The product name ZYBW80/100/140FDry type composite rotary-vane vacuum pressure pump Performance characteristics ZYBW... F type dry type rotary vane vacuum pressure composite air pump is ZYBW... E pump is derived products. It can breathe in a vacuum - 60 kpa, exhaust pressure or less or less under the condition of 60 kpa, produces 30 kpa air vacuum. Therefore, it can be in the process of high-speed printing multicolor offset printing machine, paper delivery and recovery task independently, and is the only alternative for Heidelberg offset press pump products. Range of application Factory before 1990 Heidelberg four open presses with 1 ZYBW80F can; 1990 years ago the factory outside Heidelberg printing machine with 1 ZYBW140F can.