Hits:Updated:2020-05-14 09:05:03【Print】
Electromagnetic pilot heads are widely used in the solenoid valve industry. Among them, high-pressure solenoid valves are divided into direct-acting and pilot-type structural principles. The three-dimensional sealing structure of the leading design can flexibly choose different sealing materials, and the valve can achieve zero leakage. High-pressure solenoid valves can be divided into brass solenoid valves and stainless steel solenoid valves according to their materials.
Structural features
Pilot diaphragm type, maximum pressure 50bar
Compact design, compact and beautiful, low temperature rise, no noise, zero leakage
Quick action response, high frequency, reliable quality
If the medium contains impurities, a filter must be installed in front of the valve (filter screen is greater than or equal to 80 mesh / cm2); and there is no solidification or crystal phenomenon.
working principle
Normally closed: when the coil is energized, the pilot spool is closed, the pilot hole is opened, the upper chamber of the valve is relieved of pressure, the piston is pushed by the medium pressure of the lower chamber, and the solenoid valve is opened; when the coil is powered off, the pilot spool is reset by the spring and the pilot The hole is closed, the upper cavity of the valve is pressurized by the piston orifice and the thrust of the return spring, the solenoid valve is closed.
Normally open: When the coil is energized, the pilot hole is closed, the upper cavity of the valve is pressurized by the piston orifice and the thrust of the return spring, the solenoid valve is closed. When the coil is de-energized, the pilot valve core is reset by the spring, the pilot hole is opened, the upper chamber of the valve is relieved of pressure, the piston is pushed by the medium pressure of the lower chamber, and the solenoid valve is opened.
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