Balance valve classification

The balance valve is to change the flow resistance through the valve to achieve the purpose of adjusting the flow by changing the gap (opening) between the valve plug and the valve seat. The object of the balancing valve is the resistance of the system and the ratio of new water can be calculated according to the design. Balanced distribution, each branch at the same time increase or decrease in proportion, still meet the current climate needs part of the load flow requirements, play a role in thermal balance.

Dynamic balancing valve is divided into dynamic flow balancing valve, dynamic pressure balance valve, self-operated pressure difference control valve and so on. Dynamic flow balance valve also known as: self-operated flow control valve, self-balancing valve, constant flow valve, automatic balancing valve, etc. It is based on the system operating conditions (pressure difference) and automatically changes the drag coefficient, at a certain pressure difference Within the range, it can effectively control the passing flow to maintain a constant value, that is, when the pressure difference between the front and rear of the valve increases, the flow can not be increased by the automatic shut-off action of the valve. Conversely, when the pressure difference decreases, the valve Automatically open, flow is still kept constant, but when the pressure difference is less than or greater than the normal working range of the valve, it can not provide an additional pressure head, then the valve is still fully open or closed position than the flow is still set Low or high flow rate cannot be controlled.

Dynamic pressure differential valve, also known as self-operated differential pressure control valve, differential pressure controller, regulator variable synchronizer, differential pressure valve, etc., it is used to adjust the valve opening pressure, using the pressure of the valve core The change is reduced to make up for the change in the resistance of the pipeline, so that the pressure difference can be maintained basically unchanged when the operating conditions change. Its principle is that within a certain flow range, the pressure differential of the controlled system can be effectively controlled, ie when When the pressure difference of the system increases, it can ensure that the pressure difference of the controlled system increases when the valve automatically shuts down. When the pressure difference decreases, the valve opens automatically and the pressure difference remains constant. Self-operated differential pressure control valve. In the control range, the automatic valve plug is closed. The pressure difference between the two ends of the valve exceeds the preset value. The valve plug automatically opens and automatically adjusts the opening degree under the pressure-sensitive membrane to maintain the pressure across the valve. The difference is relatively constant.