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The 4 forces of dish-washing

Attaining the perfect washing of plates, dishes and glasses depends on the efficiency of the cleaning action. Cleaning action is determined by a combination of 4 factors:

1 termicaTHERMAL FORCE use of water at the optimal temperature to achieve the best possible results and efficiency in washing and rinsing... approfondimento
2 mechMECHANIC FORCE is the force the water jets need to have to efficiently remove dirt and bacteria from the surfaces of the dishes... approfondimento
3 timeTIME FACTOR is the optimal time needed in each phase of the washing process... approfondimento
4 chemicalCHEMICAL FORCE is the action of the cleaning products (solvents detergents etc) used during the washing process... approfondimento

 

SPACE1

termicaTHERMAL FORCE

In the washing phase the optimal water temperature is from 50-60°C so as to best take advantage of the cleaning properties of the detergents, and enabling them to best remove even the most resistant dirt and bacteria.

N.B. Contrary to popular belief excessive temperatures have not only demonstrated to be less efficient at removing dirt but can also cause the dirt to coagulate, making it harder to remove. In the washing phase the optimal temperature is maintained at between 50-60°C by the sensors in the drum.

In the rinsing phase the water temperature is between 80 and 90° C so as to be certain of removing even the most resistant germs. A high and constant temperature is needed to assure and efficient rinse.

N.B. Many dishwashing machines also come with a “cold rinse cycle” as an option. These however necessitate a manual drying of the dishes.

 

 

SPACE2

mechMECHANIC FORCE

top

The water in a dishwasher, to be effective must attain the apply level of pressure to the surfaces of the dishes. In the washing phase the water pressure depends on 2 factors:

  1. The specification of the water pump;
  2. The placement and quantity of water jets

In the rinsing phase the water pressure depends on 2 factors:

  1. The localized water pressure
  2. The placement and quantity of rinsing water jets
N.B.If the Local water pressure is under 1.5 BAR we advise you to install a supplementary pump for rinsing. If however the pressure is above 4 BAR a pressure limiter is needed.

 

 

SPACE3

timeTIME FACTOR top

In order to fully take advantage of the chemical, mechanical and thermal forces being applied during each phase of the washing and rinsing cycle tima is an important facto to be considered. Often however during periods of heavy use it becomes necessary to speed up the process as much as possible.

The standard cycle of the traditional dishwasher is in total around 2 minutes , broken down as follows:

  1. Washing: 105 seconds
  2. Rinsing: 16 seconds
N.B. In our range of products the cycle length can vary. For further details see the SAP - SITEMA ACQUA PULITA section.

 

 

SPACE4

chemicalCHEMICAL FORCE top

The efficiency of the chemical force derives from the perfect balance of the following elements:
A- Water composition
B- Detergent
C- Rinse cycle additives

A - The composition of the water used in the wash cycle. Water can contain various salts (soluble and insoluble ) , minerals, metals chlorine and in general these substances can have an impact on the results

N.B. The main enemy of the dishwasher is Calcium. Apart from forming a crust this can reduce the performance of the machine and weaken the effect of the detergents. Hard water (water with more calcium can necessitate a greater quantity of detergent or a special detergent altogether. We would advise in these cases a water softener.

B- Detergent (used in the washing phase) should be chosen on the basis of; The type of dirt encountered (high alkali = more aggressive , or low alkali = less aggressive) The composition of the water (levels of calcium) The type of objects being washed ( glasses, plates china etc..) The detergent needs to be measured on the basis of the level of calcium in the water and one should follow the directions on the packet to measure the correct level of detergent per litre of water.

N.B.

N.B. Because of the fact that the washing power of the detergent is reduced with each wash it is necessary to add more detergent. To wash at an optimal level we would avise the use of an automatic dose measurer (available as an option with all our Traditional ans Silent ranges , and Included as standard with our own range).

C- Rinse cycle additives permit the water molecules to be resisted by the articles being washed and therefore lead to dryer and more “sparkling results It should be chosen on the basis of the composition of the water and the detergent used and the instructions on the packet should be adhered to.

N.B. Because the rinse cycle additives are mixed with the water in the boiler of the dishwasher our entire range comes ready fitted with an automatic dose measurer.

 

SPACECONCLUSIONS

The best wash results therefore are closely connected with the ability to optimise the application of these 4 forces The washing system has been projected to harness these 4 forces assuring the best and most consistent results possible in every phase of the washing and rinsing cycle.

SAP
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