Airtac solenoid valve

The working principle of Yadeke solenoid valve

Yadeke Solenoid valve is a basic automation component used to control the direction of fluids. It is an actuator. It is usually used on mechanical controls and industrial valves to control the direction of the medium. , thereby achieving control of the valve switch.

Working Principle There is a closed cavity in the solenoid valve, with through holes at different positions. Each hole leads to a different oil pipe. There is a valve in the middle of the cavity and two electromagnets on both sides. Whichever side of the magnet coil is energized, the valve body will be attracted to that side. By controlling the movement of the valve body, different oil drain holes are blocked or leaked. The oil inlet hole is normally open, and the hydraulic oil will enter different drain holes. The oil pipe then pushes the piston of the oil cylinder through the pressure of the oil. The piston drives the piston rod, and the piston rod drives the mechanical device. In this way, the mechanical movement is controlled by controlling the current on and off of the electromagnet.

Yadeke Solenoid valves are divided into three categories in principle:

1 Direct-acting solenoid valve: Principle: When the power is turned on, the solenoid coil generates electromagnetic force to lift the closing member from the valve seat, and the valve opens;when the power is turned off, the electromagnetic force disappears and the spring handle closes The valve is pressed against the valve seat and the valve closes. Features: It can work normally under vacuum, negative pressure and zero pressure, but the diameter generally does not exceed 25mm.

2 Step-by-step direct-acting solenoid valve: Principle: It is a principle that combines direct-acting and pilot-operated. When there is no pressure difference between the inlet and outlet, after power is turned on, the electromagnetic force directly connects the pilot small valve and the main valve. The closing parts are lifted up in turn and the valve opens. When the inlet and outlet reach the starting pressure difference, after power is turned on, the electromagnetic force pilots the small valve. The pressure in the lower chamber of the main valve increases and the pressure in the upper chamber decreases, thereby using the pressure difference to push the main valve upward;when the power is turned off, the pilot valve uses the spring Force or medium pressure pushes the closing member to move downward to close the valve. Features: It can operate safely under zero pressure difference or vacuum or high pressure, but the power is large and it must be installed horizontally.

3 Pilot solenoid valve: Principle: When energized, the electromagnetic force opens the pilot hole, and the pressure in the upper chamber drops rapidly, forming an upper, lower, and higher pressure difference around the closing member. The fluid pressure pushes the closing member to move upward, and the valve opens. ;When the power is off, the spring force closes the pilot hole, and the inlet pressure passes through the bypass hole and quickly forms a pressure difference between the lower and upper chambers around the valve closing member. The fluid pressure pushes the closing member downward to close the valve. Features: The upper limit of the fluid pressure range is relatively high and can be installed arbitrarily (customization is required) but the fluid pressure difference condition must be met.

4. Solenoid valves are divided into six subcategories based on differences in valve structure, materials and principles: direct-acting diaphragm structure, step-by-step direct-acting diaphragm structure, pilot diaphragm structure, direct-acting diaphragm structure Piston structure, step direct acting piston structure, pilot piston structure.