Giacomini innovates with its RK HDB kits: a new range of dynamically balanced radiator valves

In January 2025, the company is upgrading its HDB thermostatic radiator valve series to a ready-to-install kit solution. Suitable for both new builds and renovations, these kits come in the form of a ½” thermostatic radiator valve with M30 x 1,5 mm thread for fixing the thermostatic head, an integrated dynamic balancing mechanism, a 360° swivel chrome elbow, and squeeze or slip-on fittings to suit all situations.

This new range of valves has been designed to control the distribution of water flow in radiators at all times, while simplifying installation work. Thanks to their advanced technologies, they automatically adjust the amount of energy supplied to radiators to ensure optimal performance, reduce energy consumption, and extend the lifespan of systems.

Complete pre-assembled kits, ready to install and adapted to each situation

The new RK pre-assembled kits from GIACOMINI have been designed to simplify the connection of radiators.

They include a ½” thermostatic valve with an M30 x 1,5 mm thread for fixing the VT 0.2 thermostatic head, a ½” isolation device, both in chrome-plated nickel-plated brass with 360° swivel elbows already fitted.

Ready to install, the kits are sold with crush or slip fittings for connecting PER tubes. They are available in angle or inverted angle versions for tube diameters 12 x 1,1 and 16 x 1,5.

Constant water flow maintenance for optimal thermal comfort

The thermostatic valves in RK HDB kits have an integrated mechanism that regulates and limits the flow rate to predefined values.

The preset flow rate on the valve will never be exceeded, even if load changes occur in the system due to the closing of other valves or during initial start-up.

This mechanism is a balancing membrane with controlled deformation which expands or compresses under the effect of water pressure to stabilize the flow in each radiator independently of pressure variations in the network (closing of other taps or commissioning of the installation).

In case of excessive pressure, the membrane compresses to reduce the passage of water in the radiator and limit the flow rate. Conversely, when the pressure is insufficient in the network, the membrane relaxes, allowing the circulation of water to be amplified to compensate for the flow rate.

They thus guarantee automatic flow balancing to a preset value when installed using an R73P adjustment key (included in the kit).

Within a minimum and maximum differential pressure range, this operation is completely independent of the differential pressure.

Since the required flow rate can be preset directly on the mechanism from 6 adjustment positions using an R73K adjustment key, commissioning time is significantly reduced.

In renovation installations where many network parameters are often unknown to the installer, making it very difficult to calculate pressure losses to enable balancing of radiators, the RK HDB kit is the ideal solution.

HDB thermostatic valves are designed to operate under differential pressure ranges of 20 to 60 kPa, allowing them to be used in a wide range of situations while avoiding the need to install a differential pressure regulator on the distribution network.

They withstand temperatures from 5 to 95°C and a maximum operating pressure of 16 bars in the manual version and 10 bars with a thermostatic head.

HDB thermostatic taps equipped with a GIACOMINI thermostatic head contribute to the thermal comfort of the home and prevent hydraulic imbalances in the networks, thus reducing energy bills.