WVA number
WVA numbers are a reference and assignment system for brake linings, clutch facings, brake shoes and other friction materials which will especially be used in road vehicles but also in mechanical engineering. The WVA numbering system has been developed by the "VRI-Verband der Reibbelagindustrie", Cologne / Germany. The VRI is the German Federation of Friction Industry and a member of FEMFM - Federation of European Manufacturers of Friction Materials.
Taking the dimensionally determined parameters of the friction materials into account the system assigns the differently dimensioned linings to the respective areas of application and use and accordingly offers a basis for the cooperation and for the exchange of information between manufacturers, distributors and customers.
Structure
WVA Numbers - Allocation Scheme:| Friction Lining Type | WVA-Numbers |
| Drum Brake Linings - Cars | 10000 to 14999 |
| Drum Brake Linings - Commercial Vehicles | 15000 to 19999 |
| Disc Brake Pads - Cars | 20000 to 25999 |
| Shoe Assemblies | 26000 to 27999 |
| Disc Brake Pads - Commercial Vehicles | 28000 to 29999 |
| Clutch Facings | 30000 to 34999 |
| Friction Plates | 35000 to 37999 |