The working principle of the solenoid valve

                                The working principle of the solenoid valve

Throughout the solenoid valve at home and abroad, so far, from the mode of action can be divided into three categories: direct acting, recoil, the forerunner, and from the disc structure and material of different and the difference on the principle of recoil type can be divided into: diaphragm recoil electromagnetic valve, electromagnetic valve piston recoil; Guiding type can be divided into: pilot operated diaphragm solenoid valve, the guide piston solenoid valve; Points from the seat and the sealing material and can be divided into: soft seal solenoid valve, electromagnetic valve seal rigidity, semi-rigid sealed electromagnetic valve.

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& E1 ` 7 ~ 9 l % _ a _ + W *, direct acting solenoid valve: r/I I $v; O8 P0 F
Principle: direct acting solenoid valve normally closed type power, the electromagnetic coil electromagnetic suction lift valve core, make close thing away open seat seal open; Power, the electromagnetic force disappears, rely on the spring force closure member pressure on the valve seat valve closed. (normally open to the contrary)
2 u8 f4 t $J0 t C5 p characteristics: in a vacuum, negative pressure, can work normally when the zero pressure difference, (the following can be installed arbitrarily, but electric magnetic head larger. Such as my company introduction of HERION technology production of direct acting solenoid valve can be used in the 1.33 x 10-4 Mpa vacuum. 6 V. C ': O F - q1 F
Second, recoil type solenoid valve 8 e $u) y ({9 w1 C + J
The principle of principle: it is a direct acting and pilot, the combination of electric, solenoid valve and auxiliary valve first opened, the main valve inferior vena pressure is greater than on cavity pressure and the use of differential pressure and solenoid valve open valve function at the same time; Power cuts, auxiliary valve using the spring force or medium pressure push off, move down the valve closed. : (I); C + + p# Z1 L I/b
Feature: when in zero pressure difference or high pressure can also be reliable work, but the power and volume is larger, for vertical installation.
0 ~! Z, j8 G; P + Z1 p! L; Three, guiding type solenoid valve 7 | t & Y + P0 T1 b. {7 I: U! W
Principle: when electrified, the electromagnetic drive pilot valve to open the pilot valve, main valve cavity pressure drops rapidly, formed in the inferior vena differential pressure on the main valve, depend on medium pressure to promote the main valve closed up, open valve. Power outages, the pilot valve is shut, spring force medium entrance pressure through the guide hole quickly into the main valve cavity formed in the cavity pressure difference, so that the main valve to close. F2 Y $5 m; Q | 6 n8 i. {6 w
Features: small volume, low power, but the limited scope of medium pressure difference, must satisfy the differential conditions. K5 + X * U1 I# J "z; Q $b / `
Both the 3-way magnet valve (usually with single-acting pneumatic actuators, two is two position control, on-off, tee, there are three channels ventilation in general a channel connected with gas source, the other two channel 1 connected to the inlet of the actuator, one connected to the actuator vent, the working principle of specific can consult the single-acting pneumatic actuators