Step direct acting solenoid valve

Step direct acting solenoid valve
Principle: It is a principle that combines direct action and pilot operation. When there is no pressure difference between the inlet and outlet, after power is turned on, the electromagnetic force directly lifts the pilot small valve and main valve closing parts upward in sequence, 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.