Unitized Pistons

Originally designed and patented by Hallite Seals over 25 years ago, the Unitised Piston continues to establish and develop itself as a unique solution for our customers many and varied applications.
Produced today in a wide range of sizes, bearing and seal materials, Hallite’s exclusive Unitized Piston is available off the shelf in numerous standard metric and inch sizes.
A&S Seals Co., Ltd. is a global supplier of Unitized Pistons, HALLITE Seals, A&S Seals and many more. focusing on the various brands of seals supply