品牌：RETZ瑞茨/我們一直致力于流體控制領域的持續創新，始于2005……進口分步直動式電磁閥是一種直動式和先導式相結合的原理，結構分為活塞式和膜片式，適于用氣、水、油、蒸汽、燃氣、腐蝕性流體的控制The imported step-by-step direct acting solenoid valve is a combination of direct acting and pilot operated principles, with a structure divided into piston type and diaphragm type, suitable for controlling gas, water, oil, steam, gas, and corrosive fluids
工作原理
常閉：當線圈通電時，電磁力先打開先導孔，主閥活塞上腔壓力下降，從而利用壓差和電磁力吸動先導閥芯連動主活塞，電磁閥打開。 當線圈斷電時，靠彈簧復位關閉先導孔，主活塞上腔增壓，推動主活塞向下移動，電磁閥關閉。
Normally closed: When the coil is energized, the electromagnetic force first opens the pilot hole, causing the pressure in the upper chamber of the main valve piston to decrease. Therefore, the pressure difference and electromagnetic force are used to attract the pilot valve core and connect the main piston, causing the electromagnetic valve to open. When the coil is powered off, the pilot hole is closed by spring reset, and the upper chamber of the main piston is pressurized, pushing the main piston to move downwards, and the solenoid valve is closed.
常開：常開與常閉相反 Normally open: The opposite of normally open and normally closed
選型參數范圍Selection parameter range：
產品規格：DN25-DN200 （中大口徑）
閥體材質：鑄鐵、不銹鋼304、316。（鑄鐵不能用在腐蝕流體上）
適用介質：氣、水、油、蒸汽、燃氣、腐蝕性流體。
介質溫度：0-100-300℃。
介質粘度：小于50CSt （大于50時需定制）。
防護性能：防水、防爆（Exd IICT5）、防腐。
閥芯材質： 均為不銹鋼。
接線方式：接線座式、引線式、插頭式。
控制方式：常閉。
電源電壓：DC12~127V；AC36~380V。
連接方式：內螺紋、法蘭、(外螺紋和特殊接口可定做或加轉接頭)
泄 漏 量：零
備注：特殊型可定制。
注：出口端壓力大于進口端壓力時，介質會反向導通。可安裝止回閥或訂制帶止回功能的電磁閥