武研销售WRY系列/临沂莱芜+常州市武研热油泵有限公司+WRY系列常州武进高温导热油泵要预热的原因有：

（1）温度高

(1) high temperature

热油泵一般温度在200～350℃左右，如不预热，泵体凉，热油进入后，因冷热差异大，食使泵经受不住这种剧烈的变化，引起泄漏、裂缝、部件受损和零件因热胀系数不一样，而使两个零件胀住等等。

The general temperature of hot oil pump in the 200 ~ 350 DEG C, such as preheating, pump body cool, into the hot oil, because of the differences of heat and cold, eat the pump could not withstand such drastic changes, causing leakage, cracks, damaged parts and components by the coefficient of thermal expansion is not the same, and the two parts bulging live and so on.

（2）粘度大

(2) viscosity

热油泵输送的介质粘度都较大，在常温下和低温下会凝固，甚至把泵体管线凝死，而造成启动不上量，流量、扬程小，并会使泵产生振动和杂音。

Heat pump transmission medium viscosity are larger, at room temperature and low temperature will be solidified, and even the pump pipe line to die, and cause no amount of start-up, flow, head small, and will make the pump vibration and noise.

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2016.6.27韩