RF roller feeder, which was researched and developed independently by our company, is a special sealed equipment for material transportation. It aimed at solving main problems of vertical mill feeding system. During the design process, company absorbed advanced technology and experiences both in China and abroad. This product is the core part of vertical mill feeding system in building material industry, steel industry and mining industry. Due to its advantages such as better capacity in air locking and in steady pressure, dust proof, energy saving and low maintenance rate, it can lower power consumption of grinding system and increase productivity. RF roller feeder filled a blank in domestic market. It is definitely the most cost-effective option for our customers.