1. Determine the type of soil you are cleaning
Choosing the right nozzle is dependent upon the type of soil being cleaned. Lechler classifies soils into 5 Cleaning Efficiency Classes that range from light, medium and persistent. Once the cleaning efficiency class is defined, the nozzle selection can be narrowed down.
2. Select the right tank cleaning device
Static nozzles are primarily used for removing light soils or rinsing. These nozzles are found in cleaning efficiency class 1.
Free-spinning nozzles are fluid driven. These nozzles are designed for removing light soils in small to medium sized tanks. When compared to static, these nozzles use less water in shorter periods of time. Depending upon the size of the tank and soil being removed, these nozzles are found under cleaning efficiency class 2 and 3. Lechler offers a wide range of free-spinning nozzles to accommodate various tank sizes and applications.
Controlled Rotational nozzles are used for removing medium to heavy soils. An internal turbine controls the rotation of the nozzle, so that even at higher pressures the speed is maintained. Lechler’s Xact-Clean HP+ provides controlled rotational cleaning and is found under cleaning efficiency class 4.
Gear-Driven nozzles contain internal gears and the spray head rotates on two axes. These jets sweep the entire tank surface to ensure complete spray coverage. These nozzles are used to remove the most difficult soils, where penetration is needed and are classified in cleaning efficiency class 5. Lechler’s 5TA is gear-driven and has been proven in many industries.
3. Proper installation and placement
Nozzle placement is critical, especially if your tank contains agitators or mixing blades. In this case, more than on nozzle is usually required because surfaces could be neglected due to spray shadows. Spray shadows are improperly cleaned areas inside the tank and are caused by obstructions, such as agitators and mixing blades.
For this reason, engineers at Lechler developed TankClean, a simulation software that finds the optimal solution for nozzle placement. Operation of all tank cleaning nozzles can be simulated.