Flow valve stem, which USES the throttle opening of valve core and valve body plane or the size of the object surface and its resistance to flow into adjustment, so curb the movement speed of executive element, the. ( 1) Overflow valve: to restrict the hydraulic system to maintain a constant condition when reach the setting pressure. When the valve core in the median, all oil mouth truncate, components of fixed; When the valve core is moved to the right, P pass with A, B and O. When the valve core is moved to the left A P and B, A and O. ( 2) Can reduce the pressure valve: stem branch circuit is lower than the primary loop hydraulic safe pressure. ( 2) Speed regulating valve: can maintain the throttle load pressure changes in the imported pressure differential for the fixed value. So, the actuators can be is, reverse movement. Check valve: only allow fluid in the pipeline of unidirectional connected, reverse the truncation. Q: office specific classification and principle of the hydraulic valve stem a: pressure stem valves according to use can be divided into the overflow valve, reduce the pressure valve gentle euphemism sequence valve. Pump pressure to drive the hydraulic cylinder 1 movement, at the same time, pass along the sequence valve inlet utility in size, A plane or on the surface of the object, when hydraulic cylinder 1 movement into absolute pressure, utility in the plane or the size of the surface of A aspirant thrust is greater than the spring after the setting of the valve core is rising oil inlet and the oil outlet through, make the hydraulic cylinder motion. ( 5) Shunt collector valve: collecting valve diverter valve and two functions. Marine valve ( 1) Throttle valve: in setting throttling mouth after plane or the size of the object surface, can make small as load pressure changes and movement average sex requirement is not high movement speed of executive element, the basically maintain safe. ( 3) Follow the sequence valve: can you make a actuators ( Such as hydraulic cylinder, hydraulic motor, etc. ) Action in the future, then follow the order to other components of action. When the system fails, the pressure to could lead to damage of frame value, the valve will open and the overflow mouth, in order to ensure the safety of the system. ( 4) Collecting Industrial Valves: utility, in contrast to the diverter valve, flow into the collector valve flow proportional distribution. 。 Direction stem valves according to use can be divided into one-way valve and directional control valve. For reprint try our best to take care of the overflow valve is called the relief valve. ( 3) Diverter valve: whatever load volume, can make the same oil source two actuators to obtain equivalent flow diverter valve for the amount or synchronous valve; Obtain the proportional distribution flow for the proportion that the purge valve. Reversing valve: change between different lines of flux, broken relationships, based on the office location for several points in the valve core in the body, two, three, etc; By using a two-way channel number of points of the stem, tee, four-way, five-way, etc. ; On the basis of valve core driving form separation movement, motor, electric, hydraulic, etc. Reduce pressure valve is different according to its stem pressure function, and can be divided into fixed value lower pressure valve ( The output pressure is constant value) , lowered the pressure valve ( The input and output pressure difference for fixed value) And constant ratio to reduce pressure valve ( Maintain a certain proportion between the input and output pressure) 。 Stem flow valve according to use can be divided into 5 kinds. So, at the throttle mouth plane or resize set on the surface of the object in the future, no matter how load pressure changes, speed regulating valve can maintain through the throttle valve flow rate unchanged, so make the movement speed of executive element, the safe. Notes to the order: The national standard) A, A: B: product name, model, nominal size medium and temperature, pressure range C: whether there is attachment, delivery time, and special requirements so that we can correct selection for you. Second, if the valve has been selected by design unit of our company model, please order according to the valves parameters directly with our sales center. Three, it is very important when you use the occasion or the environment is more complex, would you please provide design drawings and detailed parameters, our engineers experts will concentrate on review and analysis for you. 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