Spherical check valve This Engel valve features a new surface geometry at the sealing points to facilitate valve closure, especially when processing glass-fiber-reinforced compounds. It can replace existing valves on plasticizing units.
What’s new? The spherical check valve, which features barely perceptible changes from previous valves that make it more effective. Older valves had flat surfaces, but the new surface is slightly spherical, allowing the polymer to form a thin film on the surface. The valve’s specially developed geometry allows for high reproducibility and improves the disengagement of the check ring from the check tip before the start of injection; it also eliminates the need for compression relief after dosing.
Benefits Precision, reliability, improved sealing performance, and reduced leakage and wear.
Engel Machinery Inc., York, Pa., 717-764-6818, www.engelglobal.com
Karen Hanna | Senior Staff Reporter
Senior Staff Reporter Karen Hanna covers injection molding, molds and tooling, processors, workforce and other topics, and writes features including In Other Words and Problem Solved for Plastics Machinery & Manufacturing, Plastics Recycling and The Journal of Blow Molding. She has more than 15 years of experience in daily and magazine journalism.
