电机过载运行，使电流增加，转速降低，耗损加大。绕组接线错误或发生短路时，均会使电动机过热而损坏，为了避免电机烧毁，在运行中的电动机应进行必要的监测：电源电压变化情况。与额定值偏差不超过正负百分之五。三相电压不平衡度不大于正负百分之五。常检查电机三相电流是否平衡。其三相电流任何一相电流与其他两相电流平均值差不超过1%；如果超过则表明电机有故障，应保持在额定电流下运行。观察电机有无振动，噪音和异常气味。
一般多效蒸发的末效或后几效总是在真空下操作，由于各效（除末效外）二次蒸汽都作为下一效的加热蒸汽，故提高了生蒸汽的利用率，即经济性。需要强调的是蒸发量与传热量成正比，多效蒸发并没有提高蒸发量，而只是节约了加热蒸汽，其代价是设备投资增加。在相同的操作条件下，多效蒸发器的生产能力并不比传热面积与其中一个效相等的单效蒸发器的生产能力大。特别应注意那种认为多效蒸发器的生产能力是单效蒸发器的若干倍的观点是错误的。
在传动装置箱体内设关向微动开关(蝶板全关位置为)，当蝶板由～4位置时微动开关支作，输出阀门关闭信号，4～9位置时另一对常闭可输出阀门打开信号。可调整压触微动开关的凸轮，显示蝶板所处的不同位置。信号蝶阀的特点小型轻便，容易拆装及维修，并可以任意位置上安装。结构简单、紧凑，9旋转启闭迅速。操作扭矩小，省力轻巧。达到完全密封，气体试验泄漏为零。选择不同零部件材质，可适用多种介质。
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
25V-10A-1C-22R 25V-21A-86C-22R 25V-17A-1D-22R 25V10A-1A22R
25V21A-86A22R 25V17A-1B22R 25V10A-1C22R 25V21A-86C22R
25V17A-1D22R 25V-12A-1A-22R 25V-10A-11A-22R 25V-21A-1B-22R
25V-12A-1C-22R 25V-10A-11C-22R 25V-21A-1D-22R 25V12A-1A22R
25V10A-11A22R 25V21A-1B22R 25V12A-1C22R 25V10A-11C22R
25V21A-1D22R 25V-14A-1A-22R 25V-12A-11A-22R 25V-10A-86B-22R
25V-14A-1C-22R 25V-12A-11C-22R 25V-10A-86D-22R 25V14A-1A22R
25V12A-11A22R 25V10A-86B22R 25V14A-1C22R 25V12A-11C22R
25V10A-86D22R 25V-17A-1A-22R 25V-14A-11A-22R 25V-12A-86B-22R
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
VICKERS (威格士) 2520V 10A 5 1C22R VICKERS (威格士) 2520V 12A 5 1C22R
VICKERS (威格士) 2520V 14A 5 1C22R VICKERS (威格士) 2520V 17A 5 1C22R
VICKERS (威格士) 2520V 21A 5 1C22R
VICKERS (威格士) 2520V 12A8 1C22R VICKERS (威格士) 2520V 14A 8 1C22R
VICKERS (威格士) 2520V 17A 8 1C22R VICKERS (威格士) 2520V 21A 8 1C22R
VICKERS (威格士) 2520V 12A10 1C22R VICKERS (威格士) 2520V 14A 10 1C22R
VICKERS (威格士) 2520V 17A 10 1C22R VICKERS (威格士) 2520V 21A 10 1C22R
VICKERS (威格士) 2520V 12A12 1C22R VICKERS (威格士) 2520V 14A 12 1C22R
VICKERS (威格士) 2520V 17A 121C22R VICKERS (威格士) 2520V 21A 12 1C22R
VICKERS (威格士) 2520V 12A14 1C22R VICKERS (威格士) 2520V 14A 14 1C22R
VICKERS (威格士) 2520V 17A 14 1C22R VICKERS (威格士) 2520V 21A 14 1C22R
VICKERS (威格士) 2525V系列双联泵
VICKERS (威格士) 2525V 10A 10 1C22R VICKERS (威格士) 2525V 12A 10 1C22R
VICKERS (威格士) 2525V 14A 10 1C22R VICKERS (威格士) 2525V 17A 10 1C22R
VICKERS (威格士) 2525V 21A 10 1C22R
VICKERS (威格士) 2525V 10A 12 1C22R VICKERS (威格士) 2525V 12A 12 1C22R
VICKERS (威格士) 2525V 14A 12 1C22R VICKERS (威格士) 2525V 17A 12 1C22R
VICKERS (威格士) 2525V 21A 12 1C22R
VICKERS (威格士) 2525V 10A 14 1C22R VICKERS (威格士) 2525V 12A 14 1C22R
VICKERS (威格士) 2525V 14A 14 1C22R VICKERS (威格士) 2525V 17A 14 1C22R
VICKERS (威格士) 2525V 21A 14 1C22R
VICKERS (威格士) 2525V 10A 17 1C22R VICKERS (威格士) 2525V 12A 17 1C22R
VICKERS (威格士) 2525V 14A 17 1C22R VICKERS (威格士) 2525V 17A 17 1C22R
VICKERS (威格士) 2525V 21A 17 1C22R
VICKERS (威格士) 2525V 10A 21 1C22R VICKERS (威格士) 2525V 12A 21 1C22R
VICKERS (威格士) 2525V 14A 21 1C22R VICKERS (威格士) 2525V 17A 21 1C22R
VICKERS (威格士) 2525V 21A 21 1C22R
VICKERS (威格士) 3520V系列双联泵
VICKERS (威格士) 3520V 25A 5 1C22R VICKERS (威格士) 3520V 30A 5 1C22R
VICKERS (威格士) 3520V 35A 5 1C22R VICKERS (威格士) 3520V 38A 5 1C22R
VICKERS (威格士) 3520V 25A 8 1C22R VICKERS (威格士) 3520V 30A 8 1C22R
