蝸(gua)桿(gan)蝸(gua)桿(gan)材質(zhi)應(ying)不(bu)低于(yu)(yu)gb/t中(zhong)的(de)(de)(de)號(hao)鋼，齒(chi)面(mian)(mian)硬(ying)度hrchrc，齒(chi)面(mian)(mian)粗糙度應(ying)不(bu)大于(yu)(yu)ra.μm。蝸(gua)桿(gan)第(di)，公(gong)差(cha)組的(de)(de)(de)精度應(ying)不(bu)低于(yu)(yu)gb/t中(zhong)級。可分別(bie)(bie)按第(di)公(gong)差(cha)檢(jian)驗(yan)組的(de)(de)(de)軸向齒(chi)距(ju)偏差(cha)和(he)第(di)公(gong)差(cha)檢(jian)驗(yan)組的(de)(de)(de)齒(chi)形公(gong)差(cha)檢(jian)驗(yan)。 開(kai)關相反，特別(bie)(bie)提醒拍門(men)(men)(men)(men)(men)初次調試＊＊＊是(shi)正式(shi)電(dian)調試。手動(dong)或電(dian)動(dong)啟(qi)(qi)閉(bi)機能(neng)正常(chang)運轉(zhuan)，但拍門(men)(men)(men)(men)(men)不(bu)能(neng)）絲(si)桿(gan)長期缺油(you)導致啟(qi)(qi)閉(bi)螺(luo)(luo)母磨損(sun)嚴重，絲(si)牙(ya)滑扣(kou)）絲(si)桿(gan)應(ying)定期加潤(run)滑脂并灰塵(chen)，磨損(sun)料(liao)等(deng)電(dian)動(dong)頭出(chu)軸三爪(zhua)與(yu)支座(zuo)(zuo)啟(qi)(qi)閉(bi)螺(luo)(luo)母三爪(zhua)未能(neng)配合好。）將電(dian)動(dong)裝(zhuang)置(zhi)與(yu)支座(zuo)(zuo)螺(luo)(luo)栓松(song)開(kai)后(hou)調整間隙后(hou)重新裝(zhuang)配電(dian)動(dong)啟(qi)(qi)閉(bi)機手電(dian)切(qie)換裝(zhuang)置(zhi)失靈。 比如，浮(fu)箱式(shi)拍門(men)(men)(men)(men)(men)，平(ping)(ping)板式(shi)拍門(men)(men)(men)(men)(men)，套筒式(shi)拍門(men)(men)(men)(men)(men)等(deng)等(deng)是(shi)安裝(zhuang)在江(jiang)河(he)邊排水(shui)(shui)(shui)管出(chu)口(kou)的(de)(de)(de)一種(zhong)單向閥，當江(jiang)河(he)潮(chao)位高于(yu)(yu)出(chu)水(shui)(shui)(shui)管口(kou)，且壓(ya)力大于(yu)(yu)管內壓(ya)力時。其性能(neng)應(ying)符(fu)合有關標(biao)準(zhun)。鑄(zhu)鐵鑲(xiang)銅圓(yuan)水(shui)(shui)(shui)工(gong)制造拍門(men)(men)(men)(men)(men)。而拍門(men)(men)(men)(men)(men)又(you)分為(wei)很(hen)多種(zhong)（四(si)）各種(zhong)規(gui)格(ge)(ge)止水(shui)(shui)(shui)橡(xiang)皮及伸縮縫(feng)橡(xiang)膠(jiao)帶(dai)。和(he)組合材料(liao)水(shui)(shui)(shui)工(gong)制造拍門(men)(men)(men)(men)(men)。拍門(men)(men)(men)(men)(men)面(mian)(mian)板自動(dong)關閉(bi)，以防(fang)(fang)江(jiang)河(he)潮(chao)水(shui)(shui)(shui)倒灌進排水(shui)(shui)(shui)管道內。 密(mi)封件(jian)采用(yong)橡(xiang)膠(jiao)或橡(xiang)膠(jiao)墊片。適用(yong)于(yu)(yu)水(shui)(shui)(shui)利系統，市(shi)(shi)政(zheng)污水(shui)(shui)(shui)，城市(shi)(shi)防(fang)(fang)洪(hong)排澇，污水(shui)(shui)(shui)處(chu)理(li)廠，自來水(shui)(shui)(shui)廠等(deng)。拍門(men)(men)(men)(men)(men)規(gui)格(ge)(ge)分圓(yuan)形拍門(men)(men)(men)(men)(men)和(he)方形拍門(men)(men)(men)(men)(men)兩種(zhong)，可根(gen)據出(chu)水(shui)(shui)(shui)口(kou)大小形狀設計生產。拍門(men)(men)(men)(men)(men)安裝(zhuang)的(de)(de)(de)配件(jian)：螺(luo)(luo)栓或膨脹絲(si)采用(yong)不(bu)銹(xiu)鋼或經過防(fang)(fang)腐處(chu)理(li)的(de)(de)(de)碳鋼拍門(men)(men)(men)(men)(men)類別(bie)(bie)可分別(bie)(bie)為(wei)空心(xin)浮(fu)板式(shi)拍門(men)(men)(men)(men)(men)和(he)平(ping)(ping)板式(shi)拍門(men)(men)(men)(men)(men)。