RB-1520 fan with front bearing design principle, two bearings placed in front of the fan blades and the rear end of the motor to achieve the best balancing configuration, and conducive to heat. Fan for cooling fins front end, while the rear bearing cooling fan in the fan comes to work, so as to maintain long-term work at low temperature bearing fan RB-1520 Features: 1, easy to install all the wind pressure blower can be installed in any use of premises for compressed air or evacuated. And can install any horizontal or vertical direction. 2, rugged body with all the wind pressure blower ADC12 aluminum alloy casting, different from the general system of steel or aluminum AC10 blowers, ADC12 material and Mercedes Benz wheel drum the same material, and more durable. 3, high reliability, in addition to the impeller, the whole wind high pressure air is no other moving parts, and is directly connected to the impeller motor, no gears or belts, therefore high reliability and virtually maintenance-free. No gas, no pollution, the impeller rotates, not with any missing, lubrication-free, so you can guarantee one hundred percent without oil. 4, low vibration all the wind pressure blower parts from Germany, Japan imported processing and testing equipment, running some of the parts have to undergo a very precise balance of design, testing, calibration so the vibration rate is very low. 5, low noise RB-1520 high-pressure low-noise fan motor direct drive, access Individually Built muffler reduces operation noise. Vortex pump impeller blades composed by the dozens, which is similar to large gas turbine impeller. The air between the impeller blades by the effect of centrifugal force, the edge of the movement of the impeller, where the ring of air into the pump cavity, again starting from the leaves in the same way further cycle. Generated by the rotating impeller circulating air, leaving a very high energy pump for use. Pump using special motors, compact structure, small size, light weight, low noise, sending gas source anhydrous oil.