How does a pneumatic dry bulk trailer work?

What is a pneumatic trailer?

Pneumatic trailer is known as a pneumatic tanker, dry bulker tanker, cement tanker, or lime powder tanker.

The pneumatic trailer is composed of a running system, loading tank, air system, and unloading system. It is suitable for bulk transportation of dry powder materials (diameter ≤ 0.1mm), such as fly ash, cement, lime powder, ore powder, granular alkali, etc.

40 ton pneumatic cement trailer

The vertical unloading height reaches 15m, and the horizontal conveying distance reaches 5m. Cement bulkers are widely used in cement factories, cement warehouses and large construction sites.

Generally speaking, the cement trailer is usually used in cement plants, construction sites, etc. It is a special vehicle, which is widely used in industry, agriculture, commerce, power plants, construction, and so on. Pneumatic trailer can reduce many costs in packaging and unloading.

How long is a pneumatic trailer

The pneumatic trailer length: 8500-12500mm, 8,500-12,500 meters.

Related: flour tanker trailer

How does a pneumatic trailer work?

The working principle of the pneumatic trailer is that the engine transmits power to the air compressor through the transmission device, compressed air enters the tank, and the powder material is fluidized through the fluidized bed.

When the pressure reaches 0.2Mpa, due to the pressure difference between the inside and outside of the tank, the powder materials are transported along with the air to the designated position outside the tank through the discharging pipe. Fast discharging and low residual ash rate are the advantages. Related: What is a bulk cement trailer?

50cbm cement bulker 8
Pneumatic trailer for sale

How to load a pneumatic trailer

  • 1. Open the pressure relief valve first and discharge the remaining compressed air in the tank.
  • 2. Open the filling manhole cover and place the filter.
  • 3. Start loading cement into the tank.
  • 4. After loading, wipe off the cement on the sealing ring and then close the manhole cover tightly.
  • 5. Close the pressure relief valve, and check the valves such as the discharging butterfly valve to prevent cement leakage during transportation.

How to discharge the pneumatic trailer

1. Discharge pipe: Connect with the discharge pipe, and put the sealing ring when connecting with the discharge pipe. Open the front and rear air inlet valves. Close the pressure relief valve, external air source valve, secondary blowing valve, and discharging butterfly valve.

2. Air compressor: Start the engine and the air compressor smoothly. Then gradually give more fuel, so that the air compressor can reach the rated speed and inflate the cement tank.

3. Blow valve: When the pressure rises to about 0.15MPa, open the secondary auxiliary blow valve to clear the discharging pipe, make sure that the discharging pipe is not blocked, and then close the secondary auxiliary blow valve.

20 cbm dry bulk tanker trailer

4. Start discharging: When the pressure rises to 0.2MPa, open the discharging butterfly valve to start discharging.

5. Clean: When the pressure drops to about 0.02MPa and becomes stable, the cement in the tank is almost fully discharged and the warehouse is started to be cleaned.

6. Closed: Close the front air intake valve and just make the rear air intake valve work. Observe the pressure gauge. If the pressure rises, it indicates that there is still residual material at the rear of the tank. After the pressure rises and then falls back to and keeps about 0.02MPa, it indicates that the rear part is unloaded.

If the pressure does not rise again, the rear part has been discharged. After confirming that there is no material left at the rear of the tank, open the front intake valve, and close the rear valve to clean the remaining material at the front of the tank. Similarly, observe the pressure gauge.

If the pressure value rises, it indicates that there is still material in the front of the tank. When the pressure rises and falls to and keeps at about 0.02MPa, it indicates that the front is cleaned. If the pressure does not increase, there is no material left in the front.

7. Complete: After confirming that there is no material left at the front or the rear of the tank, turn off the engine, stop the air compressor, open the pressure relief valve, close the discharging butterfly valve, remove the discharge quick connector, and return the discharge pipes to the vehicle. Finish unloading.

How to unload a pneumatic trailer fast

If we want to unload the pneumatic trailer fast, we need a good air compressor.

What is the difference between a pneumatic tanker and a concrete truck?

Pneumatic tanker trucks are usually called cement transport trailers, also called cement bulk loaders. Cement is transported in bulk state in big tanks (not in bags). It is usually discharged through the pipeline with the help of an air compressor.

40 ton pneumatic cement trailer
40 ton pneumatic trailer

The concrete truck transports the prepared concrete mixture to the construction site. It is also called a truck mixer or transport mixer (TM) or concrete mixer. The drum mounted on the truck is a concrete mixer with blades inside. The raw materials required for the concrete are filled into the TM and transported to the working site.

What does a pneumatic trailer do?

The working method of the pneumatic trailer is to make compressed air into the pipeline and then into the powder tank, in order to do the unloading work. Therefore, the pneumatic trailer can be used to haul various dry powder materials.

Best-selling pneumatic tanker trailer recommended

1. 50 Ton Pneumatic Trailer For Sale

Loading rate: >98% fully filling

Residual rate: <0.3%

Delivery height: >30m suitable most silo

Faster unloading: >1.5ton/min

cement tanker2

2. 2-3 Axle 30-38 CBM Pneumatic Trailer

Transport: cement, sand, flour, and other granular materials, etc.

Discharging speed:1.5 tons/minute.

Supply Ability: 200unit/Sets per Month.

40 ton pneumatic cement trailer

 3. 40 Ton Bulk Cement Tanker Trailer For Sale

35cbm cement trailer 7

Panda Mech is 40 ton pneumatic tanker manufacturer from China. We supply 35 cbm pneumatic tanker truck for sale. 35 cubic meter cement trailer capacity 40 tons.

4. 85 Ton Cement Trailer For Sale

Panda Mech is 85 Ton pneumatic trailer manufacturer from China. We supply 85 Ton pneumatic trailer for sale. 70 cubic meter pneumatic truck trailer capacity 85 tons.

85 Ton Cement Trailer For Sale


If you want to purchase pneumatic tanker truck trailers or have questions about the cement bulk trailers, leave a message to us. PANDA MECH is your best choice. As a professional manufacturer with decades of production experience, we have provided various production solutions for tens of thousands of users in and abroad.

We can help you to choose the most suitable pneumatic trailer. Also, we can provide comprehensive after-sales service, whether it is about the operation, reparation, or maintenance.