A water-abrasive suspension cutting facility includes a pressure tank (11) for providing a water-abrasive agent suspension (13) which is under pressure, a lock chamber (21), and a refilling valve for refilling abrasive agent into the pressure tank via the lock chamber (21). The refilling valve (21) includes a valve entry (49), a valve exit (51), a valve space (71) which is arranged between the valve entry (49) and the valve exit (51), and a valve body (67) which is located in the valve space (71). The valve entry (49) is connected to the lock chamber (21) and the valve exit (51) to the pressure tank (11). The refilling valve (19) can assume a first closure position, a first open position and a second open position. In the first closure position the lock chamber (21) is fluid-separated from the pressure tank.