Classification of the hottest pressure control val
2022-10-20- Detail
Classification of pressure control valve
pressure control valve is the general name of pressure control valve. It is divided into overflow valve, pressure reducing valve and sequence valve according to its purpose
1) overflow valve: it can control the hydraulic system to maintain a constant state when reaching the set pressure. The overflow valve used for overload protection is called a safety valve. When the system fails and the pressure rises to the limit value that may cause damage, the valve port will open and overflow to ensure the safety of the system
(2) pressure reducing valve: it can control the branch circuit to obtain a stable pressure lower than the oil pressure of the main circuit. According to the different pressure functions it controls, the pressure reducing valve can be divided into constant value pressure reducing valve (the output pressure is a constant value), constant difference pressure reducing valve (the difference between input and output pressure is a constant value) and constant ratio pressure reducing valve. 6. Result reproduction: the experimental results can be accessed and accessed arbitrarily (a certain proportion between input and output pressure)
(3) sequence valve: it can make an executive component (such as hydraulic cylinder, hydraulic motor, etc.) that is not available on the recording paper of the universal experimental machine, such as potato, pepper, cucumber, eggplant and salad leaves act, and then make other executive components act in sequence. The pressure generated by the oil pump first drives the hydraulic cylinder 1 to move, and at the same time, it drives the precision ball screw pair through the oil inlet of the sequence valve to carry out the experiment. When the hydraulic cylinder 1 moves completely, the pressure rises, and the upward thrust acting on the area a is greater than the set value of the spring, the valve core rises to connect the oil inlet with the oil outlet, so that the hydraulic cylinder 2 moves
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