Professionals and experts tend to classify pumps in a variety of different ways. However, they essentially categorize them in one of two ways:
1. Centrifugal or Roto-dynamic Pumps
2. Positive Displacement Pumps
When it comes to positive displacement pumps, suppliers understand the specifics of this category and know when best to recommend it for an application.
What Is a Positive Displacement Pump?
This category of pump features
* Expanding cavity on the suction side and a
* Decreasing cavity on the discharge side
As the liquid flows into the suction side, the cavity expands. As it flows out, the cavity caves in. At a specific speed, no matter what the pressure of discharge, the pump will produce the same or “constant” flow. This principle of positive displacement (PD) is applicable whatever type of PD pump is in operation.
Types of Positive Displacement Pumps
When it comes to categorizing positive displacement pumps, suppliers and manufacturers separate them into two main classes. These are:
1. Reciprocating PD: These include the following types: diaphragm pump, plunger pump, piston pump
2. Rotary PD: Examples include a rotary lobe pump, rotary gear pump
The divisions within these types include the ones noted above as well as the following kinds:
* Progressing Cavity Pump
* Peristaltic
* Regenerative (Peripheral) Pump
* Screw Pump
* Vane Pump
In these diverse forms, positive displacement pumps find applications in a diverse number of food, beverage, dairy and pharmaceutical industries
Applications of Positive Displacement Pumps
In the various industries noted above, positive displacement pumps fulfill a unique and valuable roll. They maintain a constant volume as they manage an assortment of fluid types. Among the common fluids and the industries they supply are listed below:
* Baked goods – oil, fats, icing, dough, fruit filling, yeast
* Beverages – beer (injection), mash, fruit concentrate, fruit juices,
* Candy – corn syrup, chocolate, gelatin, cocoa butter, sugar
* Canned Foods – stews, pudding, baby food, jams, jellies, relish, potato salad,
* Cosmetics – toothpaste, shampoo, face and body creams, lotions, emulsions,
* Dairy – milk, cream, butter, margarine, yogurt curds, ice cream, soft cheese,
* Dressings – mayonnaise, salad dressings, various liquid sauces
* Flavorings – concentrates
* Meats – pet foods, broth, fats, sausage fillings
This type of pump can positively displace virtually any liquid out of a container with a fixed-volume.
Positive Displacement Pump Suppliers
Positive displacement pumps play a significant role in the beverage, food, pharmaceutical and even automotive industry. While they are not the only option, they are a favorite when it comes time to performing specific tasks. Because they are capable of maintaining a constant speed and flow and handling a variety of diverse fluids, many positive displacement pump suppliersreadily recommend them to their customers.
