The hand wheel device is used for 400*400 and 600*600 plate and frame type fine filters and filters. The hand wheel device is rotated to make the screw rod advance and push the movable cover plate to press the filter plate assembly; and when the hand wheel device is rotated at a high-speed gear and a low-speed gear, the engagement of the hand wheel device has no obvious collision and friction sound with other rotary parts.
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