Advantages of suction excavators vs. vacuum truck
SUCTION EXCAVATOR - A FAN-BASED MULTI-TALENT
The fan is at the heart of the suction excavator. It generates an enormous air flow with which the material is entrained. The complex air flow system inside the container enables the separation of the entrained particles. To do this, we make use of the law of gravity.
VACUUM CUPS - A PRESSURE-CONTROLLED ADDITION TO THE FAN
The pump generates the vacuum. The pressure difference between the tank and the outside environment draws the material into the tank. The larger or higher the pump capacity, the greater the vacuum created.
WHAT THE SUCTION EXCAVATOR CAN SUCK UP
Suction excavators are particularly suitable for vacuuming dry materials such as sand, soil, gravel and stones. However, sludge and water can also be extracted with a suction excavator. RSP suction excavators are ideal for rapid deployment in the area of underground supply lines, but also for cleaning sewer systems and industrial plants.
WHICH MATERIALS PUMP VACUUM TRUCKS
The suction truck is used to extract liquids from normal shafts or pits. However, these vehicles can also extract materials such as sludge or powdery substances. They are rather unsuitable for extracting materials such as soil, sand, gravel and stones. The pump performance is insufficient for this.
SUCTION EXCAVATORS TILT TO THE LEFT OR RIGHT
Suction excavators offer the option of emptying the container to the right or left. You can tip into skips, containers or directly onto the ground. Sucked liquids can be drained using a pump and drain valve on the passenger side.
VACUUM CUPS TILT BACKWARDS
vacuum truck simply pump out liquids. However, it is more difficult to empty solids from the tank. This requires the tank to be tilted very steeply. The necessary tipping angle is not ideal for filling skips evenly.
WHAT VOLUME AIR FLOW IS GENERATED?
In a direct comparison, the vacuum suction truck and the suction excavator are very far apart. This is due to the two different operating principles. The fan of the suction excavator generates a volume air flow of 42,000 m³. This high volume air flow is required to entrain the material. In contrast, for the vacuum suction truck, the vacuum required to transport the material is the decisive factor.
REQUIRED VACUUM
In order to work efficiently, the suction excavator requires a balanced ratio between the volume air flow and the resulting negative pressure. This is exactly the opposite for vacuum suction cups. The pumps generate a high negative pressure, but vacuum trucks require an increasing volume air flow the deeper they want to vacuum.
USABLE POWER
The power generated by suction excavators can be used for the suction process without major losses. The situation is different with vacuum suction vehicles. A maximum of 85% of the vacuum generated by pumps can be used. Regardless of which suction vehicle is used, the decisive factor is the possibilities it offers in use.
WORKING IN DEPTH
A powerful suction excavator can suck up material from a depth of 40 m. For vacuum suction vehicles, the deeper the suction, the more air must be added. The thicker and the deeper the medium to be suctioned, the thicker the suction hoses need to be and the more important the factor of added air becomes. For this reason, thicker media and deep suction work is better carried out with suction excavators.
HORIZONTAL DISTANCE
For suction work over a greater distance horizontally, similar distances can be achieved with both suction principles. The key factor here is the material to be conveyed.
SUCTION HOSE DIAMETER
Most suction excavators work with a suction hose diameter of 250 mm. On request, 300 mm have also been installed. Only our small entry-level models work with a suction hose diameter of 150 mm, as do all conventional vacuum sweepers. Depending on the intended use, both large and small models have proven themselves in daily use, but the 250 mm diameter offers more options for transporting larger suction material.
