WG 45L suitable for 2-3 surgeries WG air compressor features compact structure, stable performance, large flow rate, easy operation and maintenance. Particularly the machine can be running without lubricant oil so that the compressed air from the machine does not contain any oil fume; air can be obtained, Because the air for dental apparatus must not contain any oil, this machine can be used as an independent air supply machine for dental therapeutic apparatus; also can be used in other areas such as medical care, scientific research, industrial production and daily life. All units in the machine sit on a cylindrical pressure vessel called air tank. Compression machine is main part of the air compressor. A motor drives directly the eccentric wheel-connecting bar system making the piston move reciprocally. The piston is made from high temperature resistant and abrasion resistant non-metal material and is able to work without lubrication for a long time. Compressed air discharged enters in the air tank, a barometer displays the pressure in the tank. When the pressure inside rises to 0.75 MPa, power is automatically cut off by a pneumatic control switch, the compressor is shut off. When the pressure inside lowers to 0.45 MPa, power is turned on by the pneumatic switch, the compressor starts again and the pressure in the tank gradually rises again. This happens repeatedly. The high quality compressed air can be supplied to dental therapeutic instrument. In addition air supply valve, drainage valve, safety valve and electrical switch box are installed on the air tank. WG series oil-less air compressor is classified as a single head. This compressor includes an air drier in the machine. WG series oil-less air compressor is equipped with switch box with starter inside. Each head is equipped with one switch box Oil Free Desiccant Dryer Twin Head Compressor Auto Drain to Waste or Holding Tank Fan Forced Intercooler 45 Litre Receiver Tank Filtered Air Intakes 1.5 hp Motor Quiet Operation