点击图片查看原图电磁阀是由电磁线圈和磁芯组成，是包含一个或几个孔的阀体。当线圈通电或断电时，磁芯的运转将导致流体通过阀体或被切断，以达到改变流体方向的目的。电磁阀的电磁部件由固定铁芯、动铁芯、线圈等部件组成；阀体部分由滑阀芯、滑阀套、弹簧底座等组成。电磁线圈被直接安装在阀体上，阀体被封闭在密封管中，构成一个简洁、紧凑的组合。
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(http://www.maoyihang.com/invest/l_193/)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(http://www.maoyihang.com/invest/l_186/)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*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。
3、根据压力参数选择电磁阀的：原理和结构品种
1）公称压力：这个参数与其它通用阀门的含义是一样的，是根据管道公称压力来定；
2）工作压力：如果工作压力低则必须选用直动或分步直动式原理；*低工作压差在0.04Mpa以上时直动式、分步直动式、先导式均可选用。
4、电气(http://www.maoyihang.com/invest/l_186/)选择：电压规格应尽量优先选用AC220V、DC24较为方便。
力士乐电磁阀库存产品(http://www.maoyihang.com/invest/)型号
NG6电磁换向阀4/2 4WE6D62/EW230N9K4 41
NG6电磁换向阀4/2 4WE6Y62/EW230N9K4 42
NG6电磁换向阀4/3 4WE6E62/EW230N9K4 62
NG6电磁换向阀4/3 4WE6J62/EW230N9K4 82
NG6电磁换向阀4/3 4WE6G62/EW230N9K4 25
NG6电磁换向阀4/2 4WE6D61/EW230NZ4/V 54
NG6电磁换向阀4/2 4WE6D62/EW110N9K4（改线圈） 10
NG6电磁换向阀4/2 4WE6E62/EW110N9K4（改线圈）
NG6电磁换向阀4/2 4WE6J62/EW110N9K4（改线圈）
NG6电磁换向阀4/3 4WE6G62/EW110N9K4
NG6电磁换向阀4/3 4WE6R73-6X/EG24N9K4/A12 10
NG6电磁换向阀4/2 4WE6D53/OFAW110N-50N24 12
NG10电磁换向阀4/2 4WE10D3X/CG24N9K4 78
NG10电磁换向阀4/2 4WE10EA3X/CG24N9K4 63
NG10电磁换向阀4/2 4WE10EB3X/CG24N9K4 64
NG10电磁换向阀4/2 4WE10Y3X/CG24N9K4 68
NG10电磁换向阀4/3 4WE10E3X/CG24N9K4 46
NG10电磁换向阀4/3 4WE10J3X/CG24N9K4 51
NG10电磁换向阀4/3 4WE10L3X/CG24N9K4 14
NG10电磁换向阀4/3 4WE10U3X/CG24N9K4 16
NG10电磁换向阀4/2 4WE10C3X/CG24N9K4 19
NG10电磁换向阀4/3 4WE10G3X/CG24N9K4 17
NG10电磁换向阀4/3 4WE10H3X/CG24N9K4 16
NG10电磁换向阀4/2 4WE10D3X/CW230N9K4 34
NG10电磁换向阀4/3 4WE10E3X/CW230N9K4 41
NG10电磁换向阀4/3 4WE10J3X/CW230N9K4 47
NG10电磁换向阀4/3 4WE10G3X/CW230N9K4 46
NG10电磁换向阀4/3 4WE10H3X/CW230N9K4 41
NG10电磁换向阀4/2 4WE10D3X/CW110N9K4（改线圈） 8
NG10电磁换向阀4/2 4WE10H3X/CW110N9K4（改线圈） 8
NG16电液换向阀4/2 4WEH16C7X/6HG24N9K4 21
NG16电液换向阀4/2 4WEH16EA7X/6HG24N9K4 27
NG16电液换向阀4/2 4WEH16Y31-7X/6HG24N9K4 24
NG16电液换向阀4/2 4WEH16D7X/6HG24N9K4 26
NG16电液换向阀4/3 4WEH16E/6HG24N9ETK4 21
NG16电液换向阀4/3 4WEH16J/6HG24N9ETK4 20
NG16电液换向阀4/3 4WEH16L/6HG24N9ETK4 22
NG16电液换向阀4/3 4WEH16U/6HG24N9ETK4 25
NG16电液换向阀4/2 4WEH16D7X/6EG24N9ETK4 26
NG16电液换向阀4/2 4WEH16EA7X/6EG24N9ETK4 17
NG16电液换向阀4/2 4WEH16EB7X/6EG24N9ETK4 22
NG16电液换向阀4/3 4WEH16E7X/6EG24N9ETK4 19
NG16电液换向阀4/3 4WEH16J7X/6EG24N9ETK4 15
电动阀与电磁阀的区别
电磁阀是电磁线圈通电后产生磁力吸引克服弹簧的压力带动阀芯动作，就一电磁线圈，结构简单，价格便宜，只能实现开关；
电动阀是通过电动机驱动阀杆，带动阀芯动作，电动阀又分（关断阀）和调节阀。关断阀是两位式的工作即全开和全关，调节阀是在上面安装电动阀门定位器，通过闭环调节来使阀门动态的稳定在一个位置上。
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