Double seal Balanced Independent of direction of rotation Multiple springs Its designed functions are the same as H7 series. Except for the installation dimensions of drive base, the other installation dimensions (d1<100mm) are according to DIN24960. It is suitable for medium which can easily solidify or contain fiber or particle. Combination of materials Sealing face Graphite, Silicon carbide, Tungsten carbide,Aluminum oxide Secondary sealing Acrylonitrile rubber, Fluorine rubber, Ethylene propylene rubber,PTFE Metal component Stainless steel Operating limits Specification: 14200 mm Pressure: ≤4.0 Mpa Temperature: -50220 Velocity: ≤20m/s Axial movement : d1≤100 : ± 0.5 mm d1>100 :± 2.0 mm