Maximum Flashing Rate from a Control Valve
Maximum Flashing Rate from a Control Valve
(OP)
I'm working on a system that uses a control valve discharging into a flash tank to concentrate a stream. Currently the system flashes about 10% of the flow; the client has suggest looking into flashing 52% of the flow.
I've been trying to find a guideline on the maximum amount of flashing allowable through a control valve, with no luck. Has anyone worked on a similar process and can tell me if there is a guideline?
I've been trying to find a guideline on the maximum amount of flashing allowable through a control valve, with no luck. Has anyone worked on a similar process and can tell me if there is a guideline?





RE: Maximum Flashing Rate from a Control Valve
Or are you saying that the whole stream is sent through a valve where 10% of that stream flashes as a vapor stream of steam?
If the first is true, then just get a bigger valve, and possibly a larger flash drum.
If the second is true, then the only way to get more of the stream to vapor is to either heat the stream going into the valve of lower the outlet pressure of the valve to get more vapor.
RE: Maximum Flashing Rate from a Control Valve
Thank you for your help.
RE: Maximum Flashing Rate from a Control Valve
Good luck,
Latexman
Technically, the glass is always full - 1/2 air and 1/2 water.
RE: Maximum Flashing Rate from a Control Valve
Is this steam or some other liquid?
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Maximum Flashing Rate from a Control Valve
RE: Maximum Flashing Rate from a Control Valve
It is possible that a [throttling] valve not designed for flashing could be damaged by cavitation. You should consult with a valve vendor to know what valve trim is best suited to this application, and delta-P limits, if any.