Non-symmetrical external

Asymmetric external U-seal is a piston seal designed to offer effective bore sealing in a wide variety of applications. Design provides stable fit in the housing, ultimate sealing effect over a wide temperature range. Avoids extensive drag pressure. Back to back arrangement with guide rings in between for double acting pistons or to separate different fluids.

The outer dynamic lip is shorter and more robust to provide improved sealing and compression set characteristics over conventional U rings.