What are Positive Displacement Blowers
                     What are Positive Displacement 
Blowers
Tuthill Blowers offers a wide range of blower 
packages, Positive Displacement Blowers and 
custom-designed solutions to suit the unique 
design requirements.
A positive displacement blower, also known as a PD 
blower or rotary air blower, is a machine used to 
transport gas or air for various purposes. Positive 
displacement technology is used in these systems, 
which capture a certain amount of air before 
discharging or pushing it out against the system 
pressure. This air usually gets pushed into a pipe or 
hose to transport goods or gas to a specific 
location.
Let's have a look at how they are helpful for different industrial purposes.
HANDLING AND PACKAGING: Blowers can be used as an alternative to vacuum 
pumps in low-vacuum packing and handling uses.
VACUUM PACKAGING: To prolong the shelf life of food items, vacuum pumps must 
be used in the packing process. Vacuum pumps are commonly used to collect air 
and remove water vapor, fat, and granular materials such as seasonings. In the 
chamber manufacturing stage, food is placed inside a vacuum bag and packed into 
a packaging compartment. The bag is heat-sealed after the air evacuates.
THERMOFORMING: The thermoforming process is used to wrap various materials in 
plastic films or preformed trays. For making a container, heated plastic sheets are 
put over a shaping die. If the substance has cooled, it is inserted into these 
containers, and the upper film is heated and secured to the bottle. Thermoforming 
speeds up packaging efficiency significantly.
BOTTLING: Vacuum is used to equalize friction and fluid flow throughout the bottling 
process. Contaminants would also need to be collected using vacuum pumps when 
bottling consumable drinks. Carbon dioxide is pumped into beer bottles during the 
bottling process to minimize the volume of oxygen within the bottle. When the bottle 
is filled with alcohol, the filler can also inject a tiny portion of inert gas on top of the 
beer, expelling the oxygen.
PNEUMATIC TRANSPORTATION: Positive displacement blowers use in pneumatic 
conveying is to efficiently move dry bulk material from one location to another at 
different pressures and vacuum conditions. Dry bulk content is transported into a 
sealed pipeline containing rice, cornmeal, ingredients, whole grains, soy meal, or 
meat by-products within the food industry. A variety of blower models with tri-lobe 
rotors and specially-tuned housings are available to minimize blower noise.
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