Nozzle Life

             This is aprroximate service life in hours from several manufactures

 Nozzle Material     Steel Shot & Steel Grit Media    Slag Media           Aluminum Oxide Media

 ALUMINUM OXIDE              20-40                                  10-30                            1-4
 TUNGSTEN CARBIDE      500-800                            300-400                         20-40
 BP200 SIAION                    500-800                            300-400                         50-100
 SILICON CARBIDE           600-1000                          400-600                         50-100
 BORON CARBIDE           1500-2500                         750-1500                      200-1000
 ROCTEC                            2500-5000                       1500-3000                    1000-2000