1. If the pump starts to leak after a slight phenomenon should be observed for some time.
Such as continuous operation for 4 hours, the leakage is still not reduced, you should stop the pump check;
2.pump operating pressure should be smooth
the pressure fluctuation is not greater than 1 kg / square centimeter;
3.pump in operation, should avoid the occurrence of evacuation phenomenon
so as to avoid dry sealing and sealing seal damage;
4. Sealing situation should always be checked. During operation
when the leakage exceeds the standard, heavy oil is not more than 5 drops / min, light oil is not greater than 10 / min, such as 2-3 days there is no better trend, you should stop pumping pump check seal device.