Control valve

for gascompacthigh-pressure

Control valve manufacturing started in 1960 under the brand of Nuovo Pignone and since then, its technology has been continuously improved. With over 160.000 valves installed worldwide, compliant with the most stringent international standards, the Nuovo Pignone Antisurge valve center of excellence is located in Bari (Italy), with capacity and aerodynamic noise testing facilities. The design and production are certified ISO9001 and ISO/TS29001. Nuovo Pignone Antisurge Valves are an integral part of the centrifugal compressor protection system and fit the most severe operating conditions in all market segments, such as: • Upstream gas re-injection, handling high pressure sour gas with API 6A Valve and Low Emission stem packing system, installed up to 830 bar. • LNG main refrigerant and boil-off, designed for low pressure drops and high flow rates able to operate in off-design conditions at very low temperature down to -196°C. • Floating Production and Storage Offloading, (FPSO) requiring special compact design and internal material selection necessary for bi-phase flow conditions. • Fertilizer plant compression services with high pressure and temperatures. • Compressed air energy storage. Design Features Dynamic response of each valve is tuned and validated at the factory acceptance test. Fast and stable response to step and sinusoidal control signal. Absence of overshooting and very low hysteresis. This allows very reliable and dynamic accuracy that minimizes the compressor «margin to surge» thus enabling the compressor to run in a wider operating range with associated lower operating costs.