Variable pump pressure adjustment steps
1) Adjust the pressure of unloading valve DA10, relief valve DB10 or DB20
to the minimum.
2) Check in the slurry inlet valve and close the
slurry outlet valve to the minimum, that is, the slurry flow rate of the pump is
small at this time.
3) Start the motor, slowly adjust the relief valve
DB10 or DB20 to adjust the mud pressure to be about 0.1Mpa-0.2Mpa less than the
required pressure.
4) Slowly adjust the unloading valve DA10 until the
unloading valve has pressure (that is, the pressure gauge corresponding to the
unloading valve shows less than 0Mpa).
5) If the state cannot be
reached, adjust the unloading valve and the relief valve according to the above
steps 3 and 4 until this state.
6) After adjusting the unloading
valve, tighten the nut. (Note: The pressure of the unloading valve should be
zero at this time, if it is not zero, then slightly lower the pressure of the
unloading valve, and the pressure will only be displayed when it reaches
zero).
7) Open the slurry valve to start normal operation.
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