NCB型内啮合齿轮泵工作NCB型内啮合齿轮泵是采用齿轮内啮合原理，内外齿轮节圆紧靠一边，另一边被泵盖上月牙板隔开。主轴上的主动内齿带动其中外齿轮同向转动，在进口处轮齿相互分离形成负压而吸人液体，轮齿在出口处不断嵌入啮合而将液体挤压输出。由于这种独特的结构，所以特别适用于输送黏度大的介质，黏度范围为.2-1cp；本系列泵可反向输送，只要更换电机转向即可；该泵泵体可转向，进出口位置成直角，便于选配进出口位置；NCB-BW泵在泵体、端盖、轴承座间都有连接方便的保温或冷却介质的进出接口。商品的市场定位及流通区域条件。商品的市场定位、运输方式及流通区域的气候和地理条件等是冷冻食品包装设计时必须考虑的因素。国内销售的商品与面向不同出口的商品其包装和装潢要求各不相同，不同运输方式对包装的保护性要求也不相同。对冷冻食品包装而言，商品流通区域的气候条件变化至关重要，因为气温对冷冻食品内部成分的化学变化、微生物及其包装材料本身的阻隔性都有很大的影响。包装整体结构和包装材料对冷冻食品的影响。
Cr5Mo合金法兰材质是珠光体耐热钢属于铬钼耐热钢，元素cr可提高钢的抗高温氧化性能和高温抗腐蚀性，能抵抗石油裂化过程中产生的腐蚀，Mo可提高钢在高温下的机械性能，同时也能降低钢的回火脆性倾向。因此1Cr5Mo耐热钢具有优良的耐高温硫腐蚀性、耐氧化性及较高的高温强度，工作温度可高达6℃，因为它的特性，此合金法兰被广泛地应用于常规热电站、核能动力装置、石油精制以及其它高温设备中。坡口加工：坡口加工宜采用机械方法，也可采用等离子切割、氧乙炔切割等热加工方法。
大反洗：由于交换剂被压实、污染等会影响正常运行，所以在运行若干周期后必须进行一次大反洗，大反洗的间隔周期可根据本厂的进水浊度、出水质量、运行压差和交换容量的情况而定，一般运行1～2个周期进行一次。大反洗后交换剂层被打乱，为了恢复正常交换容量，在大反洗后的次再生时，再生剂要比次增加.5～1.倍。大反洗时，打开大反洗进水阀，阀门要由小到大，反洗强度控制在反洗视镜的中心线为准，打开反洗排水阀进行反洗，反洗时间约为1～15分钟。
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