Model 2000 Volume Boosters from Rotork Fairchild

Rotork Fairchild Model 2000 Volume BoosterThe Model 2000 Pneumatic Volume Booster converts a low-flow signal to a high-flow output. It is ideally suited for a variety of applications, including the operation of air systems that require rapid valve or cylinder action. With its balanced supply valve and aspirator tube, the M2000 booster will maintain setpoint while delivering a strong boost of volume.

Operating Principles

When signal pressure on the top of the Signal Diaphragm creates a downward force on the Diaphragm Assembly, the Supply Valve opens.

Output pressure flows through the Outlet Port and the Aspirator Tube to the Control Chamber to create an upward force on the bottom of the Control Diaphragm. When the setpoint is reached, the force of the signal pressure that acts on the top of the Signal Diaphragm balances with the force of the output pressure that acts on the bottom of the Control Diaphragm to close the Supply Valve.

When the output pressure increases above the signal pressure, the Diaphragm Assembly moves upward to close the
Supply Valve and open the Exhaust Valve. Because the Poppet Valve is closed, pressure flows down the Connecting Tube to the bottom of the Motor Diaphragm. This pressure keeps the Supply Valve tightly closed while in the exhaust mode. The Poppet Valve opens and excess output pressure exhausts through the vent in the
side of the unit until it reaches the setpoint.
 

Features

Model 2000 Volume Booster Features

  • Flow capacity of 40 SCFM (68 m3/HR), which results in a Cv factor of just less than 1.0 in forward flow mode - provides fast responsive operation
  • Balanced supply valve minimizes the effect of supply pressure variation
  • Aspirator tube design minimizes downstream pressure droop under flow conditions
  • Soft supply and exhaust valve seats provide high forward and exhaust flows
  • Small signal volume - assures rapid response to pressure variation
  • A separate control chamber isolates the diaphragm from the main flow and eliminates any hunting and buzzing
  • Unit construction allows you to service the unit without removing it from the line
  • No bleed soft seat design minimizes the air consumption of the system

Specifications

Model 2000 Volume Booster Specifications

  • Maximum Supply Pressure: 250 psig, [17.0 BAR], (1700 kPa)
  • Flow Capacity (SCFM): 40 (68 m3/HR) @ 100 psig, [7.0 BAR], (700 kPa) supply & 20 psig, [1.5 BAR], (150 kPa) setpoint
  • Exhaust Capacity (SCFM): 16 (27.2 m3/HR) where downstream pressure is 5 psig,[.35 BAR], (35 kPa) above 20 psig, 1.5 BAR], (150 kPa) setpoint
  • Maximum Signal or Output Pressure: 150 psig, [10.0 BAR], (1000 kPa)
  • Supply Pressure Effect: Less than 0.1 psig, [.007 BAR], (.7 kPa) for 100 psig, [7.0 BAR], (700 kPa) change in supply pressure
  • Sensitivity: Less than 1” (2.54 cm) Water Column
  • Ambient Temperature: -40° F to +200°F, (-40° C to +93° C)
  • Materials of Construction:
    • Body and Housing: Zinc
    • Diaphragms: Nitrile on Dacron

Dimensions

Model 2000 Volume Booster Dimensions

Rotork Fairchild Model 2000 Volume Booster Outline Dimensions


 

Q & A

Q&A Section with Expand/Collapse Icons

Model 2000 Volume Booster Q & A

+ What flow capacity and pressure ratings does the Fairchild Model 2000 support?
The Fairchild Model 2000 delivers a flow capacity of about 40 SCFM (≈68 m3/h) and operates with a maximum supply pressure up to 250 psig (17 bar). Its standard signal/output range reaches around 150 psig (10 bar), with available port sizes of ?″ or ?″ NPT/BSPT. These ratings make it ideal for systems requiring fast, stable air response. Matching your system’s supply pressure and actuator demand ensures optimal performance and avoids pressure loss.
 
+How do I choose the correct size, ratio, and connection type for my application?
When selecting a Model 2000, consider port size, thread type, and output ratio. The unit is available in ?″ or ?″ ports, with either NPT (common in North America) or BSPT (common in Europe) threads. Most configurations reproduce the input signal in a 1:1 ratio, though a 1:1.6 option exists for higher output. Choosing the correct version based on your piping standards and control ratio ensures compatibility and performance efficiency.
+ What installation and maintenance requirements should I know about?
The booster should be installed in clean, dry, oil-free air systems using proper filtration to prevent contamination. It can be serviced in-line without removal, simplifying maintenance. Regular checks of the exhaust vents, diaphragms, and valve seats help maintain accuracy and responsiveness. Correct orientation, full-size fittings, and compliance with local standards (e.g., ISO or CE) support reliable operation in North American and European environments.
 
+ What are typical applications, and how does the Model 2000 improve valve or actuator performance?
The Model 2000 is commonly used in process control systems where rapid pneumatic response is essential, such as large valve actuators and cylinders. It converts a low-flow control signal into a high-flow output, ensuring faster movement and more stable control. By reducing lag and pressure droop, it enhances the accuracy and speed of pneumatic systems in industries like oil & gas, chemical processing, and manufacturing automation.  
 
 
+ How do supply pressure variations and downstream conditions affect performance?
The Model 2000 maintains steady output even under supply pressure fluctuations, with less than 0.1 psig variation for a 100 psig change in supply. Its aspirator tube design helps prevent downstream pressure droop during flow. System performance still depends on piping size, actuator demand, and air quality. Ensuring adequate supply and properly sized downstream components will help sustain consistent speed and control response.
 


 

Downloads

Download Rotork Fairchild Model 2000 Volume Booster Datasheet

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