Anaesthesia Anaesthetic equipments d220a607 In magil circuit airflow is - A 1/2 of minute volume B equal to M.V. C 2 X M.V. D 3 X M.V. High-Yield Explanation In Magills it fresh gas flow is equal to minute volume. In Bains co-axial system or type D ,fresh air flow required to prevent rebreathing is 1.6minute volume