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Summary Description:

Classified by control method: manual, electronic control, hydraulic control.Classified by function: flow valve (throttle valve, speed regulating valve, diverter and collecting valve), pressure valve (relief valve, pressure reducing valve, sequence valve, unloading valve), directional valve (electromagnetic reversing valve, manual changeover valve) One-way valve, one-way valve, hydraulic control one-way valve).According to the installation method: plate valve, pipe valve, stack valve, threaded cartridge valve, cover valve.According to the control method: manual valve, motorized valve, electric valve, hydraulic valve, electro-hydraulic valve, etc.Directional control According to their uses, they are divided into one-way valves and reversing valves. One-way valve: Only allows fluid to be connected in one direction in the pipeline, and is cut off in the reverse direction. Directional valve: changes the on-off relationship between different pipelines. According to the number of working positions of the valve core in the valve body, it is divided into two-way, three-way, etc.; according to the number of controlled channels, it is divided into two-way, three-way, four-way, five-way, etc.; according to the valve core driving mode, it is divided into manual, motorized and electric. , Hydraulic, etc. In the late 1960s, an electro-hydraulic proportional control valve was developed based on the above-mentioned hydraulic control valves. Its output (pressure, flow) can continuously change with the input electrical signal. According to different functions, electro-hydraulic proportional control valves are divided into electro-hydraulic proportional pressure control valves, electro-hydraulic proportional flow control valves and electro-hydraulic proportional directional control valves.Pressure controlAccording to the purpose, they are divided into relief valves, pressure reducing valves and sequence valves. (1) Relief valve: It can control the hydraulic system to maintain a constant state when the set pressure is reached. The relief valve used for overload protection is called a safety valve. When a system failure occurs and the pressure rises to a limit value that may cause damage, the valve 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 main circuit oil pressure. According to the different pressure functions it controls, pressure reducing valves can be divided into fixed value pressure reducing valves (the output pressure is a constant value), fixed difference pressure reducing valves (the difference between input and output pressure is a fixed value) and fixed ratio pressure reducing valves. (Maintain a certain ratio between input and output pressure). (3) Sequence valve: After one actuator (such as a hydraulic cylinder, hydraulic motor, etc.) is activated, other actuators are activated in sequence.flow controlThe flow rate is adjusted by adjusting the orifice area between the valve core and the valve body and the local resistance it generates, thereby controlling the movement speed of the actuator. Flow control valves are divided into 5 types according to their uses. (1) Throttle valve: After adjusting the throttle area, the movement speed of the actuator with little change in load pressure and low requirements on motion uniformity can be basically kept stable. (2) Speed ​​regulating valve: It can keep the inlet and outlet pressure difference of the throttle valve at a constant value when the load pressure changes. In this way, after the throttle area is set, no matter how the load pressure changes, the speed regulating valve can maintain the flow rate through the throttle valve unchanged, thereby stabilizing the movement speed of the actuator. (3) Diverter valve: Regardless of the size of the load, an equal-volume diverter valve or a synchronization valve can make two actuators of the same oil source obtain equal flow; a proportional diverter valve can obtain a proportional distribution of flow. (4) Collection valve: Its function is opposite to that of the diverter valve, so that the flow flowing into the collection valve is proportionally distributed. (5) Diverting and collecting valve: It has the functions of diverting valve and collecting valve.

Details Introduction


Classified by control method: manual, electronic control, hydraulic control.
Classified by function: flow valve (throttle valve, speed regulating valve, diverter and collecting valve), pressure valve (relief valve, pressure reducing valve, sequence valve, unloading valve), directional valve (electromagnetic reversing valve, manual changeover valve) One-way valve, one-way valve, hydraulic control one-way valve).
According to the installation method: plate valve, pipe valve, stack valve, threaded cartridge valve, cover valve.
According to the control method: manual valve, motorized valve, electric valve, hydraulic valve, electro-hydraulic valve, etc.
Directional control
 According to their uses, they are divided into one-way valves and reversing valves. One-way valve: Only allows fluid to be connected in one direction in the pipeline, and is cut off in the reverse direction. Directional valve: changes the on-off relationship between different pipelines. According to the number of working positions of the valve core in the valve body, it is divided into two-way, three-way, etc.; according to the number of controlled channels, it is divided into two-way, three-way, four-way, five-way, etc.; according to the valve core driving mode, it is divided into manual, motorized and electric. , Hydraulic, etc. In the late 1960s, an electro-hydraulic proportional control valve was developed based on the above-mentioned hydraulic control valves. Its output (pressure, flow) can continuously change with the input electrical signal. According to different functions, electro-hydraulic proportional control valves are divided into electro-hydraulic proportional pressure control valves, electro-hydraulic proportional flow control valves and electro-hydraulic proportional directional control valves.
Pressure control
According to the purpose, they are divided into relief valves, pressure reducing valves and sequence valves. (1) Relief valve: It can control the hydraulic system to maintain a constant state when the set pressure is reached. The relief valve used for overload protection is called a safety valve. When a system failure occurs and the pressure rises to a limit value that may cause damage, the valve 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 main circuit oil pressure. According to the different pressure functions it controls, pressure reducing valves can be divided into fixed value pressure reducing valves (the output pressure is a constant value), fixed difference pressure reducing valves (the difference between input and output pressure is a fixed value) and fixed ratio pressure reducing valves. (Maintain a certain ratio between input and output pressure). (3) Sequence valve: After one actuator (such as a hydraulic cylinder, hydraulic motor, etc.) is activated, other actuators are activated in sequence.
flow control
The flow rate is adjusted by adjusting the orifice area between the valve core and the valve body and the local resistance it generates, thereby controlling the movement speed of the actuator. Flow control valves are divided into 5 types according to their uses. (1) Throttle valve: After adjusting the throttle area, the movement speed of the actuator with little change in load pressure and low requirements on motion uniformity can be basically kept stable. (2) Speed ​​regulating valve: It can keep the inlet and outlet pressure difference of the throttle valve at a constant value when the load pressure changes. In this way, after the throttle area is set, no matter how the load pressure changes, the speed regulating valve can maintain the flow rate through the throttle valve unchanged, thereby stabilizing the movement speed of the actuator. (3) Diverter valve: Regardless of the size of the load, an equal-volume diverter valve or a synchronization valve can make two actuators of the same oil source obtain equal flow; a proportional diverter valve can obtain a proportional distribution of flow. (4) Collection valve: Its function is opposite to that of the diverter valve, so that the flow flowing into the collection valve is proportionally distributed. (5) Diverting and collecting valve: It has the functions of diverting valve and collecting valve.

Key words:

Watch repair equipment, watchmaker, Auro

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