In what situations can it be useful or necessary to use a globe valve for an on / off service, as an isolation valve? The situation that I am dealing with is with valves installed on pipes downstream a steam condenser, I was expecting some ball or gate valve. Am I overlooking some obvious aspect?
Hi,
Please ensure about on/off service of the valve. In the same situations, downstream of steam condensation, generally a control valve will be installed to automatically adjust the condensate flow rate, say, based on the condensate level; but it might in your case this control valve (normally globe type) will do the job manually.
Dear Fallah and other colleagues,
thank you for your answers.
As for the on/off service, it is what I have found in a valve list provided by the condenser supplier. It seemed strange to me too.
I'll describe more precisely the situation. It is a revamping of a steam air cooled condenser, where new modules are being added. So a new LP steam line starts from the old one to feed the new modules, and a new condensate line is then connected to the old one, downstream of the new modules. The manual valve is installed on this condensate line. So what I thought, looking at the P&ID, was that a manual globe valve would have been useful to "tune" the system (in addition to adjusting the fans speed during normal operation) and balance the flowrates.
Edited by Estiqaatsi, 03 November 2021 - 03:40 AM.