Directory Transportation Hopper Gate Openers Arnold Co. Multiple power configurations: pneumatic, AC electric, DC battery or open hydraulic Self-contained two-wheel portable units‚ hydraulic lift and side shift options Beam-mounted units with hydraulic powered vertical and horizontal movement Request More Info Fill out the form below to request more information aboutHopper Gate Openers More From Arnold Co. Multi-Position Hopper Gate Opener 85 to 140 feet/minute variable travel speed Ride-On Hopper Gate Opener Operators can now control automated unit from a seated position Vibration Solutions Door Demon Hopper Trailer Opener - HTO Lightweight and air powered with smooth continuous torque Hopper Gate Openers