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ello, I am trying to design a emergency trip lever which is hinged at one end and closes the steam valve under the action of spring force.Valve shuts off by impacting on valve seat. Please Refer the figure. I want to calculate the spring stiffness for the motion of 12 degrees within 1 second...

Thank you for you response gerhardl. Steam pressure is 4.2 MPa. valve dia =80 mm. So constant force of 846.46 N acts against the lever in vertically upward direction. And as a project, I am trying to develop this system so commercially available system could be the reference. But I could not...

@ RVAmech: No, I have just started job and got this project.

Hello, The lever is pivoted and not hinged as written in the figure. y in differential equation is angle rotated by lever in counterclockwise direction from open position. Thanks.

Hello, I am trying to design a emergency trip lever which is hinged at one end and closes the steam valve under the action of spring force.Valve shuts off by impacting on valve seat. Please Refer the figure. I want to calculate the spring stiffness for the motion of 12 degrees within 1 second...