(1) 了解工作流(liu)(liu)体(ti)(ti)(ti)的(de)性(xing)质 应(ying)(ying)根据介质的(de)特性(xing)选择相应(ying)(ying)的(de)电(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)，如用于水和用于蒸汽的(de)电(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)就(jiu)不相同。流(liu)(liu)体(ti)(ti)(ti)性(xing)质包(bao)括：温(wen)度(du)、压力、粘度(du)、腐蚀性(xing)等；温(wen)度(du)高(gao)(gao)的(de)流(liu)(liu)体(ti)(ti)(ti)，就(jiu)不能使(shi)用常(chang)温(wen)电(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)，否则其使(shi)用寿命将大(da)大(da)缩短，严重时(shi)甚至会(hui)损坏。当管(guan)道中(zhong)流(liu)(liu)体(ti)(ti)(ti)含有(you)微粒(li)等杂质时(shi)，应(ying)(ying)选用膜片式电(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)。电(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)允许液体(ti)(ti)(ti)粘度(du)一般(ban)在(zai)20mm2／S以下，大(da)于50mm2／S时(shi)应(ying)(ying)专门订货。电(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)对流(liu)(liu)体(ti)(ti)(ti)的(de)清洁度(du)要求较高(gao)(gao)，流(liu)(liu)体(ti)(ti)(ti)清洁度(du)不高(gao)(gao)时(shi)可在(zai)电(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)前安装过滤(lv)器。

(2）搞(gao)清工(gong)(gong)作(zuo)(zuo)(zuo)流(liu)体(ti)(ti)的(de)(de)(de)(de)(de)压(ya)(ya)(ya)力(li)和流(liu)量(liang) 选(xuan)择(ze)的(de)(de)(de)(de)(de)电(dian)(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)(fa)额定工(gong)(gong)作(zuo)(zuo)(zuo)压(ya)(ya)(ya)力(li)太高(gao)，会(hui)增(zeng)加投资；但选(xuan)择(ze)的(de)(de)(de)(de)(de)额定工(gong)(gong)作(zuo)(zuo)(zuo)压(ya)(ya)(ya)力(li)太低，或接近(jin)实(shi)际(ji)的(de)(de)(de)(de)(de)介质(zhi)(zhi)压(ya)(ya)(ya)力(li)，在工(gong)(gong)作(zuo)(zuo)(zuo)中电(dian)(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)(fa)因材料的(de)(de)(de)(de)(de)强度不够，会(hui)造成(cheng)事(shi)故。除(chu)安全(quan)问(wen)题外(wai)，工(gong)(gong)作(zuo)(zuo)(zuo)压(ya)(ya)(ya)力(li)的(de)(de)(de)(de)(de)选(xuan)择(ze)还与电(dian)(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)(fa)能(neng)否(fou)正常(chang)(chang)工(gong)(gong)作(zuo)(zuo)(zuo)有关(guan)。工(gong)(gong)作(zuo)(zuo)(zuo)压(ya)(ya)(ya)力(li)一(yi)般用最(zui)高(gao)与最(zui)低的(de)(de)(de)(de)(de)上、下(xia)限来确定它的(de)(de)(de)(de)(de)可(ke)靠(kao)工(gong)(gong)作(zuo)(zuo)(zuo)范围。否(fou)则电(dian)(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)(fa)受介质(zhi)(zhi)压(ya)(ya)(ya)力(li)的(de)(de)(de)(de)(de)影(ying)响将无法(fa)可(ke)靠(kao)工(gong)(gong)作(zuo)(zuo)(zuo)。 流(liu)体(ti)(ti)流(liu)量(liang)大小关(guan)系(xi)到(dao)电(dian)(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)(fa)的(de)(de)(de)(de)(de)通径(jing)或阀(fa)(fa)(fa)座尺寸。电(dian)(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)(fa)口(kou)径(jing)选(xuan)择(ze)过大会(hui)造成(cheng)经济(ji)上的(de)(de)(de)(de)(de)浪费；如果(guo)口(kou)径(jing)选(xuan)小了又(you)会(hui)限制管道(dao)中应通过的(de)(de)(de)(de)(de)流(liu)量(liang)，而造成(cheng)较大的(de)(de)(de)(de)(de)压(ya)(ya)(ya)力(li)损(sun)失，使得系(xi)统(tong)的(de)(de)(de)(de)(de)控制作(zuo)(zuo)(zuo)用减小，使系(xi)统(tong)的(de)(de)(de)(de)(de)控制精度下(xia)降或失控。 工(gong)(gong)作(zuo)(zuo)(zuo)压(ya)(ya)(ya)差是(shi)指电(dian)(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)(fa)能(neng)可(ke)靠(kao)开、关(guan)的(de)(de)(de)(de)(de)阀(fa)(fa)(fa)入口(kou)与出口(kou)间的(de)(de)(de)(de)(de)压(ya)(ya)(ya)力(li)差，也是(shi)电(dian)(dian)(dian)磁(ci)(ci)(ci)阀(fa)(fa)(fa)能(neng)否(fou)正常(chang)(chang)工(gong)(gong)作(zuo)(zuo)(zuo)的(de)(de)(de)(de)(de)关(guan)键，是(shi)选(xuan)择(ze)时首要(yao)考虑的(de)(de)(de)(de)(de)问(wen)题。

