Cadel Engineering Works supplies Single Lock Valve with Three Locking Position .Cadel Engineering Works offers different types of valves. Single Lock Valve with Three Locking Position is ideal to control the flow of powders, granules, flakes, crystals etc. Single Lock Valve with Locking and Unlocking Arrangement is available with flexible diaphragm which is fitted with flanges at both ends. The flange at the upper end is held stationary while the flange at the lower end is rotated so as to twist the diaphragm.