氣動楔式閘閥關閉的(de)前階段：在(zai)上活塞的(de)推(tui)動下，閘板(ban)離開全開位(wei)置，開始(shi)下降。

氣(qi)(qi)動楔式閘(zha)閥(fa)關閉的(de)后階段：當上活(huo)塞碰到下(xia)(xia)活(huo)塞凸臺，并帶(dai)動下(xia)(xia)活(huo)塞一起繼續下(xia)(xia)降(jiang)(jiang)時，由于(yu)下(xia)(xia)氣(qi)(qi)缸上氣(qi)(qi)室的(de)進(jin)氣(qi)(qi)通(tong)道和下(xia)(xia)氣(qi)(qi)缸下(xia)(xia)氣(qi)(qi)室的(de)排氣(qi)(qi)通(tong)道設(she)有阻礙，明顯地減(jian)慢了(le)下(xia)(xia)行的(de)速度，進(jin)至閘(zha)板下(xia)(xia)降(jiang)(jiang)到了(le)全(quan)關位置(zhi)。減(jian)緩閘(zha)板下(xia)(xia)行的(de)沖擊，自行可(ke)關嚴(yan)閥(fa)門，又不(bu)使閥(fa)板楔得(de)過緊，同時，還保(bao)護了(le)密封面，免受猛烈(lie)沖擊而損壞(huai)。

靈活(huo)可(ke)靠的氣(qi)(qi)動(dong)(dong)(dong)-手(shou)(shou)動(dong)(dong)(dong)轉(zhuan)換(huan)機構,裝氣(qi)(qi)缸蓋上(shang)部的氣(qi)(qi)動(dong)(dong)(dong)-手(shou)(shou)動(dong)(dong)(dong)轉(zhuan)換(huan)機構，在氣(qi)(qi)動(dong)(dong)(dong)帶手(shou)(shou)動(dong)(dong)(dong)閘閥開啟的關閉過程的任何位(wei)置上(shang)，都可(ke)十分方(fang)便的轉(zhuan)動(dong)(dong)(dong)操(cao)作(zuo)手(shou)(shou)柄，直接(jie)地(di)進行由氣(qi)(qi)動(dong)(dong)(dong)至(zhi)手(shou)(shou)動(dong)(dong)(dong)或(huo)由手(shou)(shou)動(dong)(dong)(dong)至(zhi)氣(qi)(qi)動(dong)(dong)(dong)的操(cao)作(zuo)方(fang)式(shi)(shi)的轉(zhuan)換(huan)，轉(zhuan)換(huan)操(cao)作(zuo)手(shou)(shou)柄采用(yong)定(ding)位(wei)銷(xiao)式(shi)(shi)自鎖(suo)設計，手(shou)(shou)柄定(ding)位(wei)后，可(ke)靠鎮定(ding)。由電磁閥及(ji)其控制電路(lu)或(huo)供風系統發生故障時，不需其他輔助工(gong)具，即可(ke)迅速轉(zhuan)換(huan)成(cheng)手(shou)(shou)動(dong)(dong)(dong)操(cao)作(zuo)狀(zhuang)態，保證線(xian)路(lu)正(zheng)常運行，避免(mian)事故發生。

關閥時間(jian)可調(diao)通過(guo)調(diao)整，安裝在隔板上的(de)緩沖機構(gou)，還(huan)可以在一定范圍內調(diao)整閘板關閉的(de)時間(jian)。