Automated Valve Graphics

The only thing they could possibly add would be a 3D interactive plug-in enabling the user to remotely control the valve:

http://www.ces.clemson.edu/chemeng/uolab/valve7.htm

Globe and needle valves can be either manually controlled using a valve stem connected to a hand wheel or they may be automated, such that the valve stem is raised and lowered by means other than human action. With valves of this type, the valve opening and fluid flow increases almost linearly with the valve stem position. Normally, a solenoid or pressure diaphragm is used to control the valve stem position. With the solenoid type globe valve, an electrically actuated magnetic coil is used to counteract the effects of a spring acting on the valve stem and sealing disk or needle, which effectively opens and closes the valve. A diaphragm motor acts similarly to a solenoid except a pressure signal acts on the diaphragm to counteract the effects of a control spring acting on the valve stem and disk. Received on Sun Apr 20 12:53:00 2003