Anti-surge valves (ASVs) meet the most stringent requirements, and in the event of a disturbance must open lightning fast, with precise positioning and absolute reliability. ASVs are often used with axial compressors in the steel industry. One of the world’s leading compressor manufacturers selected Arca anti-surge valves for its compressor stations at a steel mill in Taiwan.
ECOTROL control valves are used to secure the compressor for the blower that supplies air to the blast furnaces. An air supply of between 4 and 5 bar is required in order to achieve sufficiently high temperatures for combustion in the blast furnace. If during this process there is an increase in pressure on the consumer side, a return flow will occur in a fraction of a second. For the compressor, this means that the pressure will abruptly increase and the consequence is backflow and flow interruption, so that the compressor accelerates due to this cyclical action.
The consequences would be severe, and there are multiple dangers, from damage of the machine blades to total machine loss. To prevent this, the hydraulically-controlled valves must react in less than one second in the event of a fast-acting trip. This means opening in less than 1,5 second maximum dead time of less than 100 ms – at a very high volumetric flow rate and the most stringent requirements on the control performance. This is a highly demanding task, where there is no second chance. Arca’s world-class technology convinced the manufacturer.
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