5795900620安沃驰阀组电磁阀

武汉百士自动化设备有限公司专注于液压、气动、工控自动化备件销售，热诚欢迎新老客户咨询购买！

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）。

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。

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、电气选择：电压规格应尽量优先选用AC220V、DC24较为方便。

5、根据持续工作时间长短来选择：常闭、常开、或可持续通电

1）当电磁阀需要长时间开启，并且持续的时间多于关闭的时间应选 用常开型；

2）要是开启的时间短或开和关的时间不多时，则选常闭型；

3）但是有些用于安全保护的工况，如炉、窑火焰监测，则不能选常开的，应选可长期通电型。

6、根据环境要求选择辅助功能：防爆、止回、手动、防水雾、水淋、潜水。

选型原则

安全性：

1、腐蚀性介质：宜选用塑料王电磁阀和全不锈钢；对于强腐蚀的介 质必须选用隔离膜片式。中性介质，也宜选用铜合金为阀壳材料的电磁阀，否则，阀壳中常有锈屑脱落，尤其是动作不频繁的场合。氨用阀则不能采用铜材。

2、爆开性环境：必须选用相应防爆等级产品，露天安装或粉尘多场合应选用防水，防尘品种。

3、电磁阀公称压力应超过管内高工作压力。

适用性：

1、介质特性

1）质气，液态或混合状态分别选用不同品种的电磁阀；

2）介质温度不同规格产品，否则线圈会烧掉，密封件老化，严重影响寿命命；

3）介质粘度，通常在50cSt以下。若超过此值，通径大于15mm时，用多功能电磁阀；通径小于15mm时，用高粘度电磁阀。

4）介质清洁度不高时都应在电磁阀前配装反冲过滤阀，压力低时，可选用直动膜片式电磁阀；

5）介质若是定向流通，且不允许倒流，需用双向流通；

6）介质温度应选在电磁阀允许范围之内。

2、管道参数

1）根据介质流向要求及管道连接方式选择阀门通口及型号；

2）根据流量和阀门Kv值选定公称通径，也可选同管道内径；

3）工作压差：低工作压差在0.04Mpa以上是可选用间接先导式；低工作压差接近或小于零的必须选用直动式或分步直接式。

3、环境条件

1）环境的高和低温度应选在允许范围之内；

2）环境中相对湿度高及有水滴雨淋等场合，应选防水电磁阀；

3）环境中经常有振动，颠簸和冲击等场合应选特殊品种，例如船用电磁阀；

4）在有腐蚀性或爆开性环境中的使用应优先根据安全性要求选用耐发蚀型；

5）环境空间若受限制，需选用多功能电磁阀，因其省去了旁路及三只手动阀且便于在线维修。

4、电源条件

1）根据供电电源种类，分别选用交流和直流电磁阀。一般来说交流电源取用方便；

2）电压规格用尽量优先选用AC220V.DC24V；

3）电源电压波动通常交流选用 %10%.-15%，直流允许±%10左右，如若超差，须采取稳压措施；

4）应根据电源容量选择额定电流和消耗功率。须注意交流起动时VA值较高，在容量不足时应优先选用间接导式电磁阀。

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