Ruian Shengda Controller Co., Ltd. is the manufacturer founded in 1995, specialist in producing magnetic powder clutch/brakes, tension controllers, air disc brakes and air inflatable shaft for more than 20 years, which has a perfect quality management system, advanced experimental testing methods, perfect product quality pursuit, still adhere to be "professional, high quality and high efficiency". The products have reasonable structure, beautiful appearance, excellent performance and reliable quality, which make it have the high reputation in China and all around the world and be widely used to control the tension of rewinding and unwinding in papermaking, printing, plastics, rubber, textile, printing and dyeing, wire and cable, metallurgy and other relevant rolling and coiling processing industry. In addition, the magnetic particle clutch can be used to buffer start, overload protection and control speed. Magnetic powder brake is also often used for dynamometer load and brake in the transmission machinery.