VICKERS (威格士) 3520V 35A 8 1C22R VICKERS (威格士) 3520V 38A 8 1C22R
VICKERS (威格士) 3520V 25A 10 1C22R VICKERS (威格士) 3520V 30A 10 1C22R
VICKERS (威格士) 3520V 35A 10 1C22R VICKERS (威格士) 3520V 38A 10 1C22R
VICKERS (威格士) 3520V 25A 11 1C22R VICKERS (威格士) 3520V 30A 11 1C22R
VICKERS (威格士) 3520V 35A 11 1C22R VICKERS (威格士) 3520V 38A 11 1C22R
VICKERS (威格士) 3520V 25A 12 1C22R VICKERS (威格士) 3520V 30A 12 1C22R
VICKERS (威格士) 3520V 35A 12 1C22R VICKERS (威格士) 3520V 38A 12 1C22R
VICKERS (威格士) 3520V 25A 14 1C22R VICKERS (威格士) 3520V 30A 14 1C22R
VICKERS (威格士) 3520V 35A 14 1C22R VICKERS (威格士) 3520V 38A 14 1C22R
VICKERS (威格士) 3525V系列双联泵
VICKERS (威格士) 3525V 25A 10 1C22R VICKERS (威格士) 3525V 30A 10 1C22R
VICKERS (威格士) 3525V 35A 10 1C22R VICKERS (威格士) 3525V 38A 10 1C22R
VICKERS (威格士) 3525V 25A 12 1C22R VICKERS (威格士) 3525V 30A 12 1C22R
VICKERS (威格士) 3525V 35A 12 1C22R VICKERS (威格士) 3525V 38A 12 1C22R
VICKERS (威格士) 3525V 25A 14 1C22R VICKERS (威格士) 3525V 30A 14 1C22R
VICKERS (威格士) 3525V 35A 14 1C22R VICKERS (威格士) 3525V 38A 14 1C22R
VICKERS (威格士) 3525V 25A 17 1C22R VICKERS (威格士) 3525V 30A 17 1C22R
VICKERS (威格士) 3525V 35A 17 1C22R VICKERS (威格士) 3525V 38A 17 1C22R
VICKERS (威格士) 3525V 25A 21 1C22R VICKERS (威格士) 3525V 30A 21 1C22R
VICKERS (威格士) 3525V 35A 21 1C22R VICKERS (威格士) 3525V 38A 21 1C22R
VICKERS (威格士) 4520V系列双联泵
VICKERS (威格士) 4520V 42 A 5 1C22R VICKERS (威格士) 4520V 45A 5 1C22R
VICKERS (威格士) 4520V 50 A 5 1C22R VICKERS (威格士) 4520V 60 A 5 1C22R
VICKERS (威格士) 4520V 42 A 8 1C22R VICKERS (威格士) 4520V 45A 8 1C22R
VICKERS (威格士) 4520V 50 A 8 1C22R VICKERS (威格士) 4520V 60 A 8 1C22R
VICKERS (威格士) 4520V 42 A 9 1C22R VICKERS (威格士) 4520V 45A 9 1C22R
VICKERS (威格士) 4520V 50 A 9 1C22R VICKERS (威格士) 4520V 60 A 9 1C22R
VICKERS (威格士) 4520V 42 A 11 1C22R VICKERS (威格士) 4520V 45A 11 1C22R
VICKERS (威格士) 4520V 50 A 11 1C22R VICKERS (威格士) 4520V 60 A 11 1C22R
VICKERS (威格士) 4520V 42 A 12 1C22R VICKERS (威格士) 4520V 45A 12 1C22R
VICKERS (威格士) 4520V 50 A 12 1C22R VICKERS (威格士) 4520V 60 A 12 1C22R
VICKERS (威格士) 4520V 42 A 14 1C22R VICKERS (威格士) 4520V 45A 14 1C22R
VICKERS (威格士) 4520V 50 A 14 1C22R VICKERS (威格士) 4520V 60 A 14 1C22R
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
VICKERS (威格士) 4525V50A 10 1C22R VICKERS (威格士) 4525V 60A 10 1C22R
VICKERS (威格士) 4525V42A 12 1C22R VICKERS (威格士) 4525V 45A 12 1C22R
VICKERS (威格士) 4525V50A 12 1C22R VICKERS (威格士) 4525V 60A 12 1C22R
VICKERS (威格士) 4525V42A 14 1C22R VICKERS (威格士) 4525V 45A 14 1C22R
VICKERS (威格士) 4525V50A 14 1C22R VICKERS (威格士) 4525V 60A 14 1C22R
VICKERS (威格士) 4525V42A 17 1C22R VICKERS (威格士) 4525V 45A 17 1C22R
VICKERS (威格士) 4525V50A 17 1C22R VICKERS (威格士) 4525V 60A 17 1C22R
VICKERS (威格士) 4525V42A 21 1C22R VICKERS (威格士) 4525V 45A 21 1C22R
VICKERS (威格士) 4525V50A 21 1C22R VICKERS (威格士) 4525V 60A 21 1C22R
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
VICKERS (威格士) 4535V50A 25 1C22R VICKERS (威格士) 4535V60A 25 1C22R
VICKERS (威格士) 4535V42A 30 1C22R VICKERS (威格士) 4535V 45A 30 1C22R
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