Segment disc valves work on a very simple but effective principle. The central throttling elements – the segment discs that glide and seal against each other – are positioned in the valve body perpendicular to the flow direction. On a non-rotatable aligned segment disc whose geometry determines the flow rate and characteristic, a movable disc having the same number of segments is shifted by a tangentially engaging rod in such a way that the free cross-sectional area of the segments changes continuously.
Regardless of the prevailing pressure difference, a spring assembly constantly presses the movable disc onto the fixed disc. As a result, the flow direction is variable and the valve can be installed in any position.
This special design makes segment disk valves one of the few valves that combine control precision even in extreme operating conditions with a high seal tightness and very low exposure to wear.
Segment disc valves and segment disc orifices
Perfect and variable control with high precision over a wide flow range is made possible by the segment disc valves from Schubert & Salzer. Due to the robust design and the reciprocal flow direction, segment disc valves are suitable for fluids as well as vapours, even if these are contaminated by particles. The wide range of applications includes areas such as building materials, chemical and power plants, pipelines, water supply and disposal, as well as shipbuilding. This ingeniously simple but effective valve design is available up to nominal size DN800.
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