(1) Preparations before operating the sand pump:
When using it for the first time, ensure that the motor rotation direction matches the direction marked on the pump casing. Reversing the rotation will eject the impeller, causing the impeller to hit the front guard plate and tear the threads, which will quickly damage the pump.
Rotate the pump shaft by hand, ensuring smooth operation and no friction noise.
Check the rotation direction, ensuring it matches the direction indicated on the pump body.
Fully open the suction pipe valve.
Fill the pump body and inlet pipe with liquid to expel air.
When the pump outlet is connected to pressure equipment, a check valve must be installed between the throttle valve and the pump outlet to prevent liquid backflow. Otherwise, backflow will cause water hammer and damage to the pump.
(2) Sand Pump Operation:
After all preparations are completed, start the motor.
After the motor is running normally, check if the ammeter display on the motor start-up control cabinet is normal. If it exceeds the motor’s rated current, adjust the throttle valve appropriately to keep the motor current within the rated current, ensuring the pump and motor operate efficiently and safely at their design points.
After starting and running for 1-2 minutes, open the discharge gate valve and adjust the sand pump pressure. Observe the pump’s operation carefully. If the pressure and flow rate of the sand pump are too high or too low, or if the motor overheats, adjust the opening of the outlet valve appropriately until the pump runs smoothly.
After the pump has been running normally for 2 hours, check the bearing temperature rise. The bearing temperature should not exceed 80°C or the temperature specified in the product instruction manual.
If there is severe vibration, abnormal noise, or other abnormal phenomena, immediately disconnect the power supply to prevent accidents and investigate the cause and troubleshoot the problem.
(3) Sand Pump Shutdown and Storage:
Disconnect the motor power supply to stop the pump.
If you stop the pump for a long time and the ambient temperature falls below 0 ℃, drain the liquid from the pump to prevent the pump casing from freezing and cracking. If you stop the pump for an extended period, clean, oil, and package it for safekeeping.
