PV7-17/16-30RE01MC0-08 PV7-17/16-30RE01MC0-08 PV7-17/16-30RE01MC0-08
PV7-17/16-30RE01MC0-08 PV7-17/16-30RE01MC0-08 PV7-17/16-30RE01MC0-08
PV7-17/16-30RE01MC0-08 PV7-17/16-30RE01MC0-08 PV7-17/16-30RE01MC0-08

主要分类  

1、电磁阀从原理上分为三大类：  rexroth泵PV7-1X/10-20RE01MC0-08

直动式电磁阀  

原理：通电时，电磁线圈产生电磁力把关闭件从阀座上提起，阀门打开；断电时，电磁力消失，弹簧把关闭件压在阀座上，阀门关闭。  

特点：在真空、负压、零压时能正常工作，但通径一般不超过25mm。  

分步直动式电磁阀  

原理：它是一种直动和先导式相结合的原理，当入口与出口没有压差时，通电后，电磁力直接把先导小阀和主阀关闭件依次向上提起，阀门打开。当入口与出口达到启动压差时，通电后，电磁力先导小阀，主阀下腔压力上升，上腔压力下降，从而利用压差把主阀向上推开；断电时，先导阀利用弹簧力或介质压力推动关闭件，向下移动，使阀门关闭。  

特点：在零压差或真空、高压时亦能可*动作，但功率较大，要求必须水平安装。  

先导式电磁阀  

原理：通电时，电磁力把先导孔打开，上腔室压力迅速下降，在关闭件周围形成上低下高的压差，流体压力推动关闭件向上移动，阀门打开；断电时，弹簧力把先导孔关闭，入口压力通过旁通孔迅速腔室在关阀件周围形成下低上高的压差，流体压力推动关闭件向下移动，关闭阀门。  

特点：流体压力范围上限较高，可任意安装（需定制）但必须满足流体压差条件。  

2、电磁阀从阀结构和材料上的不同与原理上的区别，分为六个分支小类：直动膜片结构、分步直动膜片结构、先导膜片结构、直动活塞结构、分步直动活塞结构、先导活塞结构。  

3、电磁阀按照功能分类：水用电磁阀、蒸汽电磁阀、制冷电磁阀、低温电磁阀、燃气电磁阀、消防电磁阀、氨用电磁阀、气体电磁阀、液体电磁阀、微型电磁阀、脉冲电磁阀、液压电磁阀常开电磁阀、油用电磁阀、直流电磁阀、高压电磁阀、防爆电磁阀等。  

 SAGINOMIYA鹭宫电磁阀

选型依据  

电磁阀选型首先应该依次遵循安全性，可靠性，适用性，经济性四大原则，其次是根据六个方面的现场工况（即管道参数、流体参数、压力参数、电气参数、动作方式、特殊要求进行选择）。  

 SAGINOMIYA鹭宫电磁阀

选型依据：  

1、根据管道参数选择电磁阀的：通径规格（即DN）、接口方式  

1）按照现场管道内径尺寸或流量要求来确定通径（DN）尺寸；  

2）接口方式，一般>DN50要选择法兰接口，≤DN50则可根据用户需要自由选择。  

2、根据流体参数选择电磁阀的：材质、温度组  

1）腐蚀性流体：宜选用耐腐蚀电磁阀和全不锈钢；食用超净流体：宜选用食品级不锈钢材质电磁阀；  

2）高温流体：要选择采用耐高温的电工材料和密封材料制造的电磁阀，而且要选择活塞式结构类型的；  

3）流体状态：大至有气态，液态或混合状态，特别是口径大于DN25时一定要区分开来；  

4）流体粘度：通常在50cSt以下可任意选择，若超过此值，则要选用高粘度电磁阀。

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