Pressure: the standard cylinder had two kinds of pressure levels for E and G. E-class applied to pressure more than 6.3 Mpa ~ 16Mpa of the hydraulic cylinders (E-cylinder).G class applied to pressure more than >16Mpa~25Mpa of the hydraulic cylinders (G-cylinder). 2). Seal: E-cylinder used simple structure, good wear resistance, 3). Dustproof : The hydraulic cylinders adopted polyurethane or rubber free- skeleton dust ring. 4). Applicable media: hydraulic oil, machine oil, emulsion, Inapplicable to organic phosphate . 5).Applicable temperature:-40 -+120
