Principle of Italian ATOS solenoid valve DHI series

Principle of ATOS solenoid valve DHI series

The principle of ATOS solenoid valve: When powered on, the electromagnetic force opens the pilot hole, and the pressure in the upper chamber rapidly drops, forming a high and low pressure difference around the closing member. The fluid pressure pushes the closing member 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.

Selection criteria for ATOS solenoid valve:

1. Select the solenoid valve based on pipeline parameters: diameter specification (i.e. DN), interface method

1) Determine the diameter (DN) size according to the on-site pipeline inner diameter size or flow requirements;

2) Interface method, generally>DN50 requires flange interface, ≤ DN50 can be freely selected according to user needs.

2. Select the material and temperature group of the solenoid valve based on fluid parameters

1) Corrosive fluids: corrosion-resistant solenoid valves and all stainless steel should be selected; Edible ultra clean fluid: It is recommended to use food grade stainless steel solenoid valves;

2) High temperature fluid: It is necessary to choose electromagnetic valves made of high-temperature resistant electrical materials and sealing materials, and to choose piston type structures;

3) Fluid state: up to gaseous, liquid, or mixed state, especially when the diameter is greater than DN25, it must be distinguished;

4) Fluid viscosity: Usually below 50cSt, it can be freely selected. If it exceeds this value, a high viscosity solenoid valve should be used.

DHI-0612/A-X 24DC

DHI-0613/A-X 24DC 23

DHI-0613/WP-X 230AC

DHI-0613-X 230/50/60AC

DHI-0613-X 24DC

DHI-0751/2/WP-X 24DC

DHI-0751/2-X 110/50/60AC 23

DHI-0751/2-X 230/50/60AC

DHI-0751/2-X 24DC

DHI-0630/2/A-X 24DC 20

DHI-0631/2/A-X 24DC 20

DHI-0631/2/L1-X 24DC 20

DHI-0631/2-X 24DC

DHI-0639/O-X 24DC 20

DHI-0710-X 24DC 20

DHI-0711-X 24DC

DHI-0713-X 24DC 20

DHI-07191-X 24DC

DHI-0750/2-X 24DC 20

ATOS solenoid valve is an industrial equipment controlled by electromagnetic force, which is an automation basic component used to control fluids. It belongs to actuators and is not limited to hydraulic and pneumatic systems. It is used in industrial control system to adjust the direction, flow, speed and other parameters of medium. Electromagnetic valves can be used in conjunction with different circuits to achieve the desired control, while ensuring the accuracy and flexibility of the control. There are many types of solenoid valves, and different solenoid valves play a role in different positions of the control system. Commonly used ones are one-way valves, safety valves, directional control valves, speed regulating valves, etc.

ATOS solenoid valve is composed of an electromagnetic coil and a magnetic core, and is a valve body containing one or several holes. When the coil is powered on or off, the operation of the magnetic core will cause the fluid to pass through the valve body or be cut off, in order to change the direction of the fluid. The electromagnetic components of the solenoid valve consist of a fixed iron core, a moving iron core, coils, and other components; The valve body is composed of slide valve core, slide valve sleeve, spring base, etc. The electromagnetic coil is directly installed on the valve body, which is enclosed in a sealed tube, forming a simple and compact combination. The solenoid valves we commonly use in production include two position three-way, two position four-way, two position five way, etc. Let's first talk about the meanings of the two: for solenoid valves, it means being energized or de energized, and for the valves being controlled, it means being open or closed.

The malfunction of ATOS solenoid valve will directly affect the operation of switching valve and regulating valve. Common faults include the solenoid valve not operating, and should be investigated from the following aspects:

1. If the ATOS solenoid valve wiring head is loose or the wire head falls off, the solenoid valve cannot be powered, and the wire head can be tightened.

2. The ATOS solenoid valve coil is burnt out. The wiring of the solenoid valve can be removed and measured with a multimeter. If there is an open circuit, the solenoid valve coil is burnt out. The reason is that the coil is damp, causing poor insulation and magnetic leakage, resulting in excessive current inside the coil and burning out. Therefore, it is necessary to prevent rainwater from entering the solenoid valve. In addition, if the spring is too hard, the reaction force is too large, the number of turns in the coil is too small, and the suction force is not enough, it can also cause the coil to burn out. When dealing with emergencies, the manual button on the coil can be moved from the "0" position during normal operation to the "1" position to open the valve.

3. ATOS solenoid valve stuck: The clearance between the slide valve sleeve and the valve core of the solenoid valve is very small (less than 0.008mm), usually assembled as a single piece. When mechanical impurities are introduced or there is too little lubricating oil, it is easy to get stuck. The processing method can be to insert a steel wire through the small hole in the head and make it bounce back. The fundamental solution is to remove the solenoid valve, take out the valve core and core sleeve, clean them with CCI4, and make the valve core move flexibly inside the valve sleeve. When disassembling, attention should be paid to the assembly sequence and external wiring position of each component, in order to reassemble and wire correctly. It is also necessary to check whether the oil mist spray hole is blocked and whether the lubricating oil is sufficient.

4. Leakage: Leakage can cause insufficient air pressure, making it difficult to open and close the forced valve. The reason is that the sealing gasket is damaged or the slide valve is worn, causing several cavities to blow air. When dealing with electromagnetic valve faults in the switching system, an appropriate timing should be chosen to handle them when the solenoid valve is in a power-off state. If the problem cannot be resolved within a switching gap, the switching system can be paused and handled calmly.