1. Product Features
Flow control valve, also known as 400X flow control valve, is a multifunctional valve that uses high-precision pilot mode to control flow.
1). A change to the principle of reducing the area of the watershed by using an orifice plate or a purely mechanical throttle in the conventional throttle valve, and using the relevant pilot valve to minimize the energy loss during the throttle process
2). High control sensitivity, safety and reliability, easy debugging and long service life.
The flow control valve can automatically realize the flow balance of the system without an external power supply. The flow is limited by keeping the pressure difference between the front and rear of the orifice (fixed diameter) constant, so it can also be called a constant flow valve.
The object of constant flow valve is flow, which can lock the amount of water flowing through the valve, not the balance of resistance. He can solve the problem of dynamic imbalance of the system: in order to maintain the high-efficiency operation of a single refrigerator, boiler, cooling tower, and heat exchanger, it is necessary to control the flow 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 adjustment also needs to limit the flow at the end device or branch.
The problem that should be paid attention to in the design, the disadvantage of the flow control valve is that the valve has a minimum working difference requirement. General products require a minimum working pressure difference of 20KPa. If installed on the most unfavorable circuit, it will inevitably require the circulating water pump to increase by 2 meters of water column. The working head should be installed near the end and the far end is uneasy. Do not install this flow control valve when the user is away from the heat source more than 80% of the heating radius.
2. Working principle:
The structure of digital display flow control valve is composed of automatic valve core, manual valve core and display part. The display part is composed of the flow valve movement, sensor transmitter, and electronic calculator display part.
Its work is extremely complicated. The measured water flows through the valve, and the water flow impacts the impeller in the flow movement. The rotation of the impeller is sensed by the sensor transmitter, so that the sensor sends out an electric signal proportional to the flow rate. The flow rate signal is sent to the electronic calculator through the wire and passes through the calculator. After calculation and microprocessor processing, the flow value is displayed.
The manual spool is used to adjust the flow rate, and the required flow rate is set according to the displayed value. The automatic valve core is used to maintain a constant flow rate, that is, when the pressure of the pipe network changes, the automatic valve core will automatically open the large fire and close the small valve port under the action of the pressure to maintain the set flow rate value unchanged.