(1) after the equipment is emptied, re-run, the gas is not exhausted quickly pressurized operation. Should be under the pressure of the system to exhaust the remaining air, and then gradually pressurized operation.
(2) in the pretreatment equipment and high-pressure pumps between the joints of bad sealing or leakage (especially micron filters and their pipeline leakage) when the pretreatment water supply is not sufficient, such as micron filters clogging, in the sealing of the place due to the vacuum will be sucked into part of the air. Should be cleaned or replaced micron filter to ensure that the pipeline does not leak.
(3) whether the operation of each operating pump is normal, whether the flow rate is the same as the specified value, and compared with the pump operating curve to determine the operating pressure.