Linear piston pumps are suitable for not chemical aggressive or explosive gases. Our air compressors and vacuum pumps are unique products featuring a Linear-motor-driven Free Piston System. Nitto Kohki has made available a complete series of air compressors and vacuum pumps that incorporate this revolutionary mechanism. These are quite appropriate as air sources or vacuum units for various pneumatically operated equipment and apparatus in advanced industries. The Electro-magnet and return spring alternatively drive the piston inside the cylinder, the mechanical resonance of which is synchronized with the input current cycle. In a single mechanism, the piston combines the functions of two normally independent devices; the pump and the motor. A silicon diode in between the coils or inverter converts the full-wave input current into half-rectified current. In turn this activates and deactivates the electro-magnet, producing a smooth mechanically resonating action. The energized electro-magnet attracts the piston, compresses the return spring, and draws air into the cylinder through the opened inlet valve. When the electro-magnet is de-energized, the return spring pushes the piston back, forcing the compressed air out of the cylinder through the now opened outlet valve. Low pressure series covers a flow range from 8 to 90 Nl/min with a max pressure of 0,45 bar Intermediate pressure series covers a flow range from 2,5 to 20 Nl/min with a max pressure of 3 bar Vacuum series covers a flow range from 3 to 65 Nl/min with a max vaccum of 800 mbar.
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