materials of Construction
    • Body and Housing: Aluminum
    • Ball and Orifice: Sapphire, Brass
    • Nozzle: Stainless Steel

Dimensions

Model T5220 Electro-Pneumatic Transducer Dimensions

Rotork Fairchild Model T5220 Electro-Pneumatic Transducer

Q & A

Q&A Section with Expand/Collapse Icons

Model T5220 Electro-Pneumatic Transducer Q & A

+What does the T5220 do, and where is it typically used?
The T5220 converts a DC electrical signal into pneumatic output pressure. It is used in industrial process-control systems to operate actuators, valves, and other air-driven equipment that require precise, electrically controlled air pressure.
 
+What are the input and output signal ranges, and what are the pressure capabilities?
It accepts common control signals such as 4-20 mA or various DC voltage ranges and provides proportional pneumatic output. With its integrated booster, it can deliver significantly higher flow and output pressure than a standard I/P transducer, suitable for large or demanding pneumatic loads.
+Is the T5220 suitable for harsh industrial environments?
Yes. It is built with temperature compensation, vibration resistance, and NEMA-rated housings, making it reliable in environments that experience temperature changes, vibration, or outdoor exposure.
 
+How does the booster feature work, and when is it needed?
The booster amplifies the pneumatic output produced by the electrical-to-pressure conversion section, enabling the device to supply more air volume and higher pressure. It is especially beneficial when controlling large actuators or any system requiring high flow or fast pressure response.  
 
 
+Will the T5220 integrate with my existing control system?
In most cases, integration is straightforward because the T5220 supports standard industrial control signals, works with typical supply air pressures, and offers flexible mounting and wiring options. Verifying the actuator’s required operating pressure and flow is the most important step before ordering.
 


 

Downloads

Download Model T5220 Electro-Pneumatic I/P, E/P Transducer Datasheet

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