Hydraulic hand pump works cam is rotated by the motor. When push the plunger upward movement of the cam, piston and cylinder seal formation volume decreases, the volume of oil out from the seal, and discharged through the check valve to go where it is needed. When the cam portion is rotated to decrease the curve, the spring forces the plunger downwardly, a certain degree of vacuum, the oil tank into the sealed volume under the effect of atmospheric pressure. Cam constantly lift the plunger seal periodically decrease and increase the volume of the pump suction and discharge of oil have continued. How to be safe and reasonable to use a hand pump? In order to complete our work, manual hydraulic pump for use in the process, often require certain inspections, its use must not exceed 63MPa pressure job. Not free to mobilize the high and low pressure valve; when its work should be smooth shake the handle, so that the oil may not have the urge phenomenon sbd20d hand pump, so that each valve and lasting work; when their needs should be reduced slowly twist handwheel syb-1 hand pump, does not cause decompression too fast; in addition to the relevant manual hydraulic pressure hose needs to make a pressure test every six months, to prevent the hose aging accidents. Test pressure lower than 90MPa, which happened when raised leakage can not be used. According to the relevant article describes syb-2 hand pumps, hand pump can understand is a manual control valve opening and closing drive hydraulic equipment, hydraulic equipment by hand (includes tank), manual valve, safety overflow valves and other components of the system components. Continuous pressing the joystick (bar) manual pumps, piston work, pressure increases, so that the pilot valve reaches the open or closed position. When the pressure reaches a maximum working pressure relief valve opens, high pressure oil spill back to the storage tank through the safety valve, hydraulic pipeline has remained constant, to ensure system security. I hope that by telling the above knowledge, you can better help to you. sbd20d hand pumps, hydraulic power Lu (certified), hand pump provided by Lu of hydraulic equipment plant in Texas. Texas Lu force hydraulic machinery plant (www.luliyeya.com) is a leader in Dezhou, hydraulic machinery and parts, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Lu Hydraulic leadership with the staff warmly welcome all inquiries negotiations to create Lu hydraulic force a better future.