1, Loading

1.1, Before open the manhole, firstly must open the relief valve of tanker, and check the inner tanker pressure is equal to atmospheric pressure, i.e. the pressure gauge value is zero.

1.2, After open the manhole, check if there was agglomerate of powder material in the tanker, especially the tanker ever loaded powder material and was off duty for long time. In case there was the agglomerate, must get rid of it.

1.3, After material loaded, check manhole seal ring is with power material or not, if yes, clean it to ensure the sealability.

2, Unloading

2.1, Connect the discharge hose of tanker to the needed place, ensure the sealability.

2.2, Close the discharge butterfly valve, outside air supply valve and the assistance air valve.

2.3, Start the engine of truck, when the brake pressure reached at 392KPa, depress the clutch pedal, engage PTO, then release pedal slowly. After the compressor run smoothly, then accelerate to the rated speed and supply the pressed air to tanker.

2.4, When the pressure gauge value reaches to 196KPa, open the discharge valve. During the unloading period, if the pressure raised and tend to exceed 196KPa, that means the discharge pipe was blocked.

2.5, Control the gas pedal, keep the discharge pressure between 185 and 196KPa. The normal bulk cement discharge speed is 1.1mt/min. When the tanker is empty, the tanker’s pressure would be 9.8-19.6KPa, at this moment open the air assistance valve, make sure all the powder material in discharge pipe blew out.

2.6, Release gas pedal, depress the clutch pedal and disengage PTO, stop the compressor.

2.7, Open the relief valve of tanker, exhaust the remaining pressed air in tanker, make the inner pressure equal to atmospheric pressure.

2.8, When the unloading horizontal distance is over 5 meters or vertical height is over 15 meters, after open the discharge butterfly valve, the assistance air valve would be open, so that dilute the density of powder material and raise the pumping height.

3, Daily maintenance

3.1, Often check the pressure gauge, if fail show the normal pressure, must be replaced at once.

3.2, Frequently inspect and adjust safety valve, make the safety valve work at the pressure of 180-200KPa.

3.3, Often check the air filter of compressor. The paper air filter need to be cleaned every month. The cleaning method is using pressured air (pressure less than 0.6MPa) to blow the air filter from inside to outside. If the compressor was used in the very dusty environment, the cleaning period need to be shortened. After the filter was cleaned 5 times or very dirty, then it need to be replaced a new one.

3.4, The engine oil of compressor need to be changed regularly, normally every six months