STE302-280-256-008 is a piston seal that works as single acting and can be used in piston applications. The material used on this piston seal is made of PTFE+BRONZE/NBR 70 shore. The maximum allowed pressure is 400 BAR.
The dimensions has an inner diameter of 256 mm, an outer diameter of 280 mm and a height of 8.1 mm.
About the sealing profile STE302
STE302 Piston seals are produced from a special compound of bronze-filled PTFE combined with an o-ring that is used as an energizing ring. They work as single acting in the hydraulic cylinders. They can be used safely at high sliding speeds due to the low friction force which is among one of the essential properties of PTFE material. Moreover, they can be used for different type of oils except mineral oils by changing o-ring material.
About the material PTFE+BRONZE/NBR
Improves thermal resistance, high pressure stability and extrusion resistance. It is the most preferred filler for hydraulic applications. 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.
