- Koyuncu is a gas and gas equipment company based in Istanbul, Turkey. - Our equipment business has a vast majority of product line including gas cylinders, cylinder bundles, cryogenic equipments, valves, regulators, etc.... - We have a state of the art gas filling plant at Kocaeli, Turkey. - We produce 17025 accredited gas mixtures at %, ppm and ppb levels. - We import liquid helium and serve our helium customers in liquid and gas forms. - We fill industrial and medical gases. - We fill food grade gases as per ISO 22000. - We provide liquid gases to gas companies with our cryogenic tanker fleet.