当胶水含有较硬的填料时，必须采用耐磨泵，而且泵部整体竖直放置，使硬质填料不易沉积，使用维护更加方便，保证长期使用不影响吐出精度及比率。
And the pump integrated vertically, so the hard packing is not easy to deposit, to ensure the long-term use does not affect the precision and the rate of spit.
即使采取上述措施，泵的防砂和耐磨效果并不理想。
Even though these measures, the pump sand and the wear not ideal.
泵体、泵盖的材质采用铸钢ZG230-450的较多，也可以采用球墨铸铁材质，两种材质对比后者的耐磨性和硬度以及耐温性要因为前者。
Pump cover material with steel ZG230-450 more, can also be used ductile iron, the latter two materials contrast of wear resistance and hardness and heat resistance to be because the former.
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