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Characteristics of flow control of water pump control valve
abstract：The water pump control valve is a multifunctional valve that uses a pilot mode to control flow. Suitable for pipelines where flow and pressure control is required for water distribution pipes
The water pump control valve is a multifunctional valve that uses a pilot mode to control flow. Suitable for pipelines where flow and pressure control is required for water distribution pipes, keeping the predetermined flow constant, limiting excessive flow to a predetermined value, and appropriately reducing upstream high pressure. Even if the pressure upstream of the main valve changes, it will not affect the flow downstream of the main valve.
1. Change the conventional water pump control valve from using orifice plates or purely mechanical principles to reduce the drainage area, and use relevant guide valves to greatly reduce energy loss during the throttling process;
2. High control sensitivity, safety and reliability, easy debugging, and long service life.
The water pump control valve can automatically achieve flow balance of the system without external power supply. It is achieved by maintaining a constant pressure difference before and after the orifice plate (fixed aperture) to limit the flow rate, therefore, it can also be called a constant flow valve.
The function of the water pump control valve is to control the flow rate, which can lock the amount of water flowing through the valve, rather than balancing resistance. He can solve the problem of dynamic imbalance in the system: in order to maintain the high-energy operation of a single refrigeration unit, boiler, cooling tower, heat exchanger and other equipment, it is necessary to control the flow rate of these equipment to be fixed at the rated value; From the end of the system, in order to avoid the mutual influence of dynamic regulation, it is also necessary to limit the flow at the end devices or branches.
The disadvantage of water pump control valves in design is that they have a small working pressure difference requirement. Generally, products require a small working pressure difference of 20KPa. If installed in a more unfavorable circuit, it is necessary to increase the working head of the circulating water pump by an additional 2 meters. Therefore, a method of near end installation and far end safety should be adopted. Do not install this flow control valve when the distance between the user and the heat source is greater than 80% of the heating radius.
1. Change the conventional water pump control valve from using orifice plates or purely mechanical principles to reduce the drainage area, and use relevant guide valves to greatly reduce energy loss during the throttling process;
2. High control sensitivity, safety and reliability, easy debugging, and long service life.
The water pump control valve can automatically achieve flow balance of the system without external power supply. It is achieved by maintaining a constant pressure difference before and after the orifice plate (fixed aperture) to limit the flow rate, therefore, it can also be called a constant flow valve.
The function of the water pump control valve is to control the flow rate, which can lock the amount of water flowing through the valve, rather than balancing resistance. He can solve the problem of dynamic imbalance in the system: in order to maintain the high-energy operation of a single refrigeration unit, boiler, cooling tower, heat exchanger and other equipment, it is necessary to control the flow rate of these equipment to be fixed at the rated value; From the end of the system, in order to avoid the mutual influence of dynamic regulation, it is also necessary to limit the flow at the end devices or branches.
The disadvantage of water pump control valves in design is that they have a small working pressure difference requirement. Generally, products require a small working pressure difference of 20KPa. If installed in a more unfavorable circuit, it is necessary to increase the working head of the circulating water pump by an additional 2 meters. Therefore, a method of near end installation and far end safety should be adopted. Do not install this flow control valve when the distance between the user and the heat source is greater than 80% of the heating radius.