Selection of control valves
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The pressure difference before and after the control valve is around 4 MPa. During the construction phase, a single-seat valve was chosen to save costs; however, after it came online, it was found that the control valve didn’t function at all and there was significant leakage. Do any experts have any good suggestions? Which manufacturer have you used? Hydrogen in the medium
This post was last edited by hfrs on 2017-2-5 at 16:08. How can choosing a single-seater option save money? It’s actually a waste of money; have the design redone. This also highlights one issue: companies are always reluctant to spend a lot of money on hiring high-calified professionals in the field of instrumentation; such companies don’t even know how much a valve costs.
Brand of imported pneumatic control valve: German Samson； Aka ； U.S. FISHER ； Fors ； Finland Metso ； U.S. Meso ； Walker, USA ； Yamaki, Japan ； Japanese tooling ； These are commonly encountered in bids for coal tar hydrogenation projects.
We’re using tooling now; what form is it in? Can a corner valve be used?
A sleeve valve can be used; an angle valve for high-pressure applications is also an option
For control valves with high differential pressure, the flow rate, temperature, diameter, and such factors generally require a cage type design
A single-seat control valve shouldn’t experience the problem you mentioned, unless the valve core is damaged or the actuator for the valve is too small