Are the reducer pipes on both sides of the control valve concentric or slightly offset?
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I would like to ask everyone: should the reducing sleeves on both sides of the control valve be concentric or eccentric? Should they be at the same level as the pump inlet, with the gas at the upper level and the liquid at the lower level?
Typical control valves have an eccentric design with a flat bottom, to facilitate overall support of the pipeline.
Hello, I have a question: isn’t it necessary to consider low and high levels at the inlet of this device, just like in the case of pumps? And for gas control valves, isn’t it also necessary to take low and high levels into account?
Generally, the large and small ends before and after a control valve are eccentric with flat bottoms; I’ll think again about why that is.
Bottom flat eccentric, plus a drain valve
The reason is as mentioned in the five points: purity must be added. Furthermore, for horizontal pipes, unless they are pipes connected to pumps, they generally have a flat bottom; the exact reason for this is unclear – it might be due to convention – but in my experience, it’s easier to construct pipe supports when the bottom is flat
The amount that can be released varies. It depends on the condition of the control valve; for emergency shut-off control valves, they need to be installed both upstream and downstream.
It is better to choose a reduced-diameter fitting with a flat bottom, as control valves are primarily used to regulate flow rate; they usually operate at a low opening degree. Therefore, a reduced-diameter fitting with a flat bottom results in a more stable flow velocity, preventing any changes in flow rate from affecting the quality of regulation.
Hello, I have a question: is it the same for gas media as well? Thank you!
It is usually eccentric, but if you use the H standard, only the concentric ones are available.
Eccentricity is known; the question is whether to take into account the gas being at a higher level and the liquid at a lower level. Thank you for your guidance