Stenso - Hovedkatalog 2019

Piston seals series AF-541 has been success- fully used in hydraulic cylinders for many years. It can only be used in cases of unilat- eral pressure applications on pistons if used as a single seal. The seal can be assembled in split and un- split/single and multiple piece pistons. For use in an undivided groove, profile ring must be carefully pried apart and subsequently cal- ibrated in the cylinder bore. Dynamic slide ring (PartA) Slide ring section is rectangular and is provided with a stepped sealing edge on the pressure side. On the opposite side, the profile travels under a flat wedge/angle. This special form of sealing profile helps to achieve a recovery effect. This means that the persistant oil film present on the cylinder wall during motion is conveyed back to the surge chamber. Profile gaskets are manufactured from specially modified PTFE materials. Com- pound 5640 is the standard material of construction (MOC) that is used in hydraulics applications. This material is particularity superior in respect of very high abrasion re- sistance, inherent stability, very good shearing characteristics and very good ther- mal and chemical resistance. O-Ring (Part B) O-rings are standard sealing elements with circular cross section. Those used in the present application conform to the series of dimensions as per AS 568 A (American norms). Standard MOC for hydraulics applications is NBR, which guarantees partic- ularly good resistance to hydraulic fluids. For use with profile gaskets O-rings with hardness of 70 Shore-Aare preferred. Materials Overview: O-Rings N: Acrylonitrile-Butadiene-Rubber - Used in general machine construction, hydrau- lics, pneumatics. Resistant to mineral oil based pressure fluids, HFA, HFB and HFC fluids, and water. F: Fluorine containing Rubbers - Used at high temperatures and aggressive sur- rounding media, resistant to mineral based and synthetic pressure fluids, aliphatic, aromatic and chlorated hydrocarbons, phosphate-ester based poorlz inflammable fluids. E: Ethylene Propylene Diene Rubbers - Used in armature and pump industry. Resis- tant to hot water, steam, phosphate-ester based poorly inflammable fluids but is not resistant tomineral oils! S: Silicone-Rubbers C: Chloroprene Rubbers 66 Single Acting Piston Seal AF-541 Materials Overview: AF-1012: Virgin PTFE - outstanding chemical resistance - used in chemical, foodindustry and pharmaceutical industry with light mechanical stress. AF-1022: PTFE with additive - Very good chemical resistance, outstanding shear characteristics, special purpose and intermediate stress applications. AF-4115: PTFE with Glass fibre/lubricant - high abrasion resistance and inherent stability, good chemical resistance, used in various areas of industry and intermediatestress hydraulic 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-5640: PTFE with Bronze/additive - high abrasion resistance and inherent stability, very good shear characteristics, good chemical resistance, used in intermediate to high stress hydraulics application. AF-1111: PTFE with Econol - very high abrasion resistance and inherent stability, used in hydraulics and abrasive pressure fluid applications. AF-8172: PUR - very high abrasion resistance and inherent stability, used primarily in intermediate stress hydraulics applications.