Sealing rings with rectangular cross-section marked as OP

Sealing rings with a rectangular cross-section marked as OP are resistant to damage and high overload. They have been developed as an alternative to O-rings in static applications.   The square cross-section allows the entire contact surface to be adapted to the sealed surface. The flexibility of the ring allows assembly without the use of additional aids.   OP sealing rings guarantee a very good seal, which increases with increasing pressure. Designed for dynamic and static connections, where high sealing pressure force is required for working parts and devices. They are most often used in hydraulic drives and controls.   What material are the OP sealing rings made of?   OP sealing rings are most often made of materials such as:   NBR   Nitrile rubber works in the temperature range from -30 ° C to + 100 ° C. Resistant to mineral oils of plant and animal origin. Stable in contact with mineral lubricants, aliphatic hydrocarbons, as well as diluted solutions of acids and bases up to + 50 ° C. NBR rubber is also resistant to media such as: non-flammable hydraulic fluids type HFA and HFB and water up to + 100 ° C.   EPDM Ethylene-propylene rubber works in the temperature range from -50 ° C to + 130 ° C. Resistant to hot water and steam, brake fluids, solutions of acids and bases, esters, ketones. Stable in contact with flame-retardant HFC and HFD hydraulic fluids.   FPM Fluorine rubber works in the temperature range from -20 ° C to + 200 ° C. Resistant to silicone, mineral, synthetic, gear and transformer oils. Stable in contact with mineral lubricants, gaseous fuels, flame-retardant HFC and HFD hydraulic fluids, as well as aliphatic and aromatic hydrocarbons. Resistant to UV radiation and ozone.   Silicon Silicone rubber works in the temperature range from -50 ° C to + 200 ° C. Resistant to media such as: diluted salt solutions, alcohols, water up to + 100 ° C, as well as mineral oils and greases.