名義值越接近實(shí)際的流量或壓力越好，如果沒(méi)有與之相對(duì)應(yīng)的范圍，那就選擇名義流量值略大于實(shí)際值的那一檔，因?yàn)檫@樣會(huì)很好的應(yīng)用閥中全部機(jī)械行程和電氣參數(shù)的整個(gè)控制范圍，從而實(shí)現(xiàn)最高的分辨率。這一點(diǎn)和常規(guī)閥的選型原則（規(guī)格越大越好）完全相反，因此比例閥的選型過(guò)程要改變過(guò)去的傳統(tǒng)思維武漢耀泰機(jī)電設(shè)備有限公司
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