Valves Uprates

 Customized engineered solutions to increase the output, performance and life of your plant.
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Control Valves

Low Fugitive Emission stem packings

Valve upgrades are available to comply with recent Fugitive Emission requirements (eg., IPPC). Our valves are designed to control emissions at operating pressures of up to 830 bar. These solutions are ISO 15848-1, class B certified.

Upgrades are available to match the emission level required and the operating conditions. The condition of the packing can also be checked during valve operation.

Upgrade of Anti-surge Control Dynamics

Old anti-surge system designs fully open solenoid valves with a response time of 2 seconds or less in order to guarantee the safety of the machine if the operating conditions approach the surge line of the compressor operating map. This course scheme is a cause of emergency stops and a consequent loss of productivity.

New anti-surge system designs control the opening of the valve continuously (from fully closed to fully open) for a smooth adjustment of the flow rate up to the surge line. To assure reliable operation, the response of the valve must be validated by dynamic tests during the design, manufacturing and adjustment phases. Our quality management processes have all of the necessary testing and analysis operations built into our production process in order to provide an effective set of valve parameters.

The meticulous attention that we pay to the response of our anti-surge valves leads to:
  • minimized overshooting during valve adjustment steps
  • reduction of stroke time in response to control signal step changes
  • stable response to sinusoidal signals

The result is improved life cycle and extended MTBF of the valve and compressor.

Stop/Ratio Gas Turbine Control Valves

The MTBF of Stop/Ratio Gas Turbine Control Valves is highly correlated to the quality of the lube oil used for valve actuation. Since the same oil is also used in the sealing system, it is possible that under certain conditions the oil can become contaminated and cause valve control failures. GE Oil and Gas suggests a purification system that can extend the valve MTBF. This enhancement has a very high return on investment that results from higher turbine availability and increased production.

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