Which type of Positive Displacement pump is commonly used?

The reciprocating (piston) pump is a commonly used type of positive displacement pump due to its ability to handle a wide range of flow rates and pressures while providing a constant flow. This type of pump operates by using pistons driven by a crankshaft to create a vacuum that draws liquid into a cylinder and then forces it out.

One significant advantage of reciprocating pumps is their efficiency and reliability in delivering precise volumes of liquid, which is particularly valuable in various water treatment and distribution applications. This capability allows them to maintain consistent pressure even when the discharge is varied, making them suitable for processes that require a stable flow rate.

In terms of maintenance, these pumps can be easily serviced, as many components are accessible and replaceable. The robustness of the design supports their use in various environments, including those where solid particles may be present in the fluid, depending on the pump configuration.

Centrifugal pumps, by contrast, function based on rotational energy and are typically used for large flow rates but are not considered positive displacement devices. Jet pumps utilize a different principle involving a jet of fluid to create a vacuum, while vertical turbine pumps are designed mainly for deep well applications and do not generally fall into the positive displacement category.

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