On the opening pressure issue of check valves used in low-pressure gas pipelines
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As the title suggests, it relates to the opening pressure issue of low-pressure gas pipelines. In low-pressure gas pipelines, where the pipeline pressure is relatively low, is it possible to push open the check valve? Is there any specification regarding the opening pressure of the check valve when selecting it?
As the title suggests, check valves are used to address the issue of the opening pressure in low-pressure gas pipelines. In low-pressure gas pipelines, where the pipeline pressure is relatively low, is it possible to open the check valve? Is there any specification regarding the opening pressure of check valves when selecting them?
Yes, it is necessary to require the manufacturer, because some check valves truly cannot be opened; I have encountered that situation before. In the end, no check valve was used.
As the buyer, it is necessary to provide the manufacturer with a data sheet, which certainly includes technical details such as the medium, diameter, and pipeline pressure. The manufacturer can then manufacture the product in accordance with the technical specifications outlined in the data sheet. :)
The process package should include the design criteria and parameters for the check valve, among other things
In this case, a swing check valve is preferred. There is a swing check valve with a very low opening pressure, designed for flange clamping. Please consult the valve manufacturer for details.
It is necessary to inform the valve manufacturer about the medium, temperature, and pressure. Otherwise, it’s really possible that the low pressure won’t allow it to open. There are many types of check valves, with varying opening pressures; one can choose based on the pressure required, and the spring can also be replaced. The smallest one is the thin wafer-type swing check valve. This relies on the gravity of the valve disc to cause it to drop automatically, resulting in a very low opening pressure.
Hello, I have the same question: what type of check valve did you end up choosing?
For applications where the check valve needs to open at low pressure, it is necessary to specify to the manufacturer during procurement what the opening pressure should be, as well as whether there are any requirements regarding pressure drop. Typically, for such valves, axial flow check valves are more commonly chosen.