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Difference between revisions of "Diaphragm Pumps"
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[[Category:Pumps]]{{Knoppen}} | [[Category:Pumps]]{{Knoppen}} | ||
[[File:Diaphragm Pump.jpg|thumb|right|Diaphragm Pumps]] | [[File:Diaphragm Pump.jpg|thumb|right|Diaphragm Pumps]] | ||
[[File:Diaphragm Pumps1.jpg|thumb|right|Diaphragm Pumps]] | [[File:Diaphragm Pumps1.jpg|thumb|right|Diaphragm Pumps]] | ||
'''Diaphragm Pumps''' also known as [[Membrane Pumps]], are positive displacement pumps that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable [[Valves]] either side of the diaphragm to pump a fluid. | '''Diaphragm Pumps''' also known as [[Membrane Pumps]], are positive displacement pumps that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable [[Valves]] either side of the diaphragm to pump a fluid. | ||
==Types== | ==Types== | ||
There are three main types of diaphragm pumps: | There are three main types of diaphragm pumps: | ||
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* Those employing one or more unsealed diaphragms with the fluid to be pumped on both sides. The diaphragm(s) again are flexed, causing the volume to change. | * Those employing one or more unsealed diaphragms with the fluid to be pumped on both sides. The diaphragm(s) again are flexed, causing the volume to change. | ||
When the volume of a chamber of either type of pump is increased , the pressure decreases, and fluid is drawn into the chamber. When the chamber pressure later increases from decreased volume , the fluid previously drawn in is forced out. Finally, the diaphragm moving up once again draws fluid into the chamber, completing the cycle. This action is similar to that of the cylinder in an internal combustion engine. | When the volume of a chamber of either type of pump is increased , the pressure decreases, and fluid is drawn into the chamber. When the chamber pressure later increases from decreased volume , the fluid previously drawn in is forced out. Finally, the diaphragm moving up once again draws fluid into the chamber, completing the cycle. This action is similar to that of the cylinder in an internal combustion engine. | ||
==Characteristics== | ==Characteristics== | ||
Diaphragm pumps: | Diaphragm pumps: | ||
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==Air compressors== | ==Air compressors== | ||
Small mechanically activated diaphragm pumps are also used as air compressors and as a source of low-grade vacuum. Compared to other compressors, these pumps are quiet, cheap and, most importantly, have no moving parts in the airstream. This allows them to be used without added lubrication in contact with the air, so the compressed air produced can be guaranteed clean. | Small mechanically activated diaphragm pumps are also used as air compressors and as a source of low-grade vacuum. Compared to other compressors, these pumps are quiet, cheap and, most importantly, have no moving parts in the airstream. This allows them to be used without added lubrication in contact with the air, so the compressed air produced can be guaranteed clean. | ||
==Sources== | ==Sources== | ||
[http://en.wikipedia.org/wiki/Diaphragm_pump Wikipedia Diaphragm Pumps] | [http://en.wikipedia.org/wiki/Diaphragm_pump Wikipedia Diaphragm Pumps] | ||