What should I pay attention to when operating mission pump?
OPERATING
！！！Prior to start the motor, make sure the motor rotating direction is kept same with the marked direction on motor housing. Otherwise, reset the motor terminal to make sure the direction is consistent.！！！
- a) If the desander pump is newly installed or re-used after a long period of time, check the lubrication and junction carefully. First of all, lubricant is filled into the seal cavity and the bearing cavity.Never is there foreign matters in the pump cavity.
- b) The impellers of the pump are connected to the pump axle through screw. At the first usage, ensure that the rotating direction is correspondent to that labeled on the pump shell, or the impellers will be removed to touch the protection plate in front of it and the pump will be damadged quickly.
- c) The desander pump should be started at the condition that the suction vavle is open and the exhaust vavle is closed. After running for 1~2min, open the exhaust vavle and adjust the pump pressure. If the pump pressure and flow rate too high or too low, or the motor is too hot, adjust the opening of the exhaust vavle till the pump is running stably.
- d) When the fluid surface in the circulation tank is low, turn off the pump and restart it after the tank is filled. Vapor crrossion can be avoided.
- e) In cold season or for a long time of no running, remove the screw plug under the bottom of the pump shell to let the fluid out for preventing it from condensing.
- f) Often check the temperature of the pump axle and bearing. Not higher than 40℃(the total temperature is ambient temperature +40℃).
- j) If abnormal sounds occur in operation, stop running at once. Restart the pump after troubles are disposed.
- h) The new desander pump and its seal apparatus have been carefully tested and checked after production. Do not wrench or take out the adjustment screw.
- Troubleshooting
| Trouble | Causes | Guidance |
| Pump pressure and flow rate too low | Impellers too small | Replace with bigger ones |
| Bad seal of pipe junction, serious leakage | Better junction | |
| Suction and exhaust pipes too long and benting | Shorten and straighten them | |
| Foreign matters barring in suction pipe | Clean out | |
| Suction vavle not open wide | Open it widely | |
| Pump pressure and flow rate too high | Too big impellers | Replace with smaller ones |
| Bearing surface too hot | Bearing clearance too small, so too much rolling friction | Adjust the bearing clearance |
| Abnormal sounds during running | Pipes or junctions broken | Repair or replace |
| Junction loose | Tighten | |
| Serious leakage at the sealed part | Mechanical seal fails | Sealed by packing |