(3）要重视环(huan)(huan)(huan)境条件(jian) 电(dian)(dian)(dian)磁阀(fa)(fa)(fa)的(de)(de)使(shi)用(yong)温度(du)过高则(ze)寿命(ming)将下降，最高温度(du)不(bu)能(neng)超过电(dian)(dian)(dian)磁阀(fa)(fa)(fa)铭(ming)牌所示。环(huan)(huan)(huan)境温度(du)太低(di)，会引起电(dian)(dian)(dian)磁阀(fa)(fa)(fa)外壳(qiao)结霜，会使(shi)密(mi)封(feng)填料等出现问题，使(shi)电(dian)(dian)(dian)磁阀(fa)(fa)(fa)不(bu)能(neng)正常(chang)工作。 湿度(du)会影(ying)响(xiang)电(dian)(dian)(dian)气绝缘性(xing)，潮湿的(de)(de)环(huan)(huan)(huan)境会使(shi)电(dian)(dian)(dian)气绝缘下降，影(ying)响(xiang)到电(dian)(dian)(dian)磁阀(fa)(fa)(fa)的(de)(de)可(ke)靠(kao)性(xing)。使(shi)用(yong)环(huan)(huan)(huan)境有灰尘、水滴、盐雾、腐(fu)蚀(shi)性(xing)气氛时，应选择密(mi)封(feng)性(xing)好的(de)(de)产品，如防水型(xing)(xing)(xing)、防溅型(xing)(xing)(xing)、防尘型(xing)(xing)(xing)电(dian)(dian)(dian)磁阀(fa)(fa)(fa)。要求防爆应选择防爆型(xing)(xing)(xing)电(dian)(dian)(dian)磁阀(fa)(fa)(fa)。在有振动、冲击(ji)的(de)(de)环(huan)(huan)(huan)境则(ze)应选择耐振型(xing)(xing)(xing)电(dian)(dian)(dian)磁阀(fa)(fa)(fa)。

