Vacuum pump is pump used for air suction. In some type, it can almost completely pull out the internal air. Vacuum pump is used in a wide range of industries such as food industry, refrigeration industry and in scientific laboratories. Types of vacuum pump can divided into 4 types:
1. Diaphragm vacuum pumps
This vacuum pump is classified as oil free type because of no lubrication needed. Major parts is diaphragm which is synthetic rubber plate. This diaphragm, installed vertical direction, moves up and down to create air movement and vacuum power. There are no friction parts so there is no lubrication required. Other advantage of using flexible parts like diaphragm is low noise in operation.
One of famous vacuum pump brand is GAST from U.S.A. The most popular model is DOA-P504-BN. The pump body is compact as the system does not require much movement of the internal components. On the other hand, suction power is not very high due to compact body. Diaphragm vacuum pump is suitable for liquid filtration. It can be used for applications that are not very viscous liquids substance or research Lab.
2. Rotary vane vacuum pump
Its working principle is air movement from vanes that are installed in rotor inside vacuum pump. This rotor rotates is driven by motor connected through coupling. There are both lubricated type and oilles type depending on vane material.
This vacuum pump system can generate more deeply than other systems. OP is a famous brand of vacuum pump from JAPAN. The popular model is DV series. It is often used in large industrial plants, chemical plant, wood drying plant, packaging plant and cooling system.
3. Rocking Piston vacuum pump
This type combines advantage of 2 systems; diaphragm and piston. It has piston rod driven by electric motor. On top of piston is diaphragm plate which will move up and down by piston movement. By this working principle, it maintain oil free and silent operation of diaphragm while create deeper vacuum power and higher air flow at the same time from piston principle. Rocking piston vacuum pump is applicable in variety application such as sprinkle.
GAST from U.S.A. is a leader in rocking piston technology. The popular model is 87R655-V114-N470X.
4. Water ring vacuum pump
Basically it is a water-cooled vacuum pump instead of using air cooled or oil cooled. Sometime it is called liquid ring vacuum pump depending on type of liquid. This vacuum pump is commonly used in high temperature environment such as chemical plants and textile works.
OP from JAPAN is one of producer that has latest technology in water ring vacuum pump. OP-W series is widely used and accepted as key vacuum pump in industries.
In conclusion, there are main 4 type of vacuum pumps; diaphragm vacuum pumps, rotary vane vacuum pump, rocking Piston vacuum pump and water ring vacuum pump. Each is suitable in different circumstance.
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