Visvana , established in Istanbul in 1983, is one of the biggest valve manufacturer in Turkey.To provide product quality, Vis Vana keeps improving its production systems. Moreover, Vis Vana has been a member of ISO 9001:2000 Quality Management System since 2003 and Vis Vana has also CE Certificate and Turkish Standarts Institutions Certificates.With these strategies, Vis Vana continues to develop
and improves its reputation for performance and reliability of all its products manufactured in Turkey.
