Non-impact check valve
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Who can provide drawings of impact-free check valves
It’s an axial flow check valve; there are many manufacturers that produce them. You can simply search for it on Baidu by looking at the image
Do you want to make one too? Drawings are generally not provided
If it is to be used, generally the manufacturer will provide it if asked, but some may not
In China, the largest diameter available is 48 inches; these are domestic products manufactured by CNPC, which replace imported compressors.