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Energy-saving products in terms of energy consumption is certainly less than non-energy-saving products, but also to use properly. In situations where speed regulation is not needed, such as supplying water to a high-level tank, the frequency converter-driven pump set is not necessarily more economical than the fixed-speed pump set. Open one-way check valve hydraulic booster device without changing the structure of the valve itself, easy to install and maintain, responsive, reliable work. After the installation of the device, the single pump can save more than 10% of energy consumption, saving more than 200 million kilowatt-hours of electricity per year for enterprises. In practical application, it is an important way to make the equipment more energy-saving and environment-friendly to reb the fluid equipment or add the auxiliary equipment. Electricity, because the frequency converter joined, many a frequency converter efficiency discount. In a group of pumps if only one pump speed, the result is not necessarily energy-saving. In short, the improper use of inverters instead of more power consumption. According to the comparison of practical application, the micro-contact shaft seal not only solves the problems of poor sealing, frequent air leakage and water leakage, long time of vacuum pumping, large loss of maintenance material and manpower, etc. . Moreover, the mechanical friction power consumption is reduced. The energy-saving advantage of micro-contact shaft seal compared with common stuffing box and common mechanical seal. The friction power consumption of the new type micro-contact seal is superior to that of the packing seal in energy saving. After the check valve of lift pump is installed with hydraulic booster device, the pump power reduces the working efficiency obviously. Comparing the power consumption of the new type shaft seal with that of the ordinary shaft seal, at the present stage, from the point of view of the refining and chemical enterprises, the various energy-saving equipment and the equipment after energy-saving transbation adopted by the company are not enough to fully meet the requirements for matching the whole set of equipment, some aspects have not done enough, there are some continue to transb and tap the potential of the feasibility of efficiency requirements. A common b to realize load matching in conveying system is to use eddy current drive. The device makes use of the advantage of ignoring the accumulated error in the eddy current drive. This b only requires one vertical controller to drive two or more electromagnetic sliding clutches. The controller is usually a small single-phase SCR Bridge to provide stable DC current for the clutch. In order to realize the control of each clutch, adjust the torque on each clutch and realize the mechanical load sharing