Imported self-operated flow regulating valve | Imported self-operated regulating valve | Imported flow regulating valve

尺寸范围：

DN15～DN300

压力等级：

1.6～16MPa

介质温度：

-29℃-380℃

Imported self-operated flow control valve
Overview The self-operated flow control valve is a type of control valve that does not require an electric or pneumatic actuator. Compared with manual control valves, its advantage is that it can automatically adjust. Compared with electric control valves, its The advantage is that it does not require external power. Application practice has proved that in closed water circulation systems such as hot water heating systems and air conditioning and refrigeration systems, the correct use of this valve can easily realize the flow distribution of the system and achieve the dynamic balance of the system. Simplifying the debugging of the system can stabilize the working status of the pump, etc. Self-operated regulating valves have broad application prospects and markets in heating and air conditioning projects.
Characteristics of imported self-operated flow control valve
Overcomes uneven heating and cooling in the system and improves heating and cooling quality
The flow rate can be set according to the design or actual requirements, and the pressure difference in the system can be automatically eliminated Fluctuate and keep the flow rate unchanged
Completely solve the contradiction between large near-end pressure difference and small far-end pressure difference
Eliminate the flow redistribution work when switching heat sources in multi-heat source pipe networks
Reduce the difficulty of network adjustment , simplifying the complex network adjustment work into simple flow distribution
Reduce the amount of circulating water in the system and reduce the system resistance
Reduce the design workload and do not need to perform cumbersome hydraulic balance calculations on the pipe network
Installation and debugging of self-operated flow control valve
The self-operated flow control valve can be installed on the water supply pipe or the return pipe. If the system pressure is too high, to protect the safety of terminal equipment.
The self-operated flow control valve can be installed horizontally or vertically.
Self-operated flow control valves have a dial that sets the flow rate. Before the valve leaves the factory, the flow rate can be set in advance according to the designed flow value. The flow rate can also be set on site after installation on the system. When setting the flow rate, just adjust the dial number to the design flow value.
The self-operated flow control valve does not have a cut-off function. If necessary, a separate stop valve or other cut-off valve should be installed.
The installation location requires a straight pipe section according to the equipment requirements, usually twice the pipe diameter.
The flow direction of the medium should be consistent with the flow arrow of the valve body
After installation, set the flow rate according to the needs of its series pipeline
Check whether the pressure difference at both ends of the valve is within the working pressure difference range
> Try to avoid the valve operating under minimum flow conditions
There is no drain screw on the spring cover, and the drain should be drained regularly.
The working principle of the imported self-operated flow regulating valve: After the controlled medium of the self-operated flow regulating valve is input into the valve, the pressure in front of the valve is input into the lower membrane chamber through the control pipeline, and the pressure after throttling by the throttle valve is input into the upper membrane chamber, and The difference △ is called the effective pressure. The balance between the thrust force acting on the diaphragm and the thrust difference acting on the diaphragm and the reaction force of the spring determines the relative position of the valve core and the valve seat, thereby determining the flow rate through the valve. When the flow rate through the valve increases, that is, △ increases, the result is that it acts on the lower and upper diaphragm chambers respectively, causing the valve core to move toward the valve seat, thereby changing the flow area between the valve core and the valve seat, causing an increase. The thrust acting on the diaphragm plus the reaction force of the spring and the thrust acting on the diaphragm create a balance at the new position to achieve the purpose of controlling the flow. Vice versa, the same principle applies.
Technical Specifications Basic Design B Test B
Size Range~
Pressure Level~
Medium Temperature
Shell Material Carbon Steel Stainless Steel