FIRŠT ROTOMIX F4 four-way mixing valve DN 20 – G 3/4″

The FIRŠT ROTOMIX F4 is a four-way brass mixing valve in DN 20 size with G 3/4-inch connections. It is designed for mixing and directing heating water in radiator and underfloor heating systems.

Its four-way design connects the flow and return lines and allows the temperature of the water circulating through the heating system to be regulated. The position of the internal mixing element is adjusted using the handle on the top of the valve.

The compact body is manufactured from forged brass. Its specially designed sealing system and low operating torque provide reliable long-term operation and reduce the possibility of the valve becoming seized or blocked.

The valve can be operated manually or fitted with a compatible FIRŠT motorised actuator. A suitable actuator can be installed quickly without opening the actuator housing.

The DN 20 version has a Kvs flow coefficient of 6 and is suitable for heating systems where the required flow rate and connection size correspond to the valve specifications.

Important: The image is for illustration purposes only and may differ from the actual product, particularly in the shape of the handle, lettering, colour markings and other details. Before ordering, check the F4 version, DN 20 size and G 3/4-inch connection.

Technical specifications

Manufacturer: FIRŠT ROTOTEHNIKA
Series: ROTOMIX
Version: F4
Product type: four-way mixing valve
Nominal size: DN 20
Connection size: G 3/4″
Flow coefficient: Kvs 6 m³/h
Nominal pressure: PN 6
Maximum working pressure: 6 bar
Maximum medium temperature: 110 °C
Rotation angle: 90°
Body material: forged CuZn39Pb3 brass
Rotor and spindle material: CuZn39Pb3 brass
Spindle sealing: EPDM O-rings
Weight: approximately 0.58 kg
Manufacturer code: 41009
Operation: manual or with a compatible FIRŠT motorised actuator
Application: radiator and underfloor heating systems
Sales unit: one piece