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ZMAP氣動(dong)薄膜單(dan)座(zuo)(zuo)調(diao)(diao)(diao)節(jie)(jie)閥(fa)通(tong)(tong)(tong)常分為(wei)(wei)直(zhi)通(tong)(tong)(tong)單(dan)座(zuo)(zuo)式(shi)(shi)調(diao)(diao)(diao)節(jie)(jie)閥(fa)和直(zhi)通(tong)(tong)(tong)雙座(zuo)(zuo)式(shi)(shi)調(diao)(diao)(diao)節(jie)(jie)閥(fa)兩種(zhong)，后者具有(you)流(liu)(liu)通(tong)(tong)(tong)能力大、不平衡辦(ban)小和操作穩定的特點(dian)，所以(yi)(yi)通(tong)(tong)(tong)常特別(bie)適用于大流(liu)(liu)量、高壓(ya)降和泄漏少的場合。流(liu)(liu)通(tong)(tong)(tong)能力Cv是選擇調(diao)(diao)(diao)節(jie)(jie)閥(fa)的主(zhu)要參(can)數(shu)(shu)之一，調(diao)(diao)(diao)節(jie)(jie)閥(fa)的流(liu)(liu)通(tong)(tong)(tong)能力的定義為(wei)(wei)：當調(diao)(diao)(diao)節(jie)(jie)閥(fa)全開時(shi)(shi)，閥(fa)兩端壓(ya)差為(wei)(wei)0.1MPa，流(liu)(liu)體(ti)密(mi)度為(wei)(wei)1g/cm3時(shi)(shi)，每(mei)小時(shi)(shi)流(liu)(liu)徑調(diao)(diao)(diao)節(jie)(jie)閥(fa)的流(liu)(liu)量數(shu)(shu)，稱為(wei)(wei)流(liu)(liu)通(tong)(tong)(tong)能力，也稱流(liu)(liu)量系數(shu)(shu)，以(yi)(yi)Cv表示，單(dan)位為(wei)(wei)t/h，液體(ti)的Cv值按下