Instrument air at power facilities on Singapore's Jurong Island (such as the Banyan/Sakra region, which hosts Sembcorp’s 600MW hydrogen-ready plant) typically requires high-purity, dry, oil-free compressed air. Key specifications often include a dew point 10°C below ambient, solid particle filtration <3.0 microns, and pressures of 8.5–8.8 barg.
For specific, detailed technical specifications of the instrument air system for a particular plant (e.g., Sembcorp Cogen), it is best to refer to the official design documents or technical data sheets for that specific installation.