Vertical check valve structural length
Thread Content
Currently, the standard 12221-2005 for the structural length of valves specifies only the structural length of straight-through check valves, and not that of vertical check valves. One check valve in my fire water system is broken; its specifications are DN50 with a length of 105 mm. I would like to ask the experts here: is this length based on some standard or is it non-standard? I looked up some data online; the structural length L of vertical check valves is 170 (the same length applies to the DN50 one-way valves used for material transfer in the actual devices). Which standard does this refer to? Thank you all!
Many valve manufacturers do not design their valves in accordance with this standard for the length of the valve structure; the lengths vary from one manufacturer to another. In your case, it is likely necessary to contact the original manufacturer and purchase a new valve.
What material is this valve made of? There’s no absolute standard