Hydraulic actuators are used to perform the hydraulic pump supplied energy into mechanical energy of means, including hydraulic cylinders and hydraulic motors. The hydraulic motor is the hydraulic pump means work to do the opposite, that is, the energy conversion is called hydraulic mechanical energy, whereby external work. Hydraulic control components used to control the direction of liquid flow, the pressure level and the expected size of the flow will be controlled to meet specific job requirements. It is because of the flexibility of the hydraulic control components, such that the hydraulic control system can perform different activities. The use according to the hydraulic control elements can be divided into the pressure control valve, flow control valve, the directional control valve. Mode of operation can be divided according to human manipulation of valves, mechanical manipulation method, electrically operated valve. Hydraulic jack is the emergence of new problems to buy or repair: a heavy large enterprises purchasing department leaders recently more tangled, the unit used for many years in the hydraulic jack goes wrong, when jacking operations are often no reason to stop, show overload, fault-off continued, accompanied by leakage, noise has been particularly large. From a cost point of view, unit leaders asked to fix re-use, because this hydraulic jack was used more than three years. They read books and use the original warranty book, found that the products have been the warranty period, due to a wide range of machine malfunctions, displayed a more serious problem, repair what needs to jack a few thousand dollars, and then buy the machine, but can not more than 30,000 yuan. By using the jack unit that peer counseling, hydraulic jacks are the pros and cons of electric hydraulic jack repair, maintenance undoubtedly save resources and reduce the company's costs, unit costs spent is relatively small, but the follow-up may still be other fault; buy new fault less, but increased the company costs, investment is relatively large. Is the repair or buy it EHV sync jack, leading a unit of the Technical Purchasing Department Mo Show, so I consulted Lu force hydraulic press machinery production experts, get the following answer, due to the purchase of a hydraulic jack unit only uses only 3 year of this failure, the failure to determine the cause of aging should be a plurality of components, indicating the usual maintenance very place, even if the fix, it will continue to follow a very short time to expose other problems, then repeat investment while also affect the normal production of enterprises, it is dangerous and may even produce hydraulic jacks, this case is better to buy a new hydraulic jacks. At present, more mature technology of hydraulic jacks, multi-function, appearance generous, cheap prices, and choose to buy a new jack, which means more peace of mind, so that although more investment, and can bring the subsequent years of peace of mind, and the old The machine can still be repaired discount deal to those who need it, or keep doing spare machinery. Single-acting jack, Lu Hydraulic (certified), provided by the Texas Jack Lu force hydraulic machinery plant. 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.