... The main products are belt conveyor, bag filters, and belt conveyor accessories, including rollers, pulleys and roller frames, etc. With a wide range, ... Management system: ISO9001:2008, ISO14001:2004,GB/T2800 Production Capacity:Material: Roller pipe using ERW pipe , and the ... the pressure sameness, so the roller turn unimpeded . belt conveyor roller with frame passed ISO9000 in machinery in china