Although Rotolok manufactures a stock range of round and square outlet valves 6 1/2", 8 1/2", 10 1/2", 12 1/2", 14 1/2", and 16 1/2", mainly to match Screw Conveyor outlets, a full range of standard and heavy duty valves are made in versions: manual, rack and pinion, single and double pneumatic and motorised in sizes up to 5ft. 11" x 4ft. 7".
The Rotolok industrial range of slide valves are simple, but robustly designed to handle powders, pellets and granules over a wide field of applications. They may be operated manually, or by pneumatic means or electric motors, and offer reliable, continuous service with the minimum of attention and maintenance.
The standard range covers most needs, but the basic designs are capable of fabrication to any specified sizes and construction.