parher Hydraulic Hose Fittings according to the form and friction materials,

according to the form and the friction of the material. Oil in contact with the stator blade surface and vane pump in motion easy to wear, its steel - steel friction material, as applicable to the ZDDP anti-wear agent L-HM anti-wear hydraulic oil; piston cylinder, oil pan, form and movement forms piston friction is also suitable for hydraulic hose clamps use HM hydraulic oil, but there are bronze piston pump parts, due to the effects of this material components with ZDDP corrosion and wear, so it is not piston bronze pieces use with ZDDP as additives HM hydraulic oil sae flanges. Meanwhile, the choice of hydraulic oil and hydraulic systems must also consider its sealing material to adapt. General vane pump can be used zinc anti-wear hydraulic oil, piston best selection of ash-type oil. Vane pump pressure is higher than 15MPa, piston pressure is higher than 30MPa, pump hydraulic system two models exist, and should be used in compliance with Denison HF-0 specification oil. Gear pumps, vane pumps and piston pumps are the main hydraulic system pump type, the order of the hydraulic oil lubrication effect of the three pumps is less wear vane pump> Pump> gear pump. Therefore, all the main oil pump vane pump hydraulic system pressure regardless of the size selection HM oil as well.