Valve for hydraulic fracturing through cement outside casing

A valve includes; a housing having an opening; a mandrel disposed in the housing, the mandrel having an opening; a rupture disk disposed in a passageway of the mandrel;a sliding sleeve disposed between the housing and the mandrel; and a ball seat disposed in the mandrel. A method for actuating a includes: flowing a fluid through the valve; dropping a ball; seating the ball in the ball seal and blocking fluid flow through the mandrel; flowing fluid through the passageway to the sliding sleeve; moving the sliding sleeve axially within the valve; and exiting fluid through the openings of the housing and mandrel A valve includes: a housing having an opening; a mandrel disposed In the housing, the mandrel having an opening and a passageway; a sliding sleeve disposed between the housing and the mandrel; and a bail seat disposed in the mandrel blocking fluid communication between the mandrel and the passageway.