STE105-170-145-025 is a double acting piston seal that works as double acting - 5 pieces and can be used in piston applications. The material used on this double acting piston seal is made of NBR/TPE/POM/GLASS-FILLED-POM 80 shore. The maximum allowed pressure is 400 BAR.
The dimensions has an inner diameter of 145 mm, an outer diameter of 170 mm and a height of 25.4 mm.
About the sealing profile STE105
STE105 compact seals which have a widespread use are used as double acting sealing elements in hydraulic cylinders' piston applications. They can be easily assembled thanks to their 5-piece design. STE105 piston seal guide rings are made of POM, when the inner dimension is smaller than 50 mm. When the inner dimension is greater or equal to 50 mm, the STE105 piston seal guide rings are made of glass filled POM to increase guiding performance and compression strength.
About the material NBR/TPE/POM/GLASS-FILLED-POM
Nitrile is a widely used nitrile butadiene and acrylo nitrile polymer. The NBR formulas typically contains between 30% and 50% acrylonitrile (ACN). The NBR which has a working temperature between -30°C and +105°C (peak temp. at +130°C) show extremely high resistance under different working conditions such as mineral oils (H, H-L and H-LP type lubricating oils) and grease and mineral based fire resistance oils (HFB and HFC group oils), vegetable and organic oils, and aliphatic hydrocarbons (propane, butane, petrol). NBR is not recommended for aromatic hydrocarbons (benzene, trichloroethylene, HFD type fire resistance oils), glycol and ether contained break hydraulics. TPE materials are widely used in hydraulic-pneumatic applications with a variety of combinations due to their high resistance to mineral oils and high tensile strength. Working temperature is between -40°C and +120°C. Polyacetal (POM) (Polyoxymethylene) materials are used as back-up rings or guidening element materials in hydraulic and pneumatic systems. There are two types of POM, filled with or without fibreglass, depending on their use. Despite working temperatures ranging from -40°C to +140°C, real dimensions can not remain stable in excess of 100°C. It can be used safely with mineral oils and HFA, HFB type oils. Types with added fibreglass provide longer lasting contact pressure resistance.
