Howden supplies the Donkin range of "SG" integrally geared, single stage turbo-compressors. Modular single stage units providing flows up to 35m3/s and pressures up to 3 bar. For special applications, engineered single-stage turbo- compressors are available to provide flow rates of up to 50m3/s and multistage turbo compressors for pressures of up to 5 bar.