The double - dimensional adjustment of the output flow of the metering pump can be realized by adjusting the travel length and the reciprocating frequency when the pump - level pump is determined in the metering medium and working pressure. Imported trip length and reciprocating frequency can be as a moderating variable, but in the engineering application generally speaking as coarse variable, reciprocating frequency, fine tune the variables: stroke length adjustment to a certain value, and then change its frequency to achieve fine adjustment, increase metering pump adjusting flexibility depending on the length of stroke. In the relatively simple application occasions, can also manually set the length of travel, only the stroke frequency as a variable, thus simplifying the system configuration.

When the submersible pump should pay attention to the following points:

(1) when the submersible pump work, pay attention to the situation of the water level dropped, the submersible pump not out of the water outside the work.

(2) when the use of submersible pump stop, the water is less, there is noise and heat protector frequently take off phenomenon, should stop the pump.

(3) check whether the power supply voltage is too low or the power cable, broken or missing phase.

(4) check the impeller with and without jamming or wear, outlet chamber is blockage, head is too high or too low, the screen whether congestion. If there is fault, find out the corresponding measures of resolved.

(5) in case of stator winding fault to send burned, repair unit repair. Re assembly, sealing parts need to do 0.2MPa pressure check.

(6) diving pumps. It is found that the cable damage promptly replaced, can be used. If there is a period of time without, submersible pump should not be soaked in water should be clean, such as submersible pump is used for pumping viscous slurry should be put in the water through running a few minutes, wash pump grout and dry coated anti rust oil, stored in gout and dry place. Condensate pump