What adjustment
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What kind of regulation is this pressure control at the pump outlet?
It’s just ordinary pressure regulation – the pressure in the main circuit is used to control the opening degree of the return valve, thereby regulating the pressure in the main circuit
The main circuit pressure is controlled via a bypass.
This should be a pressure safety valve, not a control valve, used for overpressure relief and protection of the pump
Yes, pressure is taken from the main circuit to send a signal to the bypass, thereby regulating the pressure in the main circuit
Single-loop control (regulation) system for pump outlet pressure, enabling the indication, control, and upper/lower limit alarm of the pressure in the branch line on the right side of the pump outlet. The controlled variable is the pressure in the right branch at the pump outlet, while the control variable is the flow rate in the left branch.