Vacuum Pumps - Rotary Vane Pumps - Self Priming Pumps

Essentially, centrifugal pumps are used in industries that need to transport liquids from one point to the other. To increase the fluid pressure and move the pressure through a central piping system, centrifugal pumps use centrifugal force and rotating impellers. These pumps are accompanied by an in-built robust mechanical seal that protects the inner shaft of the pump.

Depending on the usage, centrifugal pumps are available in different types. The most common type being single-stage centrifugal pumps. However, for higher pressure and enhanced quantity of liquid, industries prefer to use multi stage centrifugal pumps. They encompass more than single impeller mounted on common or separate shafts.

Another category of centrifugal pump includes magnetic drive pumps. This class of pumps are the most advanced, sophisticated and expensive type. Magnetic drive pumps use magnetic field to link a motor and an impeller with pump fluids and this facilitates to increase its pressure. Because of the presence of magnetic field, it does not require shaft or seal between the motor and impeller unlike single-stage pump. This feature renders magnetic drive pumps the edge over the other pumps and significantly reduces the internal corrosion, contamination and friction loss.

Adding to the list of different categories of centrifugal pump is self priming centrifugal pumps. A self priming centrifugal pump is designed for economical and trouble-free pumping of water, slurry, dyes, oil etc. It is fabricated to include a large volute that allows it to re-prime itself when under lift conditions. It eliminates the need for suction as well as discharge check valves thus providing prolonged operation without the problems of clogging.

There are different types of vacuum pump available in the market. Each one has its own unique features that makes them different from others. This is where liquid ring vacuum pump is most preferred by the different industries for different applications.

Liquid ring vacuum pump is a member of the rotating displacement pump family which is known for its low price and wide range of applications. Also these type of pumps are well known for low maintenance and its long lasting nature, which makes it popular among the industries. The only drawback of this type of pump is that it cannot be used for large industrial applications. These pumps compress the gases by using the rotator vanes located within the cylinder shaped casing. Then water or any other liquid is forced into the pump and the centrifugal force inside the pump causes a ring to form around the inner lining of the casing. A series of seals are used to create separate compression chambers. Gases becomes trapped in these chambers and become compressed.

The next question that arises is where to find liquid ring vacuum pumps. These pumps can be found offline as well as online. But most of the clients would think of directly ordering them online. It is better to purchase the product directly from the manufacturers. But for this the exact name of product is necessary. Also it is necessary to know whether purchase can be made directly from the manufacturer's website. For example, if the product's name is Siemens model 2B, it is better to make the purchase from the official Siemens website.

It is also important while purchasing that you know everything about the different makes and models of liquid ring vacuum pumps that are available in the market and for what applications they are used as every model of the pump cannot perform every function. Even ignoring a single thing about the pump could lead to a wrong investment by the purchaser.

There are few other questions to ask before making a purchase such as following:

• Operating range and cut in point for the machine.


• Highest level of pressure at which it can operate constantly


• Highest temperature at which it can operate.


• Temperature at which the system will automatically shut down.