control differential means

  • Differential Pressure Control Valves (DPCV) - Honeywell UK ...

    The V5001P Kombi-Auto 'screwed' differential pressure control valve is used to automatically maintain a hydronic balance in residential or commercial heating and cooling systems, installed in the return pipeline. Used in systems with variable volume flows maintaining differential pressure at a constant set...

  • PID controller - Wikipedia

    The distinguishing feature of the PID controller is the ability to use the three control terms of proportional, integral and derivative influence on the controller output to apply accurate and optimal control. The block diagram on the right shows the principles of how these terms are generated and applied.