In heating and cooling systems with varying flow rates, pressure differential regulators on branches (risers, horizontal branches) allow to eliminate the influence of hydraulic regime fluctuations on the branch. They prevent noise generation on regulating valves at high throttling head. They allow to optimize regulation by increasing the 'authority' of regulating valves.
Pressure differential regulators installed in front of regulating valves allow to eliminate noise generation caused by high throttling head and optimize regulation by increasing the 'authority' of the regulating valve. When impulse tubes are connected before and after the regulating valve, the pressure differential regulator allows to set the calculated flow rate and does not allow its excess.
On the bypass line of the circulation pump in systems with highly variable flow rates. When the flow rate decreases in the system, and consequently through the pump, the head created by the pump increases, and therefore the pressure differential between the suction and discharge nozzles increases. The regulator reacts to the increase in pressure differential and opens, allowing the heat transfer agent to flow from the discharge nozzle to the suction nozzle, thereby maintaining a constant flow rate through the pump.
In the jumper between the supply and return pipelines in the non-condensing boiler system connected to a system with a dynamic hydraulic regime, a pressure differential regulator is necessary to create an optimal boiler operating mode. As the flow rate decreases, the head created by the pump in the system increases, and consequently, the pressure differential between the supply and return pipelines of the boiler room increases. The regulator reacts to the increase in pressure differential and opens, allowing the hot heat transfer agent from the supply pipeline to flow to the return pipeline, providing a stable flow rate through the boiler regardless of fluctuations in the system. This scheme of using a pressure differential regulator increases the water temperature at the inlet to the boiler, reducing the likelihood of condensation of exhaust gases on the heat exchange surface.
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