The industrial applications of pumps have greatly changed the way machines work. At the helm of this transformation is the high pressure positive displacement pump (abbreviated as the PD pumps). Ever since their discovery, they have constantly been applied in machinery both in the traditional and modern setting.
The two main classes of positive displacement pumps are the rotary and reciprocating pumps. Although the underlying principle of constant flow remains the same, their dissimilarity presents itself in their functionality. Rotary drives transmit highly viscous liquids efficiently but experience difficulty in moving abrasive fluids and gases. This is largely because they require constant lubrication. Reciprocating drives are however more versatile since pumping both abrasive and viscous liquids is possible.
Their ability to operate efficiently depends widely on viscosity and pressure, as seen above. These two properties usually affect rate of flow. This is actually the main reason why they are preferred to their centrifugal counterparts. The ability to maintain a constant rate of flow even with significant variations in viscosity and discharge pressure makes them more versatile.
Their applications are spread all over the facets of industrialization. One major use can be seen in the oil, gas and petroleum industry. Centrifugal pumps cannot move fluids that contain large amounts of gas. PD drives however have the capabilities of handling fluids with up to 50 percent gas without requiring any modification. Specialized PD drives can transmit fluids with up to 95 percent gas.
The properties above helped curb the cost of transmitting oil from offshore countries since oil and gas mixture could be pumped through one mechanism only.
PD pumps also found their application in the chemical industry. This typically involved the food and beverage industry and the pharmaceutical companies. Bio technology also uses these types of pumps. During a chemical process, when the chemical solution is passed through the reactor, certain attributes change due to heating and other reactions. This includes the viscosity of the mixture. The process however demands a constant rate of flow through the procedure. This is why they are applied in the chemical industry.
Paper mills usually dissolve the wood fibers and the resulting solution is used as a fuel for the boilers. This fuel needs to be pumped at a consistent rate. Viscosity of this solution keeps changing as it is burned while pressure also fluctuates wildly due to clogging in some passageways and erosion. A PD drive is therefore vital in ensuring that a constant rate of flow is maintained since irregular amounts of heat can distort the final quality of paper.
In conclusion, one should have a proper understanding concerning the physical properties of fluids to be moved and the expected changes in its properties during the process. This information would be vital on deciding which type of pumps to apply.
The two main classes of positive displacement pumps are the rotary and reciprocating pumps. Although the underlying principle of constant flow remains the same, their dissimilarity presents itself in their functionality. Rotary drives transmit highly viscous liquids efficiently but experience difficulty in moving abrasive fluids and gases. This is largely because they require constant lubrication. Reciprocating drives are however more versatile since pumping both abrasive and viscous liquids is possible.
Their ability to operate efficiently depends widely on viscosity and pressure, as seen above. These two properties usually affect rate of flow. This is actually the main reason why they are preferred to their centrifugal counterparts. The ability to maintain a constant rate of flow even with significant variations in viscosity and discharge pressure makes them more versatile.
Their applications are spread all over the facets of industrialization. One major use can be seen in the oil, gas and petroleum industry. Centrifugal pumps cannot move fluids that contain large amounts of gas. PD drives however have the capabilities of handling fluids with up to 50 percent gas without requiring any modification. Specialized PD drives can transmit fluids with up to 95 percent gas.
The properties above helped curb the cost of transmitting oil from offshore countries since oil and gas mixture could be pumped through one mechanism only.
PD pumps also found their application in the chemical industry. This typically involved the food and beverage industry and the pharmaceutical companies. Bio technology also uses these types of pumps. During a chemical process, when the chemical solution is passed through the reactor, certain attributes change due to heating and other reactions. This includes the viscosity of the mixture. The process however demands a constant rate of flow through the procedure. This is why they are applied in the chemical industry.
Paper mills usually dissolve the wood fibers and the resulting solution is used as a fuel for the boilers. This fuel needs to be pumped at a consistent rate. Viscosity of this solution keeps changing as it is burned while pressure also fluctuates wildly due to clogging in some passageways and erosion. A PD drive is therefore vital in ensuring that a constant rate of flow is maintained since irregular amounts of heat can distort the final quality of paper.
In conclusion, one should have a proper understanding concerning the physical properties of fluids to be moved and the expected changes in its properties during the process. This information would be vital on deciding which type of pumps to apply.
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