(4) 工作(zuo)电(dian)(dian)(dian)(dian)源(yuan)(yuan)的(de)选择 电(dian)(dian)(dian)(dian)磁(ci)(ci)阀(fa)(fa)的(de)工作(zuo)电(dian)(dian)(dian)(dian)源(yuan)(yuan)有直(zhi)流(liu)和交(jiao)流(liu)之分，直(zhi)流(liu)电(dian)(dian)(dian)(dian)磁(ci)(ci)阀(fa)(fa)接入了(le)交(jiao)流(liu)电(dian)(dian)(dian)(dian)源(yuan)(yuan)，电(dian)(dian)(dian)(dian)磁(ci)(ci)吸力(li)会很(hen)小导致无法工作(zuo)；交(jiao)流(liu)电(dian)(dian)(dian)(dian)磁(ci)(ci)阀(fa)(fa)接入了(le)直(zhi)流(liu)电(dian)(dian)(dian)(dian)源(yuan)(yuan)，会出现(xian)电(dian)(dian)(dian)(dian)流(liu)过(guo)大(da)(da)使线(xian)圈温度升高把电(dian)(dian)(dian)(dian)磁(ci)(ci)阀(fa)(fa)烧(shao)坏。电(dian)(dian)(dian)(dian)磁(ci)(ci)阀(fa)(fa)的(de)供电(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)源(yuan)(yuan)应(ying)与铭牌上的(de)额定电(dian)(dian)(dian)(dian)压相符，电(dian)(dian)(dian)(dian)源(yuan)(yuan)电(dian)(dian)(dian)(dian)压过(guo)高，使电(dian)(dian)(dian)(dian)磁(ci)(ci)阀(fa)(fa)电(dian)(dian)(dian)(dian)流(liu)过(guo)大(da)(da)而温升异(yi)常，且电(dian)(dian)(dian)(dian)磁(ci)(ci)吸力(li)太大(da)(da)导致冲击力(li)过(guo)大(da)(da)，而影响阀(fa)(fa)的(de)可靠性。电(dian)(dian)(dian)(dian)源(yuan)(yuan)电(dian)(dian)(dian)(dian)压过(guo)低，电(dian)(dian)(dian)(dian)磁(ci)(ci)阀(fa)(fa)的(de)电(dian)(dian)(dian)(dian)磁(ci)(ci)吸力(li)下降过(guo)多，会影响到(dao)开阀(fa)(fa)能(neng)力(li)而难以可靠地工作(zuo)。 要考虑电(dian)(dian)(dian)(dian)磁(ci)(ci)阀(fa)(fa)的(de)使用距离。电(dian)(dian)(dian)(dian)磁(ci)(ci)阀(fa)(fa)线(xian)圈电(dian)(dian)(dian)(dian)压一般以24V. DC 或220V. AC的(de)居多。

实际应用中(zhong)为了保证电磁阀可靠动作，电缆长度不要超过以上计算值。对距(ju)离较(jiao)远的现场，而且使(shi)用在(zai)信(xin)号联锁系统时，只能考虑更换线(xian)(xian)径更粗的导(dao)线(xian)(xian)，或(huo)者提高供电电源来解决。

(5) 要考虑阀(fa)(fa)的(de)工(gong)作频度 工(gong)作频度即电(dian)磁阀(fa)(fa)在(zai)使用(yong)时(shi)所允许的(de)最(zui)高(gao)动(dong)作次数，通常用(yong)每分钟开阀(fa)(fa)与关阀(fa)(fa)的(de)次数来表示。是由(you)电(dian)磁阀(fa)(fa)的(de)类型与结构来决定，如(ru)直接动(dong)作式的(de)电(dian)磁阀(fa)(fa)动(dong)作时(shi)间(jian)快，它的(de)工(gong)作频度就(jiu)可高(gao)一些。 生产(chan)有连续生产(chan)、间(jian)歇生产(chan)、短时(shi)生产(chan)。在(zai)连续生产(chan)场合使用(yong)了短时(shi)工(gong)作制(zhi)的(de)电(dian)磁阀(fa)(fa)，使用(yong)寿命就(jiu)会缩(suo)短，甚至会在(zai)短期内损坏。无恰当(dang)产(chan)品可选(xuan)时(shi)，只(zhi)能选(xuan)用(yong)高(gao)一档的(de)产(chan)品，而(er)不(bu)要降(jiang)额选(xuan)择。

(6) 重视细(xi)节问题(ti)(ti) 很多电磁(ci)阀(fa)是可以通用的，在满足使用要求(qiu)的基础(chu)上，应(ying)(ying)选(xuan)择最经济的产(chan)品(pin)。一般(ban)电磁(ci)阀(fa)是不防水(shui)的，安装环境要考虑(lv)防水(shui)问题(ti)(ti)。对腐蚀性介质应(ying)(ying)选(xuan)用不锈钢产(chan)品(pin)；电磁(ci)阀(fa)是选(xuan)择常(chang)(chang)闭型还是常(chang)(chang)开型，应(ying)(ying)根据工(gong)艺要求(qiu)及(ji)安全来进行(xing)选(xuan)择。