Lock-loop control loop by making the actuator during exercise at a location to stay for some time remain intact jack and prevent stop traverse. The hydraulic cylinder locking methods are adopted spool function for the "O" or "M" type three-valve lockout circuit, when two lYA, when 2YA are de-energized, the three valves in the neutral position, the hydraulic cylinder oil port was closed cylinder two chambers filled with fluid, the cylinder in place to stay "locked", without outside interference. Because valve is sealed by a gap, so there is a leak, the locking effect is not good, but simple structure. 2. The pressure control loop pressure control loop with a pressure valve to regulate the pressure of a part of the system or systems jack manufacturers, in order to achieve the regulator, pressure, pressure, unloading control quality jack to meet the requirements of the actuator pressure . (1) refers to the voltage regulator circuit regulator loop control system operating pressure, it does not exceed the value of a good tune in advance, or at different stages of the actuator pressure multi-stage conversion in the work process. Generally consists of relief to achieve this functionality. It can choose different size, type, quantity RSM series of ultra-thin, thin RCS series, large tonnage DYG series based on the actual situation of the scene 10T, 20T, 30T, 50T, 100T, 150T, 200T, 320T, 500T jack. And configuring 1.1KW, 2.2KW, 3KW, 4KW, 5.5KW, 7.5KW, 13KW different specifications pumping stations, equipped with high-pressure tubing of different lengths and proper dispensing valve, using a pump delayed more than the top of the method of construction to meet the adaptation job site requirements. Electric hydraulic jack | jack | hydraulic force provided by the Texas Lu Lu force hydraulic machinery plant. Texas Lu force hydraulic machinery plant (www.luliyeya.com) strong, credible, in Dezhou hydraulic machinery and components industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Lu Hydraulic and you hand into the brilliant, for a better future!