All of Erie Technical Systems products are available with many different features and options. The bulk bag unloader is no exception! One option that we offer to our customers is the roller gate valve. This includes a 304SS 10” diameter roller gate valve with pneumatic controls for an adjustable 3-position closed controller package. The valve is able to vary positions to open, closed and dribble feed in order to control the flow of the material out of the bulk bag. This option is a great feature for many applications! If you have any questions or want a quote contact us at info@bulkfilling.com or (814)899-2103