... stable capability, good performace and servies aluminium hydraulic high pressure single HGP-3A series HGP-3A seriesFeature1,Maximum pressure250bar ... . . The special design of oil-free bearings operating under high pressure. . Can be forward, reverse, reversing. . Synchronous motor ... materials, such as oil seals, 0-ring or around the cover. aluminium hydraulic high pressure single HGP-3A series gear ...