Pump will create differential pressure when it starts to operate and drive the fluid to the discharge, but the velocity of the fluid is still controlled by valve. Is this correct?
if the valve is flow regulator, that define the amount of flow throught the pipe, then you can controled the flow velocity whit the valve.
Do you mean a different pressure control by valve with a constant flow rate?!
Kian,
If you mean the control valve, a flow control valve regulates the flow or pressure of a fluid. Control valves normally respond to signals generated by independent devices such as flow meters or temperature gauges.
Canyou put a schematic of your loop.
you can control your flow rate using a valve at the discharge of your pump. before you run your experiment, it is better to calibrate your system. you can use a cylinder and stop watch to do that..
Your can control the flow rate with valve but we prefer to use an inverter even though its more expensive.
sometime you can use the pump to control velocity of fluid by choosing variable speed pump and you can use by-pass valve in your loop. also, valve to control velocity will be good if you choose proper valve in such purpose.
After passing through the vena contracta, the flow area gets larger, the fluid velocityreduces and some of the fluid pressure recovers. In a conventional valve, the highvelocity fluid passing through the throttling point is controlled by the pressure drop across the valve.
well valve control volume flowrate directly , well changes in volume flow will alter velocity of fluid in a conduit.
Yes. At given pressure at the inlet the pressure and the velocity controlled by the regulator valve.
One can control over differential pressure measurement, a algorithm software controlled actuator on a control valve. But the pricise way is to give the flow control valve guidance with a calibrated flow meter. It just depends on the needed accuracy.
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