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LMD手(shou)動(dong)(dong)(dong)插板(ban)(ban)閥(fa)(fa)(fa)(fa)又稱手(shou)動(dong)(dong)(dong)刀(dao)型(xing)閘(zha)(zha)閥(fa)(fa)(fa)(fa)，刀(dao)形(xing)閘(zha)(zha)閥(fa)(fa)(fa)(fa)它是(shi)(shi)一(yi)種(zhong)閘(zha)(zha)板(ban)(ban)與(yu)閥(fa)(fa)(fa)(fa)座始終(zhong)緊密接觸密封的閥(fa)(fa)(fa)(fa)門(men)，其原理(li)是(shi)(shi)閘(zha)(zha)板(ban)(ban)上開(kai)有(you)一(yi)個(ge)通(tong)徑大(da)小的圓口，通(tong)過閘(zha)(zha)板(ban)(ban)啟(qi)閉使(shi)得閘(zha)(zha)板(ban)(ban)上圓口跟(gen)通(tong)徑做*脫(tuo)離和相吻合的動(dong)(dong)(dong)作。手(shou)動(dong)(dong)(dong)插板(ban)(ban)閥(fa)(fa)(fa)(fa)是(shi)(shi)主要控制設備(bei)，廣泛(fan)使(shi)用在冶金、礦山、建材、糧(liang)食。手(shou) 動(dong)(dong)(dong)插板(ban)(ban)閥(fa)(fa)(fa)(fa)通(tong)常手(shou)動(dong)(dong)(dong)插板(ban)(ban)閥(fa)(fa)(fa)(fa)是(shi)(shi)一(yi)種(zhong)粉(fen)料(liao)、晶(jing)粒料(liao)、顆粒料(liao)及小塊(kuai)物料(liao)的流量或(huo)輸送量的于卸料(liao)器配(pei)套使(shi)用，手(shou)動(dong)(dong)(dong)螺旋閘(zha)(zha)閥(fa)(fa)(fa)(fa)的直徑與(yu)卸料(liao)器進料(liao)口配(pei)套，有(you)方形(xing)和圓形(xing)兩(liang)種(zhong)。