Box 603 SE-661 29 S"FFLE Sweden
The VST-SE valve is primarily used in industrial and utility power plants for the conditioning of auxiliary and process steam. It features excellent rangeability, due to its steam atomising pipe which draws high pressure steam from the valve inlet to atomise the incoming spray water, as well as its integrated water proportioning system which ensures that the spray water and steam is controlled simultaneously. Its rangeability makes it suitable for process industries which typically require accurate and stable steam pressure / temperature control under a broad spectrum of operating conditions.
The spray water enters the valve through a water flange near the actuator yoke and is then admitted into the hollow valve stem through a series of calibrated holes in the upper part of the stem. The cooling water or condensate is injected into the centre of the steam flow in an area of high velocity, minimum pressure and very high turbulence. These factors contribute to a very efficient mixing and very fast evaporation of the spray water.
Steam at temperation is achieved by the injection of finely atomised water into the low pressure section of the combined pressure control and desuperheating valve. The coolant enters the valve through a water flange near the actuator yoke and is then admitted into the hollow valve stem through a series of calibrated holes in the upper part of the stem (water flow control section). The stem is an integral part of the steam control plug.
Product Specifications
Leakage rate
Valve designation guide
Typical application of the steam conditioning valve
Valve configurations
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