The superimposed hydraulic control check valve is a hydraulic component that realizes the reverse flow of the check valve by controlling the fluid pressure. Its working principle and characteristics are as follows: 1. Core structure The superimposed hydraulic control check valve is mainly composed of the following components: steel valve body: as the main structure, providing the installation and connection foundation. One-way valve assembly: Contains one or two check valves (such as check valves 2 and 3) to ensure one-way flow of oil. Pilot piston: The piston moves by controlling the oil circuit pressure to enable the opening or closing of the check valve. Pilot cone valve core: Located in the main valve core of the one-way valve, ensuring the precise opening of the one-way valve and improving sealing. 2. Working principle forward flow (free circulation) When oil flows from the oil inlet (such as A1) to the oil outlet (such as A2), the check valve 2 automatically opens under the action of oil pressure and the oil passes freely. At this time, the pilot piston 4 is pushed to the right position, and the one-way valve 3 is also opened simultaneously through the action of the pilot cone valve core 5 to ensure the smooth flow of the oil circuit. Reverse

The following key matters should be paid attention to when using the double-head solenoid solenoid valve (double solenoid solenoid valve) to ensure its normal operation and avoid failure: The axis of the solenoid reversing valve must be installed in a horizontal direction to avoid vertical installation, resulting in abnormal reversal or resetting of the valve core or armature due to gravity. The surface of the installation base plate needs to be ground and meet the flatness requirements to avoid oil leakage due to uneven installation surfaces. Ensure that there is enough space at both ends of the installation position for easy manual operation or replacement of the solenoid. The electrical connection and control power parameters (voltage, current type) must match the solenoid valve, otherwise it may cause the solenoid to fail to work properly or burn the solenoid. The dual solenoid cannot be energized at the same time. It is necessary to achieve action interlocking through the design of the electronic control system to avoid the valve core position being unfixed or the coil burning. Check the electrical connection status regularly to prevent failure caused by loosening or poor contact. The hydraulic system matches the reversing valve with the appropriate diameter according to the system flow rate, and

The use of superimposed hydraulically controlled check valves requires attention to the control pressure, selecting appropriate structures and oil drainage methods, and reasonably matching reversing valves. The specific details are as follows: Ensure control pressure and control pressure requirements: It is necessary to ensure that the superimposed hydraulically controlled check valves have sufficient control pressure, and the control pressure is absolutely not allowed to lose pressure. Pay special attention to whether the control pressure meets the requirements of reverse opening. If the control of the hydraulically controlled check valve is directed from the main system, the impact of the change in the main system pressure on the control oil circuit pressure should be analyzed to avoid malfunction of the hydraulically controlled check valve. Reasonable selection of structure and oil drainage method is based on the fluid resistance (back pressure) size after the reverse oil outlet cavity: For internal leakage superimposed hydraulic control check valve, when the reverse oil outlet pressure exceeds a certain value, the hydraulic control part will lose its control effect. Therefore, internal leakage hydraulic control check valve is generally used in situations where there is no back pressure or small back pressure in the reverse oil outlet cavity; while external leakage hydraulic control check valve can be used in situations where the reverse oil outlet cavity has a higher back pressure to reduce the maximum

The usage method of 4WE10 solenoid reversing valve mainly includes installation, operation, maintenance and other links. The following is a specific description: Installation selection installation location: 4WE10 solenoid reversing valve has a variety of installation locations, which need to be determined based on the actual hydraulic system layout and space requirements. For example, in terms of ambient temperature, when sealed with nitrile rubber, the ambient temperature is -30 to +50°C; when sealed with fluoroelastic rubber, the ambient temperature is -20 to +50°C. Connecting oil circuit: The 4WE10 solenoid reversing valve has oil inlet P, two working oil ports A, B and oil return port T. It is necessary to correctly connect each oil port according to the design requirements of the hydraulic system to ensure the oil circuit is unobstructed and avoid leakage or connection errors. Operation power-on and power-off control: This solenoid reversing valve uses the suction force of the solenoid to push the valve core to change the working position of the valve. When the solenoid is turned on, the control valve core will move from the stationary position to the desired terminal position, releasing the corresponding

The usage method of superimposed relief valve mainly involves installation, pressure adjustment and daily maintenance. The following is a detailed introduction: Installing superimposed relief valves is usually installed between the reversing valve and the bottom plate. Superimposed valves of the same diameter are superimposed in a certain order and connected in series with bolts. When installing, you need to pay attention to the damping holes on the oil circuit or main valve core. The pressure valve unit with the damping hole is the pressure valve unit, and the direction valve unit without the damping hole is the direction valve unit. Ensure the connection is correct. For example, during the installation process, it is necessary to ensure that the connection between the main oil circuit of the cone valve and the pilot valve and the control oil circuit is accurate to avoid the system from operating normally due to connection errors. Pressure adjustment and adjustment steps: When performing pressure adjustment, first loosen the lock nut and rotate the pressure adjustment screw clockwise, and the pressure will rise. After adjustment is completed, the lock nut must be tightened to prevent the pressure adjustment screw from loosening, resulting in unstable pressure. Note: The minimum adjustment pressure is equal to the characteristics of the minimum adjustment pressure

The use of solenoid reversing valve mainly includes the following aspects: Power connection: Before use, confirm the power type and rated voltage used by the solenoid valve, and connect the power supply as required. The solenoid is divided into DC or AC, so the control power supply parameters must be consistent with the solenoid valve, otherwise the reversing valve may not work properly or the solenoid is burned. Slide valve function inspection: Solenoid valves have multiple slide valve functions, and there are differences between formal and reverse installation when leaving the factory. When using it, check whether the slide valve function meets the requirements to avoid affecting the normal operation of the system. Oil cleanliness: Ensure that the cleanliness of the oil meets the requirements. Since the fitting gap between the valve core of the solenoid valve and the valve body hole is small, impurities may cause the valve core to be stuck, so the filtration accuracy of the oil must be strictly controlled. Oil return port pressure: Note that the pressure of the solenoid valve oil return port T should not exceed the allowable oil return back pressure. For example, an electromagnetic reversing valve with a rated pressure of 21MPa and 31.5MPa has an oil return port.