... 95% Output/per spout 15t/h Impeller type(3 spouts)cement packer1.Summary GBD series impeller stationary type cement packer is our new ... -2), three spouts (GBD-3), four spouts (GBD-4), four models.2. Structure and Functions GBD series impeller stationary type packer mainly includes ... bag falls off and leaves the packer, inclining to outside. Impeller type(3 spouts)cement packer