Stenso - Hovedkatalog 2019

ASL-Seal is spring-activated: The seal consists of a U-shaped profile gasket in which a metallic ring is incorpo- rated as a prestressing element. To enhance sealing characteristics and service life, the (internal) dynamic sealing lip is designed as somewhat more robust than the (external) static lip. The presence of a collar on the outer edge prevents the seal from rotating along with the shaft A. All profile gaskets are made form modified PTFE materials. The standard material for all general purpose applications is Compound 3 incombination with a pre- stressing spring from stainless steel. 1 Spring constructions 0: Stainless Steel for general applications (A). 1: Stainless Steel for aggressivemedia (B). 2: Stainless Steel for general applications, but cast in silicon (C). 3: Stainless Steel for aggressivemedia, but cast in silicone. : In types 2 and 3, the space around the spring (spring groove or slot) is filled with sili- cone . Since the seals can be sterilsed, they are preferentially used in the foodstuffs industry . 281 ASL-Seals Spring-activated rod seal for rotation Materials Overview: ALS-Seal body : AF-1022: Very good chemical resistance, outstanding shear characteristics, special purpose and intermediate stress applications. AF-2426: PTFE with Carbon: good abrasion resistance and inherent stability, good chemical resistance, used in water and water-oil emulsions with intermediate stress. Also designed for dry runs. AF-1111: PTFE with Econol - very high abrasion resistance and inherent stability, used in hydraulics and abrasive pressure fluid applications.