... self-locked. Nantong China-Mining electric hydraulic palatal type gate using electrohydraulic push rod, full hydraulic transmission, push pull all can realize ... Palatal type valve is made up of ontology, fan-shaped disc, axle, gear, seal, actuator etc. Manual or actuator ... loading device, then loaded by actuator drives rocker, make the disc replace reset, close cut down the dropping material.Six, ...