Direct Lifting Diaphragm Solenoid Valve

Introduction:

This kind of valve is connected by one-time and two-time opening. The main valve and the guide valve step by step make the electromagnetic force and pressure difference open the main valve mouth directly. When the coil is electrified, electromagnetic force is produced to make the moving iron core and the static iron core suck together. The guide valve opening is set on the main valve opening, and the moving iron core is connected with the main valve core. At this time, the pressure of the upper chamber of the main valve is unloaded through the guide valve opening. Under the simultaneous action of pressure difference and electromagnetic force, the main valve core moves upward and the medium current of the main valve is opened. Tong. When the coil is cut off, the electromagnetic force disappears. At this time, the guide valve hole is closed by the action of self-weight and spring force. At this time, the medium enters the upper chamber of the main valve core in the balance hole, which increases the pressure of the upper chamber. 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 at zero differential pressure. For example: ZQDF, ZS, 2W, etc.

Principle:

It is a combination of direct and pilot principle. When there is no pressure difference between the inlet and the outlet, the electromagnetic force directly lifts the pilot valve and the main valve closure in turn, and the valve opens. When the inlet and outlet reach the start-up pressure difference, after electrification, the electromagnetic force leads the small valve, the lower chamber pressure of the main valve rises, and the upper chamber pressure decreases, so that the main valve is pushed upward by the pressure difference; when power is cut off, the pilot valve uses spring force or medium pressure to push the closing parts downward, so that the valve closes.

Characteristic:

It can also be operated at zero pressure difference or vacuum or high voltage, but with high power, it is required to be installed horizontally.