Company Information   Capacity   List of Equipments   Licences & Accreditation   Approvals   Annual Turn Over   Organization   Policy & Goals   Organizational Chart   References   Gate Valve   Check Valve   Ball Valve   Globe Valve Vastas 2011 Profile     Check Valve References Check valve is also manufactured like gate valve since seventies check valves are of cast iron or cast steel. Steel check valves are used properly to prevent back flow at high pressure and temperature lines. Reference List Years of seventies - Fertilizer Plant-Iskenderun - Soda Plant/Mersin- Co2 Compression Unit - Trakya Oily Seeds Integrated Plant-Çorlu Years of eighties - Aletim (Alarko), Contractor - Erdemir, Iron & Steel Works - Kromsan, Chromium Plant - Petkim, Petro-Chemical Plant - Seka, Paper & Cellulose Plant - Temsa, Contractor - Tpao, Turkish Petroleum Corp Years of nineties - Alamsaş Alarko Ağir Mak. San. A.Ş., Contractor - Dopaş A.Ş. Contractor - Ektes Tesisat Taah. San. Ve Tic. A.Ş., Contractor - Entes End. Tess. İml. Ve Mont. Taah. A.Ş.,Contractor - Fürsan A.Ş., Chemical Plant - Gama Endüstri Tes. İmalat Ve Montaj A.Ş., - Grp/Tk/18 Prj, Contractor - İski, Tap & Waste Water Organization - Karadeniz Cupper Works - Tpao Turkish Petroleum Corp - Tüpraş-İzmir Refinery - Tüpraş-İzmit Refinery - Tüpraş Kirikkale Tüpraş- Batman Refineries - Türkiye Gübre San. A.Ş.Turkish Fertilizer Plant  Vastaş 2011 - All Rights Reserved