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[" Quelleel是选择夹套或冷却的原则?

2017-11-28View Original

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2 Quelle-on peut penser que tous les fluides dans les pompes seagent gelés à des des températuresurs plus basses que是否可以认为泵内物料的凝固点高于环境温度都需要夹套?
Reply #22017-11-28
那怎么能这样认为呢?在东北冬季零下几十度时抽水的的泵也需要加夹套吗。
Reply #32017-11-29
Il faut prendre en compte beaucoup de facteurs. Par exemple, en hiver de l'Est de la中国东北冬季零下几度时水泵也需要蒸汽保温。第一泵的成本会增加。现场还需要布置蒸汽管线等。成本、工艺、操作、介质物性都需要考虑。比如液硫如果不保温泵就没法用,并且温度还要控制在1113-11165度左右。温度低了或高了粘度都会增大 kuk pérdida nhiều yếu tố. Ví dụ,在东北冬季零下几度时水泵也需要蒸汽保温。第一泵的成本会增加。现场还需要布置蒸汽管线等。成本、工艺、操作、介质物性都需要考虑。比如液硫如果不保温泵就没法用,并且温度还要控制在1113-11165度左右。温度低了或高了粘度都会增大。
Reply #42017-12-02
Les deux fonctions principales de la夹套的作用无非两点:防止结晶的加热、防止对密封或托架的过热的降温

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