The company has a symmetrical three-bladed rotors blowers with very little clearance relative to each other during them. Since the rotor without any contact with each other and the body are not required for internal lubrication, consequently leaving them free of any contamination. They can be of particular benefit to low volume and space, commissioning, service and maintenance are easy and low energy consumption. The blowers in the cement industry, water and wastewater, food, pharmaceutical, chemical, oil and petrochemical, glass and crystal are used for fish. The blowers also can be used as a vacuum pump.