Butterfly valve orientation issue
Thread Content
The direction of the pneumatic butterfly valve installed on the particle circulation water pipeline in our facility – which can automatically adjust its opening degree based on the water temperature (a set fixed temperature) – is opposite to the direction of the particle-containing water (as indicated by the arrow on the valve body). I asked the instrument technicians at my workplace about this; they showed me books on instrument equipment and said that butterfly valves don’t have any orientation issues. I didn’t detect any abnormalities during the production inspection, but I still have doubts: is it really okay for the direction of the butterfly valve to be opposite to the direction of the fluid? If there’s no problem, then why are direction arrows still marked on the butterfly valve body? I would appreciate it if experienced sailors could help me figure this out; thank you!
Eccentric butterfly valves have a directionality; installing them in the wrong orientation affects their sealing performance
When butterfly valves with different sealing mechanisms are installed in reverse, the effects vary. For your case, if it’s a ventilation butterfly valve, as long as it can prevent water from entering, there’s no need for much pressure
It mainly depends on the type of butterfly valve you use! Eccentric butterfly valves have a directionality
Generally, centerline butterfly valves have no requirements regarding installation direction. It has no impact
It’s an eccentric butterfly valve; I’m talking to the instrumentation technician and the equipment supervisor about it. I did my best as a worker; whether it gets done is someone else’s concern. Thank you, experts. Please feel free to ask if you have any questions in the future!
There are usually requirements regarding eccentricity, but generally it doesn’t cause any major problems even if it’s installed backwards
On the body of a butterfly valve, the arrows indicate either the direction of pressure or the direction of water flow; these indications vary from one manufacturer to another. Be careful when using such valves. For eccentric butterfly valves, the direction is particularly important; simply check the side under pressure (the side with the shaft) before installation
The arrow on the butterfly valve body generally indicates the pressure-bearing direction.