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As of 2014, Thomas Linear motors were a thing of the past. But now they have hit the market with what consumers consider to be the BEST linear motor on the market, as of 2015. The past few years Thomas Linear, alongside Gardner Denver, has developed cutting edge technology in the linear industry. As the leader in providing fluidic solutions to Original Equipment Manufacturers (OEM), Thomas continues to develop new products to meet the requirements of evolving markets and applications. Matching the competitors Flow Rate for air pressure, they have packed it all in a small, quiet, lower power consumption motor that is sure to impress. This new design, an oil-less linear diaphragm compressor, has quiet operation, lower pulsation, higher efficiency and fewer wearing parts. Thomas also offers a two (2) year warranty on all linear replacement motors.The Thomas Green AP-40A can be used as a compatible replacement on some 500 GPD aerobic treatment systems. The AP-40A replaces the Thomas 5040A, Thomas LP-40, HiBlow HP-40, Secoh SLL-40, and many more 40LPM.

This Thomas Green AP-40A comes with a pre-installed audible alarm on the side, eliminating the need for an external alarm and pressure switch.

For applications requiring extremely quiet, highly efficient operation, and simple maintenance - Thomas Linear pumps have found widespread use in the medical, industrial, chemical, environmental, and scientific industries. Performance ranges from .39 to 8.9 cfm (11 to 252 lpm), pressures to 10.5 psig (0.72 bar), vacuum levels to 12.1 in. Hg (603 mbar), with an operating noise level as low as 28 dB(a).

Operation is based upon the principles of electromagnetic oscillation – eliminating the need for sliding parts, minimizing power consumption, and offering high efficiency. Because there are no sliding parts there is no need for lubrication – the exhausted air is always clean and particle-free.

  • Blood Cuff Monitors
  • Waste Water Treatment
  • Environmental Monitoring and Air Sampling
  • Oxygen Supply for Medical Instruments
  • Liquid Agitation and Mixing
  • Hospital Air Mattresses
  • Medical Nebulizers
  • Air Supply for Leak Test Equipment
  • Solder Removal
  • Automotive Emission Test Equipment
  • Leak Test Equipment
  • Scientific and Medical Analysis Equipment

  • Rated Pressure12
  • Flow Rate43
  • Power Consumption29
  • Noise Level34
  • Weight4.3

AP-40A  120 Volts; 60 Hertz; Single Phase


  1. Oil-less
  2. Long Life
  3. Low Noise Level
  4. High Efficiency
  5. Compact and Powerful
  6. No Lubrication Necessary
  7. Smooth Air Flow
  8. Simple Maintenance


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