For applications requiring controlled flow rates from a trickle to 40 gallons per minute. Especially suited to the requirements of bottom printing corrugated lines, where a single pump provides both supply and suction return.

These pumps operate by the movement of two flexible diaphragms which move back and forth, alternately filling and emptying two chambers. Flow is controlled with the air inlet valve, which then determines pump speed. A variety of applications are possible because the pump’s inlets and outlets can be configured in different ways, such as “one-in one-out”, “1-to-1”, “two-in two-out”, or “2-to-2”. In the 1–to-1 option, one color is sent to the deck. In the “ 2-to-2” configuration, you can deliver one material and also draw it back, or deliver two inks to two different decks. Diaphragm pumps do have a pulsating flow and are best use with a Graymills surge suppressor/filter.

Centrifugal Ink Pumps

Centrifugal pump for use on mid and wide web flexo and gravure applications, especially those requiring more flow and/or higher print decks. Tri-rod construction and Teflon coating for easy clean-up. Optional Quick Demountable motor. ATEX and CE compliant models available. Fits in 5, 10, 20, and 30 gallon standard steel or stainless steel tanks.

Centrifugal Ink Pumps

Centrifugal pump for use on small presses requiring flow rates of less than 1 GPM and viscosities up to 30 sec. No.2 Zahn. These pumps have a high strength thermoplastic pump body, stainless steel shaft, ½” NPT discharge tube, and agitor jet for in-tank circulation. Available in 1 or 2 gallon tank size. Non-explosion-proof, explosion-proof, and air motor options.

For mid to wide web flexo, gravure, and rotary screen applications and light to heavy viscosity inks, coatings and adhesives (including UV/EB), requiring flow rates of 4.5 GPM or less. Available with electric gear motor with electronic variable speed control (115/230 VAC) 50/60 Hz or ATEX electric gear motor with variable speed control (230/460 VAC, 3 Ph) 50/60 Hz.

Optional “Quick Change” removable head Model PQL. Pump head/tube changes are accomplished in seconds without tools. Simply pull the lock-pin, remove the used head, and replace with another head loaded with clean tube. PQL models include all of the features of the standard PPL models. “Quick Change” heads can be retrofit to Graymills peristaltic pumps made since January 2005.