Some of us that will be going into high volume food manufacturing will come across many different terms and equipment. One important equipment in high volume food manufacturing and processing is a positive displacement sanitary pump. This article will introduce you to what this food and manufacturing process equipment is all about.
A pump is a machine or an implement that is installed to assist in the movement of slurries, food products and solutions that are in some form of needed processing. This is done in accordance with set criteria and standards of health and cleanliness which is set either by the company itself or an outside regulatory agency. In the United States, these regulatory agencies are the United States Department of Agriculture and the Food and Drug Administration.
Food processing sanitary pumps come in two types. One is a centrifugal type pump, which uses centrifugal force to pump fluids or mush right along, and the other is a positive displacement pump. The latter makes uses suction via rotating lobes in different fixed chambers. Either way, both are designed to prevent bacterial growth in the process.
PD, pumps, another name for these displacement pumps are not as widespread as centrifugal ones. They are however, fast gaining in popularity for special applications, which involve viscous liquids, or liquids that contain, some form of fragile solids. They are not capable of high flow rates as centrifuge mechanisms but they can produce much higher flow pressures.
PD pumps rely on rotating part to directly push liquids in an enclosed chamber until enough pressure has built up. When this is achieved then it is pushed on to a discharge system. This is much slower in velocity than a centrifuge mechanism and so much more desirable when dealing with liquids with some form of inert solid matter that is fragile in nature.
As such there are two types of PD pumps. One is the rotary type which uses rotating parts only to move liquids. This is most useful for liquids that have some solids in them. The other type of PD pump is the reciprocating pump, which also makes use of vacuum pressure for applications that require the elimination of reverse flow. Reverse flow is of major concern especially when filtration and such are required.
The sole advantage of the PD type of mechanism is that it can provide a constant flow of liquid within the range of medium to high pressure applications. This is particularly important in breweries and dairy production facilities which deal a lot with viscous liquids. Other viscous fluid applications best serviced by PD type mechanisms are found in firms that produces vegetable oils, molasses and such.
Hopefully this short article has been of some use in enlightening the reader as regards PD pumps and their use in the food industry. It is by no means an exhaustive treatise on a somewhat technical subject but hopefully it has put some of the technical jargon into simple terms as much as possible to elicit understanding.
A pump is a machine or an implement that is installed to assist in the movement of slurries, food products and solutions that are in some form of needed processing. This is done in accordance with set criteria and standards of health and cleanliness which is set either by the company itself or an outside regulatory agency. In the United States, these regulatory agencies are the United States Department of Agriculture and the Food and Drug Administration.
Food processing sanitary pumps come in two types. One is a centrifugal type pump, which uses centrifugal force to pump fluids or mush right along, and the other is a positive displacement pump. The latter makes uses suction via rotating lobes in different fixed chambers. Either way, both are designed to prevent bacterial growth in the process.
PD, pumps, another name for these displacement pumps are not as widespread as centrifugal ones. They are however, fast gaining in popularity for special applications, which involve viscous liquids, or liquids that contain, some form of fragile solids. They are not capable of high flow rates as centrifuge mechanisms but they can produce much higher flow pressures.
PD pumps rely on rotating part to directly push liquids in an enclosed chamber until enough pressure has built up. When this is achieved then it is pushed on to a discharge system. This is much slower in velocity than a centrifuge mechanism and so much more desirable when dealing with liquids with some form of inert solid matter that is fragile in nature.
As such there are two types of PD pumps. One is the rotary type which uses rotating parts only to move liquids. This is most useful for liquids that have some solids in them. The other type of PD pump is the reciprocating pump, which also makes use of vacuum pressure for applications that require the elimination of reverse flow. Reverse flow is of major concern especially when filtration and such are required.
The sole advantage of the PD type of mechanism is that it can provide a constant flow of liquid within the range of medium to high pressure applications. This is particularly important in breweries and dairy production facilities which deal a lot with viscous liquids. Other viscous fluid applications best serviced by PD type mechanisms are found in firms that produces vegetable oils, molasses and such.
Hopefully this short article has been of some use in enlightening the reader as regards PD pumps and their use in the food industry. It is by no means an exhaustive treatise on a somewhat technical subject but hopefully it has put some of the technical jargon into simple terms as much as possible to elicit understanding.
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