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It depends on the pump

It depends on the pump

Ultimately, the efficiency of Speed ​​Drive pumps depends on the user who selects the optimum speed for the respective application. (Photo: Whitman)

From a number of control parameters of the FU pump, the user selects the parameter according to which the process is continuously controlled to the selected control variable. Speed, pump pressure, flow rate and differential temperature can be selected. Each variable carries a specific control Contributes to process optimization and energy consumption optimization.

By setting a constant speed, which ranges between 1200 and 4000 rpm depending on the application, the power consumption of the product is greatly reduced.

When specified tolerance limits are exceeded, pump pressure regulation provides information about potential pump wear and the need for maintenance. With this type of control, the speed can be increased up to 4000 rpm.

Flow is measured with a vortex flowmeter with an accuracy of ±1.5% of the maximum value in l/min. The specified flow is monitored within the tolerance range. If there is a corresponding deviation, the pump speed is adjusted via the frequency converter.

The differential temperature Δt is the controlled variable that provides information about the homogeneity of the temperature distribution within the cavities. It is defined as the temperature difference between the tool inlet temperature and the tool outlet temperature. Once Δt is specified, the parameter can be specified as a controlled variable and monitored within the limits of tolerances.

Regardless of the selected control parameter, the advantage of the pump is that the freely adjustable speed makes it possible to set the pump’s working point on the current process.

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source: Whitman