格SMC直动式流体阀,SMC流体阀选型资料
SMC流体阀从原理上分为三大类：
1）SMC直动式流体阀：
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。
2）SMC分步直动式流体阀：
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。
3）SMC先导式流体阀：
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。
SMC流体阀选型资料主要是：
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；zui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。
电气选择
电压规格应尽量优先选用AC220V、DC24较为方便。
持续工作时间长短
常闭、常开、或可持续通电
①、当电磁阀需要长时间开启，并且持续的时间多余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。
环境要求选择辅助功能：防爆、止回、手动、防水雾、水淋、潜水
①、爆炸性环境：必须选用相应防爆等级的电磁阀（我公司现有：d II BT4、d II CT5、Ex m I/II T4） 。
②、当管内流体有倒流现象时，可选择止回功能电磁阀。
③、当需要对电磁阀进行现场人工操作时，可选择带手动功能电磁阀。
4、露天安装或粉尘多场合应选用防水，防尘品种（防护等级在IP54以上）。
5、用于喷泉必须采用潜水型电磁阀（防护等级在IP68以上）。
SMC直动式流体阀结构分为阀塞、外套、活动杆，通过线圈磁场启动副阀的同时带动主阀开启，由介于主阀的阀环将气压隔离形成上下两个的阀腔。在不同压力管道的工作原理解析如下，
在有压管道，当活动杆启动上阀腔由副阀进行排气，压力急速下降，下阀腔压力高于上阀腔便形成了压差，阀门即可打开。
在无压管道，当管道无压力或者压力低时，上阀腔与下阀腔基本无压差。阀门处于关闭状态，这时便由活动杆打开副阀同时带动主阀打开，由线圈直接启动，当然此时对线圈的要求比较高必须选用我公司定制的带强力磁性高温漆包线及能长期通电的特制线圈。
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格SMC直动式流体阀,SMC流体阀选型资料
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VX3114V-015GS1B
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VX3114V-01F-5DB
VX3114V-02-4G
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VX3134L-025TZ1B
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VX3134V-02-3GR1
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VX3134V-02-4G
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VX3134V-025DZ1B
VX3134V-02-5G
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VX3134V-025GS1B
VX3134V-02-5GSB
VX3135-00-4G
VX3135-00-4GR1
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VX3135-00-5G1
VX3135V-00-5G
VX3135V-00-5G1
格SMC直动式流体阀,SMC流体阀选型资料本页产品地址：http://www.geilan.com/sell/show-6317857.html
免责声明：以上所展示的[VX3335-00-5D1 直动式流体阀]信息由会员[东莞市科控工业自动化设备有限公司]自行提供，内容的真实性、准确性和合法性由发布会员负责。
