防火(huo)閥(fa)、排煙閥(fa)（口）的(de)(de)(de)(de)制(zhi)作(zuo)(zuo)防火(huo)閥(fa)是空調(diao)系統重要(yao)的(de)(de)(de)(de)安(an)全裝置，熔(rong)(rong)斷(duan)關(guan)(guan)閉(bi)溫度(du)為70℃。防火(huo)閥(fa)制(zhi)作(zuo)(zuo)時，外(wai)殼鋼(gang)板厚度(du)不(bu)應(ying)(ying)小于(yu)2 mm，防止在(zai)火(huo)災狀態下(xia)外(wai)殼變形影響(xiang)(xiang)閥(fa)板關(guan)(guan)閉(bi)。閥(fa)門軸承等(deng)可動部分必須用黃銅、青銅、不(bu)銹鋼(gang)及鍍鋅鋼(gang)件(jian)(jian)(jian)等(deng)耐腐蝕(shi)材料制(zhi)作(zuo)(zuo)，以(yi)免在(zai)火(huo)災時因銹蝕(shi)影響(xiang)(xiang)閥(fa)件(jian)(jian)(jian)動作(zuo)(zuo)而失靈。防火(huo)閥(fa)的(de)(de)(de)(de)易熔(rong)(rong)片(pian)是關(guan)(guan)鍵部件(jian)(jian)(jian)，必須用正(zheng)規產品制(zhi)作(zuo)(zuo)，而不(bu)能(neng)用尼龍繩(sheng)或膠片(pian)等(deng)代(dai)替。易熔(rong)(rong)片(pian)的(de)(de)(de)(de)檢(jian)(jian)查應(ying)(ying)在(zai)水浴中(zhong)進行，其(qi)熔(rong)(rong)點溫度(du)與設計要(yao)求的(de)(de)(de)(de)允(yun)許偏差為-2。易熔(rong)(rong)片(pian)要(yao)安(an)裝在(zai)閥(fa)板的(de)(de)(de)(de)迎風(feng)側。制(zhi)作(zuo)(zuo)完成后(hou)應(ying)(ying)做漏風(feng)檢(jian)(jian)驗(yan)，以(yi)保(bao)證閥(fa)板關(guan)(guan)閉(bi)嚴密(mi)，能(neng)有效地隔(ge)絕氣流。

通(tong)風(feng)(feng)(feng)管道是(shi)工(gong)業(ye)通(tong)風(feng)(feng)(feng)系(xi)統(tong)的(de)(de)(de)重要(yao)(yao)組成部(bu)分，通(tong)風(feng)(feng)(feng)管道設計(ji)的(de)(de)(de)目的(de)(de)(de)既要(yao)(yao)保證風(feng)(feng)(feng)量(liang)的(de)(de)(de)合(he)理分配，還(huan)要(yao)(yao)確定通(tong)風(feng)(feng)(feng)管道的(de)(de)(de)布置和(he)尺寸(cun)。合(he)理的(de)(de)(de)通(tong)風(feng)(feng)(feng)管道設計(ji)不僅直接影響工(gong)業(ye)通(tong)風(feng)(feng)(feng)系(xi)統(tong)的(de)(de)(de)使用效(xiao)果和(he)技(ji)術性能(neng)，而且(qie)還(huan)能(neng)降低投資和(he)運行費(fei)用。在工(gong)業(ye)通(tong)風(feng)(feng)(feng)系(xi)統(tong)中(zhong)，當(dang)空氣流過斷(duan)面(mian)變(bian)化、流向變(bian)化和(he)流量(liang)變(bian)化的(de)(de)(de)管件時，都(dou)會產(chan)生(sheng)局部(bu)阻力。局部(bu)阻力在工(gong)業(ye)通(tong)風(feng)(feng)(feng)系(xi)統(tong)中(zhong)占(zhan)有較大的(de)(de)(de)比例，設計(ji)時應該注意，盡量(liang)減少局部(bu)阻力的(de)(de)(de)產(chan)生(sheng) 。

通(tong)風(feng)(feng)(feng)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)(de)(de)劃(hua)分(fen)(fen)不(bu)同(tong)區域(yu)的(de)(de)(de)(de)(de)工(gong)業通(tong)風(feng)(feng)(feng)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)對(dui)送(song)風(feng)(feng)(feng)和(he)排(pai)(pai)風(feng)(feng)(feng)的(de)(de)(de)(de)(de)要求不(bu)同(tong)，區域(yu)較(jiao)大時(shi)，白鐵皮(pi)抽煙機定做，對(dui)應的(de)(de)(de)(de)(de)送(song)風(feng)(feng)(feng)和(he)排(pai)(pai)風(feng)(feng)(feng)點也(ye)較(jiao)多，可將(jiang)其(qi)分(fen)(fen)為(wei)多個(ge)送(song)風(feng)(feng)(feng)和(he)排(pai)(pai)風(feng)(feng)(feng)的(de)(de)(de)(de)(de)子系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)，由1臺(tai)風(feng)(feng)(feng)機與其(qi)相連的(de)(de)(de)(de)(de)管道構成一(yi)個(ge)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)，方便(bian)管理。系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)劃(hua)分(fen)(fen)的(de)(de)(de)(de)(de)依據主要為(wei)：生產工(gong)藝流程(cheng)和(he)運(yun)行時(shi)間相同(tong)的(de)(de)(de)(de)(de)，建(jian)議(yi)劃(hua)分(fen)(fen)為(wei)一(yi)個(ge)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)；運(yun)行參數(shu)和(he)空(kong)氣處理要求相同(tong)的(de)(de)(de)(de)(de)，建(jian)議(yi)劃(hua)分(fen)(fen)為(wei)一(yi)個(ge)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)；位于(yu)風(feng)(feng)(feng)機附近的(de)(de)(de)(de)(de)排(pai)(pai)風(feng)(feng)(feng)量(liang)較(jiao)大的(de)(de)(de)(de)(de)排(pai)(pai)風(feng)(feng)(feng)點與遠處排(pai)(pai)風(feng)(feng)(feng)量(liang)較(jiao)小(xiao)的(de)(de)(de)(de)(de)排(pai)(pai)風(feng)(feng)(feng)點不(bu)建(jian)議(yi)劃(hua)分(fen)(fen)為(wei)一(yi)個(ge)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)，這將(jiang)增加排(pai)(pai)風(feng)(feng)(feng)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)(de)(de)阻力。另外，兩(liang)種(zhong)或(huo)兩(liang)種(zhong)以(yi)上有害(hai)物質(zhi)混(hun)合后能(neng)增加毒(du)性(xing)和(he)腐蝕性(xing)、容(rong)易引起火(huo)災和(he)的(de)(de)(de)(de)(de)，不(bu)能(neng)劃(hua)分(fen)(fen)為(wei)一(yi)個(ge)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)，建(jian)議(yi)單獨設置排(pai)(pai)風(feng)(feng)(feng)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)。