Pump outlet line resistance

To adjust the opening percentage of the control valve manually or automatically; this will change the pumping pressure in the piping, ensuring that the flow rate remains at a steady level.

The control valve will be adjusted manually or automatically to change the friction loss in the exhausting line in order to reach and keep at the desired flow rate.

Manually or automatically adjust the opening degree of the control valve to change the resistance in the pump’s output pipeline, thereby keeping the flow rate at the desired level. The control valve will be adjusted manually or automatically to change the exhausting resistance of the pump in order to maintain the desired flow rate.

Manually or automatically adjust the opening degree of the control valve to change the resistance in the pump’s output pipeline, thereby keeping the flow rate at the desired level. Adjust the valve opening manually or automatically to change the resistance force in the pump discharge pipeline, and keep the flow rate stable as desired.

If it works, then there’s no need for commas. Here, the resistance is hydraulic resistance, local head loss. Using \"resistance\" will work; more precisely, it should be \"hydraulic resistance\".

I asked the technicians, and they said it’s just resistance! ! There’s no emphasis on hydraulic resistance! !

I’m not quite satisfied yet! ! I’m still looking into it, and I hope other sea friends can help by continuing to @ it! ! !

I asked the technicians, and they said it’s just resistance! ! There’s no emphasis on hydraulic resistance! ! If the flow rate is adjusted by changing the valve opening, then the resistance here is the hydraulic resistance. The operating point of the pump (flow rate and head) is determined by the intersection of the pump’s performance curve and the characteristic curve of the pipeline downstream of the pump (H=H(static) + SQ^2). The flow rate can be adjusted by changing these two curves. Changing the operating curve of the pump can be achieved by adjusting its structure (such as by reducing the outer diameter of the impeller) and its speed (using a frequency converter). Changing the characteristic curve of the pipeline means changing S, which can be done by adjusting the valve opening degree (increasing or decreasing the local head loss, thereby increasing S).

Manually or automatically adjust the opening degree of the control valve to change the resistance in the pump’s output pipeline, thereby keeping the flow rate at the desired level. It seems quite complex. Actually, I think the middle sentence can be omitted to make it simpler. If it is an operation manual, it should be concise and easy to understand. Manually or automatically adjust the control valve to maintain a constant flow at the set point.