The product name ZYBW250E dry type composite rotary-vane vacuum pressure pump Performance characteristics ZYBW... E dry rotary vane vacuum pressure composite air pump town at the same time provide + 60 kpa suction vacuum and compressed air. Is a ZYB... A type oil pump and ZYBW... An upgraded version of B type dry type air pump. With exhaust purity, small size, low noise, low temperature, easy maintenance, etc, the reliability of continuous running has been close to the level of similar foreign products. The products are widely used in printing, packaging, printing, cigarette, etc.