Properties of axial flow check valves
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Dear experts, may I ask to which category of check valves (lift-type, swing-type, butterfly-type) does the axial flow check valve belong? Or form a separate faction on one's own? Is the butterfly type the same as the clamped type?
It’s hard to say the same for axial flow valves; they only appear similar to pipe shortcuts in appearance. Their internal structure can vary – some rely on the gravity of the valve core for closure, some use springs for that purpose, and there are also those with single or multi-port valve discs. It’s enough to understand what he is saying and to make it correspond. However, a butterfly check valve is one that, like a butterfly, has two central shafts to hold the two disc plates in place, and it uses a spring to ensure closure – this is what constitutes a butterfly check valve. You can search for pictures online. I’ve never heard of this “axial flow check valve” before; just for reference.
Axial flow check valves form their own category, referring to standard GB/T21387； Is the butterfly type the same as the flanged type? The butterfly type refers to its structural form, while the flanged type refers to its method of connection; there is no direct relationship between the two. However, all butterfly check valves I have seen seem to be of the flanged type – I have never encountered any with flanges, maybe I just didn’t pay enough attention.
The type with one shaft and two plates is a double-disc swing type; it is not called a butterfly type, as the butterfly type features one shaft and one plate.
Wafer, flange, butt welding, etc., are the connection types of valves, while single-disc swing, double-disc swing, lift, axial flow, and butterfly are the structural types of valves.
Oh, maybe it’s a problem with my language expression. Butterfly shapes are divided into single-petal and double-petal types.
An axial flow check valve is of the axial flow type; there are many varieties of axial flow valves. The best ones available currently are flow and pressure regulating valves, which can also be considered axial flow check valves； As for the second question, butterfly check valves are considered to be slow-closing check valves; models such as HH48, 49, 47H fall into this category, and they are known as butterfly slow-closing check valves. As for the wafer-type check valves, the relevant model is H76X; there are wafer-type valves with a single valve disc as well as those with a double valve disc! Please point out any shortcomings! You can also send a private message within the site! I’ll reply right away once I’m logged in!
Structurally, it belongs to the lift-type category