Digidale Conveyors Pvt. Ltd. Supplies Slide Gate Valves for Batch Discharge. Digidale Conveyors Pvt. Ltd. Manufactures material handling system & equipments. Slide Gate Valves for Batch Discharge are used for batch discharging material from a vessel. Material collects until a high level is reached; the system is shut down, and then discharged manually. Slide Gate Valves for Batch Discharge is used for industrial central vacuum systems. The Selection of the type of discharge valve is dependent on the job it is expected to do. There are manual gate valves and many other special application batch discharge valves available.