技術參數 Technical parameter 

由先導閥和主閥芯聯系形成通道組合而成動作可靠，間接開關，在有壓力的情況下正常工作 The combination of a channel formed by the connection between the pilot valve and the main valve core is reliable in action, with an indirect switch that operates normally under pressure

大通徑，多種密封形式可選 Large diameter, multiple sealing forms available

先導膜片式，低功率，適合長時間工作 Pilot diaphragm type, low power, suitable for long-term operation

工作原理

進口黃銅、不銹鋼先導膜片式電磁閥有常閉型和常開型二種 retz Imported brass and stainless steel pilot diaphragm solenoid valves are available in two types: normally closed and normally open

常閉型:在未通電時，呈關閉狀態。當線圈通電時，產生電磁力使動鐵芯和靜鐵芯吸合，導閥口打開，介質流向出口，此時主閥芯上腔的壓力減小，低于進口側的壓力，形成壓力差克服彈簧阻力而隨之向上運動，達到開啟主閥口的目的，介質流通。當線圈斷電時，電磁力消失，動鐵芯在彈簧力作用下復位關閉導閥口，此時介質從平衡孔流入，主閥芯上腔壓力增大，并在彈簧力作用下向下運動，關閉主閥口。

Normally closed: In a closed state when not powered on. When the coil is energized, electromagnetic force is generated to cause the moving iron core and the static iron core to engage. The pilot valve port opens, and the medium flows to the outlet. At this time, the pressure in the upper chamber of the main valve core decreases, lower than the pressure on the inlet side, forming a pressure difference that overcomes the resistance of the spring and moves upwards, achieving the purpose of opening the main valve port, and the medium flows. When the coil is powered off, the electromagnetic force disappears, and the moving iron core resets and closes the pilot valve port under the action of spring force. At this time, the medium flows into the balance hole, and the pressure in the upper chamber of the main valve core increases. Under the action of spring force, it moves downward to close the main valve port.

常開型:原理與常閉型正好相反

Normally open type: The principle is exactly opposite to that of normally closed type