Oil Turbo Compressor Co. (OTC) was founded in 3rd Jan. 2001 by investing of NIOC Pension Fund. OTC is the one ofmost important partner of Siemens to localize and manufacture of Turbo Compressors and Turbo Generators in mid Rang (17-45 MW) in IRAN. OTC works as a holding company with some its subsidiaries. 1- The 1st Iranian Turbo Compressor & Turbo Generator Manufacturer in mid range (17-45MW) with Siemens Technology. 2- Designing and Engineering of Gas Boosting Stations & small Power Plants. 3- Manufacturing and supplying of wide range of Off- Gas Compressors, Refrigrant Compressors, Ethylene Compressors and Gas Injection Compressors.