Emergency Valve Selection
Emergency Valve Selection
(OP)
am wanting to select a emergency shutoff valve in accident operation.
But I have no idea of the emergency valve. Could you tell me the ways to select the emergency valves and how to choose the type of emergency valve?
I normally see the emergency valve is ball valve. Why?
Thank you in advance.
But I have no idea of the emergency valve. Could you tell me the ways to select the emergency valves and how to choose the type of emergency valve?
I normally see the emergency valve is ball valve. Why?
Thank you in advance.





RE: Emergency Valve Selection
If not go talk to a Piper.
If you are a piper then go to "Google" and "ESDV" for some general information.
Then select a valve that meets the criteria for the applicable Line Class.
Then talk to a valve vendor.
RE: Emergency Valve Selection
Often emergency valves are ball valves because they are fast acting, high torque, least likely to stick or scale up, and have better shutoff (closer to 100%) than other valves.
RE: Emergency Valve Selection
Orbit valves are used too. They are like ball valve but in a manual operation they take 10 or more 360 degree turns to close, however, they can be automated to close very quickly.
I usually do not get concerned about time to close on emergency valves. The amount of flow over a several minute time span to close as compared to hundreds of thounsands of hydrocarbons already in the area where the emergency is not significant.
RE: Emergency Valve Selection
It IS impressive to see a 36" butterfly snap shut in 0.2 seconds. Also a good idea to call the local seismographic office ahead of time.
RE: Emergency Valve Selection
I have some idea of emergency valve.