... with the medium convey cavit “Feiya” QDM-901 Pneumatic Diaphragm Pump Field of application: Printing: ink(water-based, gravure), solvent ( ... adjustment;Third, self-lubricating, low gas consumption, mobile install and use;Fourth, medium outlet pulse-free, no impact exercise, feed fluid ... work, you should first turn off the inlet regulator, then use finger pressing start up pin, open the inlet valve can ...