RETZ工业/美国瑞茨，我们一直致力于流体控制领域的持续创新，始于2005……零压启动电磁阀亦称之为无压差电磁阀、分步直动式电磁阀，是直动式与先导式结合的一种阀，通常用于中、大口径，工作压力零至低压力的管道系统中Retz zero pressure start solenoid valve, also known as no pressure difference solenoid valve or step-by-step direct action solenoid valve, is a type of valve that combines direct action and pilot type. It is usually used in medium and large caliber pipeline systems with zero to low working pressure

进口零压启动电磁阀工作原理--

常闭式：当线圈通电时，电磁力先打开先导孔，主阀活塞上腔压力下降，从而利用压差和电磁力吸动先导阀芯连动主活塞，阀口打开；断电时，靠弹簧复位关闭先导孔，主活塞上腔增压，推动主活塞向下移动，阀关闭。

Normally closed type: 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, opening the valve port; When the power is cut 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 valve is closed

常开式：与常闭式相反

Normally open: opposite to normally closed

进口零压启动电磁阀结构特点--

有活塞式结构和膜片式结构

零压启动、低压结合，性能稳定

塑封线圈，提高阀的可靠性并能防水、防潮，不易烧毁，线圈不易烧毁

线圈启动阀芯同时拉动活塞，在零压时都能正常工作;

长时间停止动作重新启动，动作同样灵敏，使用寿命长

进口零压启动电磁阀选型参数--

阀体材质：黄铜或不锈钢

接口尺寸：G1/8-G1 "或F1/2-F4"

工作压力：0-1.6MPa

适用介质：中性，气态或液态流体

介质粘度：≤21mm2/s

介质温度：-10~+80℃(+350℃,可选)

环境温度：-10~+50℃

密封材质：NBR(标准)，FPM、EPDM(可选)

标准电压: AC:220V(50/60Hz) DC:24V

防护性能：防水、防爆（DⅡCT5、ExdⅡCT5、ExmbⅡCT4、ExdⅡCT4）、防腐。

防护等级：IP67、IP65