AM
The function of ring type Aston Seals AM is to avoid the extrusion and damage of the O-Ring that normally occurs in the presence of large gaps or high pressure. If pressure arises on only one side of the ORing, it will su! ce to " t one antiextrusion ring on the unexposed side. Two backup rings are necessary if the pressure rises on both sides. The AM ring hasn’t a cut or spiral shape (typical of PTFE backup rings) that could help damage the O-Ring especially in the presence of high pressure. Thanks to its elasticity, it can be installed very easily in a short time and without any auxiliaries. The material used is a medium modulus thermoplastic polyester resin, mainly used in the manufacturing of antiextrusion rings, that ensures an extra measure of performance and service life in application where properties such as abrasion resistance and tear strength are critical.
