The RLV-KDV H-block is a dynamic twin radiator connection fitting with an integrated differential pressure controller, designed for radiators with an integrated valve in two-pipe heating systems. The DN15 angled left-hand version (013G7872) is equipped with self-sealing connection pieces and allows connection of a radiator with G½ female thread to G¾ A system pipework.

The valve contains an integrated differential pressure controller which ensures a constant differential pressure directly across the radiator valve. Flow presetting is carried out on the integrated radiator valve on the basis of this constant pressure. As a result, all radiators in the system operate at a defined pressure and a constant differential pressure is ensured under both full and partial load.

The heating system is automatically hydraulically balanced, the return pipe temperature is reduced, energy is saved, and radiator noise is prevented.