VR range of blowers are designed for bulk vehicle operations to generate pressure or vacuum for pneumatic loading and unloading of grain, animal/ poultry feed and other granule products from factory/ warehouse to customer's silo. These are designed for oil free air volume of 500 to 2600 M³/hr at differential pressure of -500 to + 1200 M bar.These blowers can be driven by truck/tractor PTO, separate engine attached to chassis or hydraulic motor. These can be mounted for vertical /horizontal flow and have additional shaft to drive hydraulic pump for Rotary / drop valve and auger.These blowers are compact and light weight for flexible mounting on chassis below the tank. Driver can monitor speed of these blowers and can unload tanker to customer's silo within less than an hour.