Function and Application
Dynamic balancing two-way valves are used in fan coil unit chilled/hot water pipelines or heating system pipelines to control indoor temperature by opening or closing the pipeline. During system operation, they prevent dynamic hydraulic interference, maintain constant flow in the pipeline network, and enable more precise temperature control.
Working Principle
In cooling and heating systems, fan coil units are typically controlled by electric two-way valves. When some fan coil units shut down, the flow in other operating units increases, causing room temperature fluctuations. DBEDRV is an integrated product combining a dynamic flow balancing valve and an electric two-way valve, controlled by an electric thermostat DBEDRV. When the valve opens, the constant flow function of the dynamic balancing valve maintains a consistent flow through the equipment, unaffected by system pressure fluctuations, ensuring higher control accuracy. In cooling or heating systems, when the room temperature reaches the set value on the room thermostat, the thermostat sends a signal to the electric actuator to close the valve. When the room temperature is above or below the set temperature, the room thermostat sends a signal to the electric actuator to open the valve. Through valve closing and opening, the room temperature is maintained within the range set by the room thermostat. The built-in valve core automatically maintains constant flow.
Dimensions
Bore L(mm) L1(mm) H(mm) W(mm)
DN15 98 143 118 31.0
DN20 100 145 120 32.0
DN25 102 148 122 36.0
Product Features
1. On/off control via control system signals;
2. Dynamic flow balancing to eliminate mutual interference between terminal devices;
3. Higher system control accuracy, providing greater comfort compared to traditional variable flow systems;
4. Factory preset flow;
5. No on-site debugging required, resulting in higher system operational efficiency.
Technical Parameters
Nominal Diameter DN15-DN25
Pressure Rating PN20
Operating Temperature 0-110°C
Working Medium Air conditioning chilled/hot water, ethylene/propylene glycol solution
Connection Standard Threaded connection
Control Error ±10%
Operating Pressure Differential 20-200KPa/30-300KPa
Actuator Protection Rating IP44
Operating Voltage 220VAC 50Hz
Start-up Time 3min
Control Characteristics On/Off Control
Shut-off Pressure Differential 200KPa
Component Materials
1 Valve Body Brass
2 Valve Cartridge Brass
3 Blocking Plate EPDM
4 Valve Stem Stainless Steel 304
5 Spring Stainless Steel 304
6 Return Spring Stainless Steel 304
7 Sealing Material Nitrile Rubber
8 Actuator Housing Material: Flame-retardant PC
Actuator Internals: Reinforced POM
Product Models
Model Bore Operating Pressure Differential (KPa) Rated Flow
A B C D E F G J K M N P
DBEDRV DN15 20-200 0.36 0.47 0.6 0.8 1 1.15 125 1.51 - - - -
DBEDRV 30-300 - 0.47 0.6 0.8 1 1.15 125 1.51 1.6 1.8 2 -
DBEDRV DN20 20-200 0.36 0.47 0.6 0.8 1 1.15 125 1.51 - - -
DBEDRV 30-300 - 0.47 0.6 0.8 1 1.15 125 1.51 1.6 1.8 2
DBEDRV DN25 20-200 - - 0.6 0.8 1 1.15 125 1.51 - - - -
DBEDRV 30-300 - - 0.6 0.8 1 1.15 125 1.51 1.6 1.8 2 2.09