A pump is a device that moves fluids by means of mechanical action. High pressure process pumps move the fluid by trapping a given fixed amount and displacing the trapped amount through the discharging pipe. They are more preferred to their counterparts the centrifugal types since their capacity is not affected by the pressure under which they operate. They are also known as constant volume pumps and are divided into three main categories namely the rotary, reciprocating and linear drives. These classifications are usually made according to the mechanism used to transmit the fluid.
Rotary drives are used in situations where the liquid that is being moved is thick or in scientific terms possesses a high level of viscosity. They cannot therefore be operated dry for extended durations. This would imply that abrasive fluids such as water will not be transmitted with the required efficiency. The only exception is air and vapor but this also has to be done under strict time constraints. Circulation of lubricant oils through turbines and engines is a common application of the rotary pumps.
Reciprocating drives on the other hand are considered more versatile due to their ability to move both viscous and abrasive fluids. Operation is by means of the back and forth action of a plunger usually within a fixed volume. They are generally slower than the other types but they however provide higher efficiency levels. Usage is highly based on situations that require high levels of strain but low volumes of the fluid.
Linear drives are simplistic in design but still retain their ability to perform the task required of it. One would only need a rope, a wheel and a piece of PVC piping to construct one. Since these materials are readily available, its use has spread all around the world. It serves as a pump for water from wells and boreholes.
In order for one to experience the full capabilities and performance of positive displacement drives, the installation has to be done properly and in accordance to the stipulated guidelines. Each manufacturer usually provides instructions for proper installation which if followed to the latter will definitely result in a successful installation.
A most basic approach would be to ensure that a solid foundation on which the pump would rest on is built. The best foundation is usually reinforced concrete. The weight will determine the strength of the foundation. The pump and the driver are bolted to the concrete slab via a secured steel base plate. This and a proper application of the user manual is all that is needed for installation.
Factors that determine the choice of the pump can be divided into two; the viscosity of the fluid and the pressure needed. Changes in viscosity can have huge implications on the flow rate and efficiency. These might be slight, huge or even moderate changes.
Changes in pressure are also a major concern and its effects on the rate of flow and efficiency cannot be understated. A pump that maintains its flow rate and efficiency even with significant changes in pressure would therefore be the ideal choice. Pressure pumps give the best value for money due to their ability to well address the viscosity and pressure concerns.
Rotary drives are used in situations where the liquid that is being moved is thick or in scientific terms possesses a high level of viscosity. They cannot therefore be operated dry for extended durations. This would imply that abrasive fluids such as water will not be transmitted with the required efficiency. The only exception is air and vapor but this also has to be done under strict time constraints. Circulation of lubricant oils through turbines and engines is a common application of the rotary pumps.
Reciprocating drives on the other hand are considered more versatile due to their ability to move both viscous and abrasive fluids. Operation is by means of the back and forth action of a plunger usually within a fixed volume. They are generally slower than the other types but they however provide higher efficiency levels. Usage is highly based on situations that require high levels of strain but low volumes of the fluid.
Linear drives are simplistic in design but still retain their ability to perform the task required of it. One would only need a rope, a wheel and a piece of PVC piping to construct one. Since these materials are readily available, its use has spread all around the world. It serves as a pump for water from wells and boreholes.
In order for one to experience the full capabilities and performance of positive displacement drives, the installation has to be done properly and in accordance to the stipulated guidelines. Each manufacturer usually provides instructions for proper installation which if followed to the latter will definitely result in a successful installation.
A most basic approach would be to ensure that a solid foundation on which the pump would rest on is built. The best foundation is usually reinforced concrete. The weight will determine the strength of the foundation. The pump and the driver are bolted to the concrete slab via a secured steel base plate. This and a proper application of the user manual is all that is needed for installation.
Factors that determine the choice of the pump can be divided into two; the viscosity of the fluid and the pressure needed. Changes in viscosity can have huge implications on the flow rate and efficiency. These might be slight, huge or even moderate changes.
Changes in pressure are also a major concern and its effects on the rate of flow and efficiency cannot be understated. A pump that maintains its flow rate and efficiency even with significant changes in pressure would therefore be the ideal choice. Pressure pumps give the best value for money due to their ability to well address the viscosity and pressure concerns.
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