The characteristics of the 4WE10 single-head solenoid directional valve are as follows: heavy-duty design and high pressure resistance. The 4WE10 series adopts a heavy-duty design, with a larger valve core diameter, a working flow of up to 320L/min, a rated pressure of 31MPa, and a maximum pressure of 35MPa. It is suitable for heavy-duty machinery and equipment such as ships and injection molding machines. Its structure is standardized, durable and reliable, and complies with DIN24340 and ISO 4401 standards to ensure stable operation in high-pressure environments. Principle of combination of direct-acting and pilot-operated direct-acting: when the power is on, the electromagnetic coil generates electromagnetic force, which directly lifts the closing member to open the valve; when the power is off, the spring presses back the closing member to close the valve. It is suitable for small diameter, low pressure or vacuum conditions, with fast response speed, short action time and high opening and closing frequency. Pilot type: When the power is turned on, the electromagnetic force opens the pilot hole, forming a pressure difference to push the closing member of the main valve to move; when the power is turned off, the spring force or medium pressure pushes the closing member to reset. Suitable for high pressure difference or large flow scenarios

Stacked relief valve: full analysis of principles, adjustments and maintenance. As the core control component in the hydraulic system, the stacked relief valve assumes the important responsibility of stabilizing system pressure and ensuring the safe operation of equipment. With its unique structural design and flexible adjustment method, it has been widely used in industrial automation, construction machinery and other fields. This article will start from the basic concepts and systematically explain its adjustment methods and maintenance points to help readers deeply master this key technology. 1. The core characteristics of the stacked relief valve The stacked relief valve adopts a modular design concept and consists of a main valve core assembly and a stacked installation valve block. Its working principle is based on the pressure balance theory in fluid mechanics, and it controls the pressure and flow in the hydraulic system by adjusting the valve opening. When the system pressure exceeds the set value, the valve core automatically opens and leads excess hydraulic oil back to the tank to maintain system pressure stability. This design not only simplifies the hydraulic pipeline layout, but also realizes pressure control.

As a key component in the hydraulic system, the superimposed hydraulic control check valve has attracted much attention. The following is a detailed analysis of this hydraulic component: Working principle of superimposed hydraulic control check valve. Although the core working principle of superimposed hydraulic control check valve is similar to that of conventional hydraulic valves, it is the same in structural design and connection size, forming a standardized series. It not only has the control function of traditional hydraulic components, but also plays the role of oil passage. The layout of the main oil passage and bolt connection holes of each diameter series are consistent with the reversing valves of the same specifications, thus supporting flexible superposition and building a hydraulic control system with diverse functions. The valve is mainly composed of a solid steel valve body, one or two check valves, a pilot stage piston and a pilot cone valve spool embedded in the main valve spool of the check valve. When the oil flows from port A1 to port A2, the check valve (2) opens while pushing the pilot piston.

4WEH16 electro-hydraulic reversing valve is a combination device of an electromagnetic reversing valve and a hydraulically controlled reversing valve. The pilot oil circuit is controlled through the solenoid valve, and the main valve core is driven to move, realizing the switching of the direction of large flow liquid flow. Its working principle can be divided into the following steps: 1. The structure consists of a pilot solenoid valve: As a control unit, it is usually a two-position four-way or three-position four-way solenoid valve, and the valve core position is changed by energizing/disconnecting the solenoid. Main valve: Hydraulic reversing valve, with control chambers at both ends of the valve core, which pushes the valve core to move through pressure oil. Control oil circuit: includes two methods: internal oil supply (take oil from the main valve port P) and external oil supply (through independent oil circuit). The return oil is returned to the oil tank through the T port or the Y port. 2. Median state (both solenoids are powered off) Pilot valve state: The valve core is in the middle position under the action of the centering spring, cutting off the oil supply from the main valve control chamber. Main valve status: The pressure oil of the control chamber is returned to the oil tank through the T-port of the pilot valve, and the pressure at both ends of the main valve core is equal. Main valve core centering spring

4WE10 electromagnetic reversing valve is a key control element widely used in hydraulic systems. Its working principle is based on the solenoid force driving the valve core movement, thereby changing the fluid channel and realizing the fluid reversing control. The following is its detailed working principle: 1. The core structure consists of the 4WE10 solenoid reversing valve mainly consists of the following parts: valve body: housing, with multiple fluid channels designed inside, including one inlet and multiple outlets. Valve spool: a movable component that controls the flow direction of fluid through position changes. Electromagnet: A driving device, usually a wet AC or DC electromagnet, generates electromagnetic force when powered on. Reset spring: Used to reset the valve core to ensure that the valve core returns to its initial position when the power is off. Pilot control valve (some models): control the main valve core action through small flow rate to achieve more precise control. 2. Working principle 1. Electromagnetic force is generated during the electromagnet power-on stage: When the electromagnet is powered on, the coil generates a magnetic field, attracting the iron core (valve core) to move. valve

As a hydraulic control component for electromagnetic drive, the 4WE10 single-head solenoid reversing valve needs to focus on six core links: installation specifications, oil cleanliness, electrical matching, pressure flow control, operation interlocking and maintenance. The specific precautions are as follows: 1. Installation specifications: Ensure structural stability and sealing horizontal installation requires that the valve body axis should be kept horizontal to avoid vertical installation causing reversing or resetting actions of valve cores, armatures and other parts due to self-weight. For example, if installed vertically, the valve core may not be fully reset due to gravity, causing internal leakage or action stagnation. The flatness of the installation surface The surface of the installation base plate needs to be grounded and processed, and the flatness error does not exceed 0.05mm to prevent the valve body from deforming due to the protrusion of the installation surface, which will cause the valve core to be stuck or seal failure. The connecting screw is uniformly pressed and tightened symmetrically when fixing the connecting screw to avoid deformation of the valve body due to single-side stress. There was a case where the screw tightening force was uneven, resulting in a gap between the valve core and the valve body hole.