Gas flow controller and a valve pin for a gas flow controller

Abstract

The invention relates to gas flow controllers, for example to gas blender units such as an air/oxygen blender (2) for healthcare use, and to a valve (8) and valve pin (20,120) suitable for use in such a flow controller (20). In particular, a medical gas blender (2) is provided that avoids the need for pre-regulation by incorporating one or more flow control valves (8) having a high turndown ratio. Valves suitable for use in such a blender, or other flow controller (2), are also disclosed.

CPC Classifications