Design for pump drives
Design available acc. to API 610
Spacers adjusted to standard pump dismounting dimensions (DBSE)
Radial assembly, no displacement of the machines required
The RADEX®-N is a backlash-free, torsionally-stiff and maintenance-free all-steel coupling. The lamina that are extremely rigid in sense of rotation are made from high-strength, stainless spring steel and enable a compensation for high displacements with low restoring forces. By reason of the all-steel design the RADEX®-N can be used in drives with temperatures of up to 280° C.
The steel laminae packings from stainless spring steel were developed on the basis of FEM calculations. Under consideration of the necessary possibilities of displacements of the coupling the optimal form regarding torque transmission and torsional rigidity was aimed for. The fitted form of the steel laminae at the outside diameter is the result of this optimization calculation.
The „heart“ of the steel laminae coupling are the laminae packings and their connection to the hubs or spacers.
High-strength, special dowel screws that are alternately screwed with hubs and spacer enable a combination of frictional engagement and positive locking. Thus a high power density with simultaneous easy displacement and low restoring forces is guaranteed.
Due to the special constructive design of the RADEX®-N components the laminae packings are „artificially“ prestressed. Hereby the torsional rigidity of approx. 30 % is enabled and at the same time the known problem regarding the axial vibrations of the spacer is avoided.
This type are certified and confirmed according to directive 2014/34/EU as units of category 2G/2D and thus suitable for the use in hazardous areas of zone G1, G2, D21 and D22.
RADEX®-N NANA 3 was developed specifically for the pump industry and corresponds to the specifications of the API 610 standard.
It is used on process pumps in the chemical and petrochemical industry. Subject to its excellent properties of misalignment the coupling is extremely suitable for the use on hot media pumps, too. Other applications are water pumps, sewage pumps and discharge pumps in marine technology.