Profile: Rotolok (Holdings) Ltd. specializes in manufacturing rotary valves and material handling products. Our products include rotary airlocks, diaphragm valves, slide valves, diverter valves, double dumps, conveyors, dampers, and tanker loading. The prime function of a rotary valve is to regulate the flow from one chamber to another while maintaining a good airlock condition. Our standard rotary valve is mainly in dry powder or granular form. In the dust filtration field, good airlocks are essential on cyclone and bag filter application so that the manufacturer's quoted high dust collection efficiencies can be maintained. Airlocks are also important in the pneumatic conveying industry, where product is regulated into a high pressure conveying line while minimizing air leakage.