Thermostatic balancing valve｜Product Features
This product can be adapted to various electric valves and ball valves. During installation, please be sure to ensure that the flow direction of the valve is consistent with the arrow direction of the dynamic flow balancing valve. The installation is easy by directly tightening the threaded connection between the product and the valve.
| Order code | Product model | Nominal diameter | Connection thread GA | Connection thread GB | ∅A | Nominal pressure |
Flow rate m³/h (under 0.1-0.35MPa pressure) |
| 14074 | PHF-DL-20L | DN20 | G3/4 | G3/4 | 31 | PN16 | 1.1 |
| 14075 | PHF-DL-25L | DN25 | G1 | G1 | 42.5 | PN16 | 1.1 |
Structural principle
The application of thermostatic balancing valve is mainly in the initial adjustment of the system, such as the initial distribution of central air conditioning and water supply and heating. It consists of a valve shell and a valve core. The valve core is a hydraulic automatic adjustment orifice plate. The hydraulic automatic adjustment orifice plate consists of a valve core with an automatically adjustable flow area and a high-precision spring. The spring can automatically control the size of the flow area on the valve core according to the difference in pressure at both ends, so that the flow at the outlet end remains constant.
The front and rear pressure difference of the balancing valve is less than the minimum starting pressure difference：
In this case, the spring will not be compressed (there is a preload when the valve core is assembled), the valve core is in a static state, and the flow area is the largest. At this time, the water flow through the balancing valve increases with the increase of the pressure difference.
The front and rear pressure difference of the balancing valve is within the calibrated working range：
At this time, the top of the valve core begins to compress the spring under the action of the fluid pressure, and the balancing valve enters the working state. Within this working pressure range, if the fluid pressure changes, the excess channel of the curve on the valve core will also change accordingly. Therefore, within this pressure range, no matter how the pressure changes, the flow of water at the output end will remain unchanged.
When the pressure difference between the front and rear of the balancing valve is above the working range:
In this state, the spring inside the balancing valve core will be completely compressed, and the water can only flow through the circular holes on both sides of the valve core. The flow area will remain unchanged, and the flow rate is proportional to the pressure difference and increases with the increase of the pressure difference.
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