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風(feng)量余壓(ya)(ya)(ya)閥具(ju)(ju)有關閉緊(jin)密、反應(ying)靈(ling)敏、調節方便、外形美(mei)觀、不(bu)(bu)(bu)耗能源(yuan)等優點，用(yong)(yong)(yong)于(yu)房間維持正壓(ya)(ya)(ya)。余壓(ya)(ya)(ya)閥的具(ju)(ju)體規格(ge)和尺寸由(you)客戶(hu)確(que)定(ding)，一般情況下余壓(ya)(ya)(ya)閥都是(shi)采(cai)(cai)用(yong)(yong)(yong)鋼(gang)板(ban)來加工，但是(shi)由(you)于(yu)每(mei)個(ge)客戶(hu)安裝(zhuang)的場所不(bu)(bu)(bu)同。比(bi)如有的安裝(zhuang)在食品行(xing)(xing)業(ye)、凈化或(huo)(huo)者(zhe)有腐蝕(shi)性氣(qi)體場所等，就需要(yao)采(cai)(cai)用(yong)(yong)(yong)不(bu)(bu)(bu)銹鋼(gang)材(cai)質(zhi)的，因為食品行(xing)(xing)業(ye)對衛生標準比(bi)較高不(bu)(bu)(bu)同于(yu)一般場所。產(chan)生腐蝕(shi)性氣(qi)體的場所也必需采(cai)(cai)用(yong)(yong)(yong)不(bu)(bu)(bu)銹鋼(gang)材(cai)質(zhi)（鋼(gang)板(ban)材(cai)質(zhi)的容易被腐蝕(shi)）。余壓(ya)(ya)(ya)閥具(ju)(ju)體使用(yong)(yong)(yong)什(shen)么材(cai)質(zhi)可(ke)由(you)客戶(hu)根據自己實際情況來確(que)定(ding)。鋼(gang)板(ban)表(biao)面處(chu)(chu)理一般情況下噴乳(ru)白色的漆或(huo)(huo)者(zhe)還可(ke)以(yi)噴塑。顏色可(ke)以(yi)隨意確(que)定(ding)。對于(yu)要(yao)求高的客戶(hu)鋼(gang)板(ban)余壓(ya)(ya)(ya)閥表(biao)面可(ke)以(yi)采(cai)(cai)用(yong)(yong)(yong)鍍(du)鋅或(huo)(huo)者(zhe)鍍(du)鉻處(chu)(chu)理來提(ti)高自己的耐腐蝕(shi)性程(cheng)度。余壓(ya)(ya)(ya)如果(guo)是(shi)不(bu)(bu)(bu)銹鋼(gang)材(cai)質(zhi)的不(bu)(bu)(bu)需要(yao)作任何(he)表(biao)面處(chu)(chu)理。