ATOS SDHI Series Hydraulic Electromagnetic Commutation Valve Direction Solenoid Relief Valve SDHI-0710 SDHI-0711 SDHI-0712

Features: low power consumption, large diameter, simple structure, arbitrary installation direction, but can only be used where there is a certain pressure difference at both ends of the solenoid valve. The solenoid valve is a control element widely used in the aerospace field. A pilot operated two-way solenoid valve is a two position five way structure with two normally open and normally closed chambers. It switches the opening and closing of downstream gas equipment through gas flow. Due to the complexity of the internal structure and gas path of the solenoid valve, it is found that different experiences of the same solenoid valve show different pressure building processes. As the pressure build-up pressure (without special instructions, the pressure in this article refers to gauge pressure) and pressure build-up time of the normally open and closed chambers of the solenoid valve may have a great impact on downstream gas equipment, it is necessary to conduct in-depth analysis. The pilot operated two-way solenoid valve is mainly composed of valve body, normally closed main valve flap, normally open main valve flap, pilot valve flap, electromagnet and other parts. The main valve clack and piston are connected by the ejector rod, which is characterized by no spring and other elastic return elements inside. The air channels are switched completely by pneumatic and electromagnetic forces to control the air supply and sealing of the normally open and closed cavities. The maximum working pressure is 5.0MPa

When the electromagnet is in the power off state, the inlet gas is divided into two paths, one directly acts on the normally open main valve flap to open it, the solenoid valve normally open chamber B supplies air, and the other acts on the pilot valve flap, and enters the normally closed control chamber F along the gas channel to seal the normally closed main valve flap. When the solenoid is energized, the pilot valve clack is closed, the gas in the normally closed control chamber F is discharged into the atmosphere from the vent port D, the normally closed control chamber F is depressurized, the normally closed main valve clack is opened, the normally closed chamber C of the solenoid valve is supplied with air, and the gas also enters the normally open control chamber E along the gas channel, compressing and sealing the normally open main valve clack

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