We supply two types of rings, the frontal rings and sprue bushes.
HTS rings and sprue bushes are made of tool steel or copper, depending on the application.
There are different plunger ring and sprue bushing models made to fit different iTherm®, ABS, ATS and ARP plungers.
Made of soft steel or copper, the plunger ring is softer than the inner side of the sleeve and has been specially developed to enhance contact and sealing.
During injection, the ring opens due to the penetration of aluminium between the plunger body and ring and its own elasticity
Spring bush (also referred to as the back ring) has been specially designed for vacuum applications.
During injection, due to its own elasticity, the spring bush opens and ensures a vacuum.
Extended plunger and sleeve lifetime
Plunger rings have a lower hardness than tips or sleeves.
Compared to harder “scraper” rings produced by our competitors, HTS Plunger rings extend the lifetime of both pistons and sleeves.
Diameter 40 - 230 mm
Plunger rings are made using tool steel produced in EU, or cooper.
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