Jigging Machines for Coal & Minerals are specialty offerings from Ingwenya Mineral Tech – with the IMT Under Bed Pulsated PLC Controlled Jig is entirely manufactured in India and has a number of improved process and mechanical features. The intermittent supply and exhaust of Jigging Air into the Air Chamber beneath the Jigging Bed is controlled electro - pneumatically through a Piston Valve System. As the feed advances along with the Jig Pulsation of water, it gets stratified in Density Layers.