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4. The control procedures and methods for multi-stage pump:

Let’s take the three-stage series pump as an example. Usually the third-stage pump must be equipped with a transducer, and the first-stage pump had better have one too while it is unnecessary to fix one for the second-stage pump. When you use the pump, firstly start the first-stage pump to let all pipelines and the pump be filled with slurry, then gradually increase its revolution to rated speed. Start the second-stage pump and then the third-stage pump. Since the third-stage pump has a transducer, you can adjust system lift and flow by changing the revolution of the third-stage pump. In reverse order, the pumps can be closed. As a result, the investment costs will be greatly reduced by decreasing the quantity of transducers.

5. 關(guān)于泵的控制柜，經(jīng)我公司開會研討認(rèn)為，在現(xiàn)場如果安裝變頻器的話完全可以通過變頻器實(shí)現(xiàn)泵的開停及調(diào)速，如果像上面第四個(gè)所說，只給第一和三級泵安裝變頻器，那么第二級是可以單獨(dú)安裝控制柜來控制開關(guān)的！所以此次我公司不單獨(dú)提供控制柜，如果只需要幾臺控制泵開關(guān)的變頻器，我公司將會免費(fèi)提供！廠家為中國國產(chǎn)品牌！

5. As for control cabinet for the pump, after discussion, we think if we install transducers at site, we can control the pump and its speed by operating transducers. If we only install transducers for the first and third-stage pumps as said in part 4, we can install a separate control cabinet for the second-stage pump to control its start and stop. We will not supply control cabinet this time, but our company can supply several transducers for controlling pumps free of charge. The transducers we supply are from a Chinese home-made brand.

6. 如果商務(wù)和技術(shù)在技術(shù)服務(wù)及培訓(xùn)上有分歧，那么以標(biāo)書中服務(wù)時(shí)間長的為準(zhǔn)！

6. If there are any discrepancies in technical services and training on commercial and technical terms, the longer service period in the bidding document shall prevail.

7. 關(guān)于類似的高揚(yáng)程的泵的業(yè)績介紹，請見附件！

7. Please see attachment for the similar performance lists for high-lift pumps.