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SZ-LDE系列水流量计可广泛应用于化工、钢铁、煤炭、矿冶、石油开采、石化、造纸、环保、制糖、制药、食品、水利灌溉、给排水和港口疏浚等领域,可地测量各种酸、碱、盐溶液、原水、冷却水、污水、煤浆、矿浆、泥浆、水泥浆、纸浆、糖浆、药液和各种饮料等导电流体和固液二相体的体积流量。SZ-LDE系列水流量计有一体型和分体型二种组合形式,输出级皆采取电隔离,可方便地后位仪表配套,实现对流量的记录、控制和调节等功能。
R433b比其他的制冷剂的蒸发潜热大,单位时间降温速度更快;分子量小,流动性能好,输送压力低,压缩机的负荷减小,可延长压缩机的使用寿命,降低电耗,节省系统的运行成本。R433B组成成分,摩尔百分比:丙烷占94.9918%,丙烯占5.82%。名称:R433B,HC-433B分类:混合制冷剂分子量:44摩尔质量:44g/molCAS编号:74-98-6/115-7-1临界温度:96℃临界压力:4.27MPa临界密度:221臭氧层破坏潜能(ODP):温室效应指数(GWP):3R436A制冷剂R436A是碳氢化合物冷媒,不损坏臭氧层,无温室效应,该制冷剂热工性能与R134a相近。
下面讲到的原理都是一变频器拖动多马达的系统。PID控制原理根据反馈原理:要想维持一个物理量不变或基本不变,就应该引这个物理量与恒值比较,形成闭环系统。我们要想保持水压的恒定,因此就必须引入水压反馈值与给定值比较,从而形成闭环系统。但被控制的系统特点是非线性、大惯性的系统,现在控制和PID相结合的方法,在压力波动较大时使用模糊控制,以加快响应速度;在压力范围较小时采用PID来保持静态精度。这通过PLC加智能仪表可时现该算法,同时对PLC的编程来时现泵的工频与变频之间的切换。
冷水机制冷剂轮回系统:蒸发器中的液态制冷剂吸收水中的热量并开始蒸发,制冷剂与水之间形成一定的温度差,液态制冷剂亦完全蒸发变为气态后被压缩机吸入并压缩(压力和温度增加),气态制冷剂通过冷凝器(风冷/水冷)吸收热量,凝聚成液体,通过热力膨胀阀(或毛细管)节流后变成低温低压制冷剂进入蒸发器,完成制冷剂轮回过程。冷水机制冷系统基本组成:压缩机:压缩机是整个制冷系统中的核心部件,也是制冷剂压缩的动力之源。
25V21A-1C22R 25V17A-11C22R 25V14A-86D22R 25V21A-1C22R
25V17A-11C22R 25V14A-86D22R 25V-10A-86A-22R 25V-21A-11A-22R
25V-17A-86B-22R 25V-10A-86C-22R 25V-21A-11C-22R 25V-17A-86D-22R
25V10A-86A22R 25V21A-11A22R 25V17A-86B22R 25V10A-86C22R
25V21A-11C22R 25V17A-86D22R 25V-12A-86A-22R 25V-10A-1B-22R
25V-21A-86B-22R 25V-10A-1A-22R 25V-21A-86A-22R 25V-17A-1B-22R
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25V-12A-1C-22R 25V-10A-11C-22R 25V-21A-1D-22R 25V12A-1A22R
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25V-17A-1C-22R 25V-14A-11C-22R 25V-12A-86D-22R25V17A-1A22R
25V14A-11A22R 25V12A-86B22R
VICKERS (威格士) 2520V系列双联泵
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VICKERS (威格士) 2525V系列双联泵
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VICKERS (威格士) 3525V 25A 10 1C22R VICKERS (威格士) 3525V 30A 10 1C22R
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VICKERS (威格士) 4520V 42 A 5 1C22R VICKERS (威格士) 4520V 45A 5 1C22R
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VICKERS (威格士) 4525V系列双联泵
VICKERS (威格士) 4525V42A 10 1C22R VICKERS (威格士) 4525V 45A 10 1C22R
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VICKERS (威格士) 4535V系列双联泵
VICKERS (威格士) 4535V42A 25 1C22R VICKERS (威格士) 4535V 45A 25 1C22R
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