Pump (Diaphragm metering pump) operation and maintenance: (A) drive: 1, hand pressure compensation before driving the valve stem, this time, one side of the membrane cavity filled with oil, one side of the gas discharge chamber, until the bubble No longer upstairs. 2, after driving, the pump plunger for inhalation movement (no pressure in the discharge tube) The above method will be compensated valve stem pressure to open several times the safety valve to jump open, so that the safety valve at the air discharge until the bubble discharge until. 3, at this time if the impact of sound or vibration phenomenon, indicating excessive fuel, should be in the plunger for the discharge stroke, the light pressure compensation valve stem for short-term drainage, so that the extra discharge until the vibration or shock After the sound is removed, the pump runs smoothly. (B) stop: cut off the power, stop the pump running. Close the import and export pipeline valves, shells should pay attention to open before driving. (C) Maintenance: 1, lubricating oil replacement: January to replace the oil, adding qualified amount of 23 # or 30 # mechanical oil. Pump in operation, the main part of the temperature provisions: the motor allows the maximum temperature of 70 ℃; adjust the base oil temperature not exceeding 65 ℃; filler and the temperature does not exceed 70 ℃. 2, the leakage loss: pump in normal operation, the leakage shall not exceed 15 drops per minute, 2), 3) in the event of excessive, should contact the relevant units for processing to eliminate hidden dangers.