Gate Valve Actuator Sizing
Gate Valve Actuator Sizing
(OP)
I am interested in a force that might not normally be considered in actuator sizing for Gave Valves. Normally considered forces are stem friction, seat friction, and hydrostatic. However, it seems there is another force that could be significant under some circumstances, e.g. a higher viscosity, and a high velocity in the pipe. I call it a hydrodynamic force that would vary from open to closed and vice versa.
How can I calculate this hydrodynamic force of pushing a gate into a very fast moving stream (excluding the forces stated above)? It seems that viscosity, velocity, and Reynolds number are key to this value. With regard to velocity, my question would involve an open ended pipe just downstream of the gate valve with plenty of flowing pressure and volume upstream of the valve.
How can I calculate this hydrodynamic force of pushing a gate into a very fast moving stream (excluding the forces stated above)? It seems that viscosity, velocity, and Reynolds number are key to this value. With regard to velocity, my question would involve an open ended pipe just downstream of the gate valve with plenty of flowing pressure and volume upstream of the valve.





RE: Gate Valve Actuator Sizing
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Gate Valve Actuator Sizing
RE: Gate Valve Actuator Sizing
I would be interested to see if there is such a force, but if so I've never come across it for a gate valve.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Gate Valve Actuator Sizing
I actually do have an application and reason for asking this question but I need some definitive info before I can proceed to resolve the issue. If this force is negligible for all process conditions then great - no problem. If not negligible then it is a significant problem that would require entirely different valve types and actuators. The existing actuator force can not be increased.