常压人孔是安装在储罐顶上的安全应急通气装置，通常与机械呼吸阀配套使用，既能避免因意外原因造成罐内急剧超压或真空时，损坏储罐而发生事故，又有起到安全阻火作用，是保护储罐的安全装置，特别适用于贮存物料以氮气封顶的拱顶常压罐。具有定压排放、定压吸入、开闭灵活、安全阻火、密封性能好、安全可靠等优点。常压人孔也是最普通的人孔.常压人孔

由于人孔安装在油罐的最下层体圈上，防渗漏就显得特别重要。要求两法兰结合面必须保证其平直度，无飘扭现象。加强板和法兰应尽量在整块钢板上切割而不拼接。法兰和盖板上加工有密封圈，在施工中要特别注意保护。密封用3mm厚石棉橡胶垫片，不允许有折裂。安装人孔盖板上紧螺栓时，要成对角均与用力，以防孔盖变形Since the manhole is installed on the bottom ring of the oil tank, leakage prevention is particularly important. It is required that the joint surface of the two flanges must be flat and free of twisting. Reinforcing plates and flanges should be cut on the whole steel plate as far as possible without splicing. The flange and cover plate are processed with sealing rings, so special attention should be paid to protection during construction. 3mm thick asbestos rubber gasket is used for sealing, no cracks are allowed. When installing the manhole cover to tighten the bolts, force diagonally to prevent the manhole cover from deforming常压人孔

浙江米勒洁净设备科技有限公司是国内专业生产制造洁净卫生级阀门管件，主要应用于食品机械行业、制药机械行业、乳制品行业、酿酒饮料行业以及精细化工等行业高精度卫生级流体设备的专业生产厂家，产品规格齐全；产品主要有：

无菌隔膜阀，卡箍直通隔膜阀，三通隔膜阀，法兰隔膜阀，气动隔膜阀，U型隔膜阀，罐底隔膜阀 ；

无菌球阀，卡箍直通球阀，螺纹球阀，焊接球阀，气动球阀，法兰球阀，电动球阀；

卫生级蝶阀，焊接蝶阀，卡箍直通蝶阀，螺纹蝶阀，法兰蝶阀，气动蝶阀，电动蝶阀；

不锈钢卫生泵，不锈钢卫生级离心泵，不锈钢卫生自吸泵，不锈钢酒精防爆泵，卫生奶泵，卫生饮料泵；

Aseptic ball valve, clamp straight-through ball valve, threaded ball valve, welded ball valve, pneumatic ball valve, flanged ball valve, electric ball valve;

Sanitary butterfly valve, welded butterfly valve, clamp straight-through butterfly valve, threaded butterfly valve, flange butterfly valve, pneumatic butterfly valve, electric butterfly valve;

Stainless steel sanitary pump, stainless steel sanitary centrifugal pump, stainless steel sanitary self-priming pump, stainless steel alcohol explosion-proof pump, sanitary milk pump, sanitary beverage pump;

止回阀，过滤器、呼吸器、换向阀、防混阀、安全阀；

卫生级不锈钢管件，焊接弯头，快装弯头，不锈钢三通，快装三通，四通，真空弯头，大小头；

罐顶组件系列，不锈钢储罐，发酵罐，不锈钢卫生级人孔，清洗球/器，视镜灯，排气阀等其它非标产品生产加工；

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