Duyar is founded in Istanbul 50 years ago. Today, Duyar is one of the leading valve manufacturing and marketing company in Turkey. Cast iron and ductile iron gate valves, butterfly valves, ball valves, metal bellows sealed globe valves, check valves, strainers, brass and stainless steel ball valves, metal bellows expansion joints are in our product range. We also manufacture OS&Y valves, NRS valves, test and drain valves, butterfly valves with supervisory switch, wet alarm valves, and sprinklers for fire system installations. The Duyar corporate philosophy is to bring to the market new and innovative valve designs with special emphasis on quality, safety, ease of operation, simple in-line maintenance and most of all, long service life. All this, combined with the use of high quality materials and advanced manufacturing technology in all stages of manufacturing, ensures the highest possible quality at a competitive price.