Parts catalog Nrv Sandvik: 52-200-131060 NRV 6 5/8BX4"… Sandvik 52-200-131210 NRV 6 5/8BX4 1/2 P… Sandvik 52-225-131055 NRV 7 5/8BX6 5/8P… Sandvik 7850-13-1023 NRV VALVE27/8IFBX2… Sandvik 7850-13-1034 NRV VALVE 2 3/8 IN… Sandvik 7850-13-1212 NRV 4 1/2 IN. BOX… Sandvik DT52-200-131060 NRV 6 5/8BX4"… Sandvik DT52-200-131210 NRV 6 5/8BX4 1/2 P… Sandvik DT52-225-131055 NRV 7 5/8BX6 5/8P… Sandvik :