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STB15 profile is a 2-part pressure activated triangular back-up ring that has increased thickness for extreme high-pressure applications.

The profile is designed to be used in conjunction with single acting / uni-directional rod seals which require protection from excessive clearance / extrusion gaps or applications working in high pressure and high temperature applications. This part is commonly used in conjunction with many of our spring energised seals working in HPHT environments.

The ring can be supplied angle split to ease installation and to ensure the ring expands when subjected to system pressure, when this pressure is applied the clearance / extrusion gap is closed by the ring and the sealing element is prevented from flowing into the gap allowing longer trouble free service. However, the ring can be supplied in an endless / solid format when split / two pieces housings are being used and installation of a split ring could be problematic.

This part is available in many thermoplastic and thermoplastic elastomer materials to suit every application, talk to our technical team to discuss your requirements.