What high pressure cleaner? Is it better pressure or delivery rate?
The right criteria to define the high-pressure cleaner performances is the washing effectiveness. The elements that influence this value are: delivery rate (water volume processed by the pump in a unity of time) and pressure (l/h water power on a surface). The higher the delivery rate, the faster the washing phase (less rinsing time); the higher the pressure, the deeper the washing (better dirt degreasing). It is often emphasized the pressure only (also because the pump size and the consequent manufacturing cost are cheaper), but delivery rate is as important as pressure.
What pump? Is it better a linear (crankshaft) or an axial one?
It does not exist a winning technology, because both solution can provide same performances and lifetime. What determines the pump quality is the quality of the project itself (linear or axial) and of the components used; for this reason Lavorwash decided to develop both technologies, taking into consideration a design that grants margin of safety and reliability.
What design? Is it better horizontal or vertical construction?
The design of a cold water high-pressure cleaner can have an horizontal development (ex. DANUBIO) or a vertical one (ex. MICHIGAN) and also the pump position follows the orientation of the structure. The vertical development is much more ergonomic for the user, because machine moving and storing after use are much easier, but these benefits raise manufacturing cost. The horizontal development allows an easier pump service if needed, better stability and a lower manufacturing cost.
Why a hot water high-pressure cleaner?
It is necessary the use of a hot water high-pressure cleaner whenever it is necessary to degrease oily or particularly tough dirt in the shortest time possible. Washing efficiency of hot water is much higher that the cold water one (up to 50% higher on some kind of dirt), because heat assists dirt degrease. Heat effect on the surface produce also fast drying. With the use of a hot water high-pressure cleaner it is possible to have: shorter washing time (under the same kind of dirt), better degrease of non water-soluble dirt , shorter drying time and less quantity of chemical product used: in few words, lower cleaning fixed costs.
It is a gas oil heater that raises water temperature coming out of the pump; the difference between inlet and outlet water temperature is technically indicated like DeltaT. Under the same conditions, increasing the delivery rate (quantity of water to be heated) the Delta T decreases proportionally. It is easy to understand why high pressure cleaners with higher delivery rates have more powerful burners: to grant the best operating temperature in each working condition. All our boilers have thermal output very high, near 90% or higher. This means that the relation between usable obtained power (Delta T impressed in water) and power consumption (gas oil) to produce that power is very high.
What changes among high-pressure cleaners with similar performances?
It is necessary to consider besides pressure and delivery rate also the standard equipment (dimensions and type), optional functions (antiscale, total stop, etc.) and the manufacturing specifications (type of materials and applied technology). Nevertheless the most important aspect is the resistance to wear and tear and to continuous use, that raises progressively with the increase of manufacturing components specifications or moving up from a model to the next class one. Boiler dimensions, in other words coil and gas oil consumption, determine the thermal power of the burner.