By Greg Washburn and Joshua Belisle · Edited by Dana Gardner
Published August 9, 2024 · Reviewed by Greg Washburn · July 30, 2026
Summary
How do you proportion virgin and regrind with a conveying receiver?
Simple proportioning or layering of materials such as virgin and regrind can be done with an external proportioning valve mounted on a receiver’s material inlet. Internal valves open and close to let each material into the receiver in the desired proportion. The valve works with receivers and loaders, and a clear polycarbonate window lets operators confirm the layering visually.
Simple proportioning/layering of materials, like virgin and regrind, can be accomplished with the use of an external proportioning valve. This reliable device can be added to the material inlet of any receiver. The internal valves open and close to allow the desired proportions of the materials to be introduced into the receiver.
TIP – Clear polycarbonate window in proportioning valve allows visual confirmation of proper layering.
Frequently Asked Questions
Can a proportioning valve be added to an existing receiver?
Yes. An external proportioning valve is added at the material inlet of a receiver, and it also works with loaders. Its internal valves open and close to bring each material into the receiver in the desired proportion, layering materials such as virgin and regrind.
How can I check that a proportioning valve is layering correctly?
The external proportioning valve has a clear polycarbonate window. Because the valve mounts at the receiver’s material inlet, watching material pass through that window gives visual confirmation that virgin and regrind, or other materials, are layering properly.
About the Authors
Vice President of Operations, Novatec
Greg Washburn is Vice President of Operations at Novatec and has been with the company for more than three decades. He is involved in all phases of engineering design and product manufacturing, giving him a broad perspective on how resin drying and conveying equipment moves from engineering concept through production and into real-world processing environments. Greg holds a B.S. in Mechanical Engineering from the University of Maryland, Baltimore County (UMBC) and an MBA from Loyola University Maryland. His experience spans engineering, manufacturing and operations across Novatec’s material-handling technologies.
Technology Manager, Novatec
Joshua Belisle is Technology Manager at Novatec, where his work focuses on simulation and technology development for resin drying. He earned a B.S. in Mechanical Engineering with a minor in Engineering Business from the University of Virginia in 2023 and joined Novatec that same year. Joshua uses simulation tools to investigate previously difficult-to-measure aspects of the drying process, helping Novatec better understand airflow, heat transfer and other variables that influence resin-drying performance.
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