Float balls are objects that easily float in most fluids in the world due to the material used to make them as well as their shapes. Spherical and cylindrical float balls are the most common. The material used to make float balls must be strong but must also be buoyant. The material must also be flexible enough to hold on to pressure.
The main use of float balls is in monitoring fluid levels within containers. They can hence be used for surface demarcation of fluid levels. Checking of fluid levels also allows float balls to be used in translucent balls. Buoyancy is the main premise on which float balls work. The specific gravity of the material to be used must always be less than that of the fluid in which the float balls are to be used. This is the main guidance to the material used for float balls.
Most float balls are either made of plastic or stainless steel. Several factors inform the choice of these two materials. First of all, plastic is very light hence it floats easily in all fluids universally. This is why it is used in many situations for making float balls. However, other factors must come into play. Fluid type is one of such factors.
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Some fluids tend to have chemical reactions with plastic. Much as plastic is buoyant enough in such fluids one needs a different material to make float balls. The best choice in this case is stainless steel. The reason why stainless steel is a good substitute for plastic in some fluids is mainly because it does not react with many fluids. Reactions between stainless steel and most chemicals are not common.
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Stainless steel float balls are used in different sectors of life. First of all, they are applied largely in the food industry specifically in food processing. Tanks that are used to store fluid ingredients need float balls so as to monitor remaining levels of the fluids. Chemicals in food necessitate the use of stainless steel float balls. Due to the pressure that is emancipated in food tanks, stainless steel is also the material of choice.
Float balls are also used in chemical engineering yet again to check fluid levels. Chemicals that are mainly used in this industry can be corrosive. However, most chemicals used are not known to react with stainless steel. Excessive heating of chemicals in the industry leads to high pressure and temperature. The material used to make float balls for this industry must therefore be strong enough to withstand such conditions. Stainless steel therefore becomes the material of choice. Vacuum trucks that transport liquids such as water and sewage do also use steel float balls to demarcate fluid levels within them.