This industry workhorse is low maintenance, takes a lot of abuse, and delivers ink in a non-pulsating flow. Graymills centrifugal models provide in-tank circulation to keep the material in the tank blended. Available with electric or air motors, with a Quick Demountable motor option. Flow is easily controlled by the use of valves, or in the case of air motor models, by the flow of air to the motor.
(16) Also know as a “tube” pump, the peristaltic pump utilizes a flexible tube which passes through a head and is squeezed by two rollers that push the ink to the print deck. These pumps are excellent for low to high viscosities, UV and EB. A variable speed motor controls the flow (no valves or by-passes required). Graymills peristaltic ink pumps are reversible so that ink can be drawn back from the print deck at the end of a run, reducing turn-around time. Additionally, they are easy to clean: pump cleaning fluid through the whole ink system, wipe the outside of the hose that was in the bucket, and the system is clean – or use the “Quick Change” Removable Head option and change over the entire system in seconds.
(26) These air driven pumps operate by the movement of two flexible diaphragms that move back- and-forth, alternately filling and emptying two chambers. As each chamber is emptied, the ink is pushed toward the print deck. A variety of applications are possible, because the inlets and outlets can be configured in different ways. Good for corrugated bottom printers. Pump function produces a pulsating flow, so Graymills surge suppressor filters are strongly recommended.