Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!
The term Normally Open (NO) applies to manual valves or dampers which the operator must leave open in normal operation.
A control valve that should go to an open position on a control signal failure should be labeled FO, i.e. Fail Open. The control signal may be pneumatic, hydraulic or electric.
Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse!
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