How to extend the pump usage time - the pump normal starting steps

Before starting the preparation: 1, test the motor steering is correct, from the top of the motor to the pump as clockwise rotation, the test time to be short so as to prevent mechanical seal dry wear. 2, open the exhaust valve so that the liquid filled the entire pump, to be closed after the exhaust valve. 3, check whether the normal parts. 4, hand-crank pump so that the lubricating liquid into the mechanical seal face. 5, high-temperature type should be run preheating, heating rate of 50 ℃ / hour, in order to ensure uniform heating ministries. Start: 1, full import valve. 2, close the discharge pipe valve. 3, start the motor, observe the pump is running correctly. 4, adjust the outlet valve opening to the required conditions, such as users at the pump outlet equipped with flow meter or pressure gauge, the outlet valve should be adjusted by the opening of the pump performance parameters listed in the rated point on the operation, such as users In the pump outlet is not installed flow meter or pressure gauge, the outlet valve should be adjusted by opening; measuring pump motor current, the motor running within the rated current, otherwise it will cause the pump to overload operation (ie, high-current operation, Motor burnout) is good to adjust the outlet valve open large and small and pipeline conditions. 5, check the seal leakage, the normal mechanical seal leakage should be less than 3 drops / min. 6, check the motor, bearing temperature rise ≤ 70 ℃. Parking: 1, the first type of high temperature cooling, cooling rate ≤ 10 ℃ / min, the temperature dropped to ≤ 80 ℃ below, to stop. 2, close the discharge pipe valve. 3, stop the motor. 4, close the import and export valves. 5, such as long-term parking should be drained of liquid pump.