CML WH42-G02-B3-D24-N WE42 B2 B11B B8 D2 A110 A220 A240 WH42-G02-B{{14 }}D24-N方向弁
CML solenoid valve WH42-G02-B2A-A220-20 is a step by step direct action type, which can complete the electromagnetic control at the same time, and can have a greater impact on the overall working state of the pipeline. Moreover, the use of vacuum solenoid valve can effectively prevent the impact of other irrelevant elements on the pipeline, so as to make the correct working state of the pipeline. When the vacuum solenoid valve is installed on the mechanical vacuum pump, the valve and the pump are connected to the same power supply, and the opening and closing of the pump directly control the opening and closing of the valve. When the pump stops working or the power supply suddenly becomes intertwined, the valve can automatically fill the vacuum * * * and the air inlet passing through the pump into the pump chamber to prevent the pump oil from flowing back to pollute the vacuum. Looking at the external solenoid valves, up to now, they can be divided into three categories, namely, direct action type, recoil type and pilot type, while from the differences in valve flap structure, data and principle, the reverse type can be divided into: diaphragm type recoil solenoid valve and type recoil solenoid valve; The pilot type can also be divided into: pilot type diaphragm solenoid valve, pilot type solenoid valve; From the valve seat and sealing data, it can also be divided into soft sealing solenoid valve, rigid sealing solenoid valve and semi rigid sealing solenoid valve. 1, Principle of direct acting solenoid valve: when the normally closed direct acting solenoid valve is energized, the solenoid coil generates electromagnetic attraction to lift the valve core, so that the closing part can be turned away from the remote opening valve seat sealing pair; When the power is cut off, the electromagnetic force disappears, and the valve is closed by pressing the closing element on the valve seat with spring force. (The normally open type is the opposite) Characteristics: it can work normally under vacuum, negative pressure and zero differential pressure. It can be installed arbitrarily below dn50, but the electromagnetic head has a large volume. For example, the direct acting solenoid valve imported from heri0n can be used for 1.33>10-4mpa真空
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