Two way two position solenoid valve Baode BURKERT 12490

Two way two position solenoid valve Baode BURKERT 12490

working principle
1. There are two types: normally closed and normally open. When the normally closed type is powered off, it is in a closed state. When the coil is energized, it generates electromagnetic force, which causes the moving iron core to overcome the spring force and directly open the valve by attracting the stationary iron core, and the medium is in a path; When the coil loses power, the electromagnetic force disappears, and the moving iron core resets under the action of the spring force, directly closing the valve port and preventing the medium from flowing. The structure is simple, the action is reliable, and it works normally under zero pressure difference and micro vacuum. The normally open type is exactly the opposite. For BURKERT solenoid valves with flow paths smaller than 6. The BURKERT solenoid valve adopts a combination of primary and secondary valve opening, and the main valve and pilot valve step by step open the main valve port directly by electromagnetic force and pressure difference. When the coil is energized, electromagnetic force is generated to attract the moving iron core and the stationary iron core, and the pilot valve port is opened. The pilot valve port is located on the main valve port, and the moving iron core is connected to the main valve core. At this time, the pressure in the upper chamber of the main valve is unloaded through the pilot valve port, and under the simultaneous action of pressure difference and electromagnetic force, the main valve core moves upward, opening the flow of the main valve medium. When the coil loses power, the electromagnetic force disappears. At this time, the moving iron core closes the pilot valve hole under the action of its own weight and spring force. At this time, the medium enters the upper chamber of the main valve core in the balance hole, causing the pressure in the upper chamber to rise. At this time, the main valve is closed under the action of spring reset and pressure, and the medium is cut off. Reasonable structure, reliable action, and reliable operation even under zero pressure difference. For example: 6013, 0124, 6012, etc.

2. The solenoid valve has a sealed chamber with through holes at different positions, each leading to a different oil pipe. The middle of the chamber is the valve, and there are two electromagnets on both sides. The magnetic coil on either side will attract the valve body to the other side. By controlling the movement of the valve body, different oil discharge holes can be blocked or leaked out. The oil inlet hole is normally open, and hydraulic oil will enter different oil discharge pipes. Then, the pressure of the oil will push the piston of the cylinder, which in turn drives the piston rod, which in turn drives the mechanical device to move. In this way, the mechanical motion is controlled by controlling the current of the electromagnet.

4、 Electromagnetic valves can be divided into three main categories based on their principles
1. Direct acting solenoid valve
Principle: When powered on, the electromagnetic coil generates electromagnetic force to lift the closing member from the valve seat, and the valve opens; When the power is cut off, the electromagnetic force disappears, and the spring presses the closing member against the valve seat, causing the valve to close. Characteristics: It can work normally under vacuum, negative pressure, and zero pressure, but the diameter generally does not exceed 25mm.

2. Distributed direct acting solenoid valve
Principle: It is a combination of direct action and pilot operated principle. When there is no pressure difference between the inlet and outlet, after being energized, the electromagnetic force directly lifts the pilot small valve and the main valve closing member upward in sequence, and the valve opens. When the inlet and outlet reach the starting pressure difference, after being energized, the electromagnetic force pilot small valve, the lower chamber pressure of the main valve rises, and the upper chamber pressure drops, thereby using the pressure difference to push the main valve upwards; When the power is cut off, the pilot valve uses spring force or medium pressure to push the closing member downwards, causing the valve to close.
Features: It can also operate under zero pressure difference, vacuum, and high pressure, but with high power, it must be installed horizontally.

3. Pilot operated solenoid valve
Principle: When powered on, the electromagnetic force opens the pilot hole, causing the pressure in the upper chamber to rapidly decrease, creating a pressure difference of high and low around the closing element. The fluid pressure pushes the closing element to move upward, and the valve opens; When the power is cut off, the spring force closes the pilot hole, and the inlet pressure quickly forms a lower and higher pressure difference around the closing valve through the bypass hole. The fluid pressure pushes the closing valve to move downward and close the valve.
Features: The upper limit of the fluid pressure range is relatively high, and it can be installed freely (customized), but it must meet the fluid pressure difference conditions.

4. Electromagnetic valves can be divided into six sub categories based on differences in valve structure, materials, and principles: direct acting diaphragm structure, step-by-step heavy plate structure, pilot diaphragm structure, direct acting piston structure, step-by-step direct acting piston structure, and pilot piston structure.

Two way two position solenoid valve Baode BURKERT 12490