Three-way diverting valve DN20 bronze 4160-03.000

DN20 Bronze 3-way diverting valve

The DN20 3-way diverting valve is a key component of control systems in heating and cooling installations. Its versatility allows for two primary functions: diverting the medium flow between different heat loads and mixing for precise control of the supply temperature.

Construction and materials ensuring long-term operation

The valve body is made of corrosion-resistant bronze, guaranteeing reliability in the humid environments typical of heating installations. The stainless steel stem is equipped with a double O-ring sealing system, where the outer ring can be replaced without the need to drain the entire installation - significantly facilitating maintenance work.

All components in contact with the medium are made of materials resistant to standard heating fluids:

• O-rings and valve plug made of EPDM rubber,
• Return spring made of stainless steel,
• Valve insert made of brass.

Operating parameters and system compatibility

The device operates in a temperature range of 2-120°C (up to 100°C when fitted with an actuator or protective cap) at a maximum working pressure of PN10. A Kvs value of 3.48 ensures optimal flow characteristics for the DN20 nominal diameter.

The allowable differential pressure drop is 0.75 bar, enabling trouble-free operation in most typical heating installations. G1" threaded connections allow for installation using threaded or brazed nipples - providing installation flexibility that is particularly important during the modernization of existing systems.

The valve is compatible with the entire range of IMI HEIMEIER controllers:

• M30x1.5 thermostatic heads for proportional control,
• EMO T actuators for two-point control,
• TA-Slider 160 and EMO 3/230 actuators for three-point applications.

Diverting and mixing functions in practice

In the diverting function, the valve performs excellently when switching between heat sources - e.g., gas boiler ↔ solid fuel boiler or heat pump ↔ solar collector. It equally effectively diverts the flow between different consumers, such as central heating circuit ↔ domestic hot water heater.

The mixing function is used for:

• Regulating supply air temperature downstream of heaters,
• Maintaining a constant supply temperature for heat exchangers,
• Controlling the capacity of fan units (fan coils, fan heaters),
• Stabilizing the operating parameters of domestic hot water heaters.

Overall dimensions (71×35.5×31mm) and a mass of approximately 0.56 kg.