air is being suck by the distribution main
air is being suck by the distribution main
(OP)
hello everyone.
we have tried putting an air release valve at the highest point of our distribution main. what happened was instead of air being released, air is being sucked by the pipe into the distribution main. can somebody explain this?
we haven't put the ARV yet, only the ball valve at this point.
thanks
we have tried putting an air release valve at the highest point of our distribution main. what happened was instead of air being released, air is being sucked by the pipe into the distribution main. can somebody explain this?
we haven't put the ARV yet, only the ball valve at this point.
thanks





RE: air is being suck by the distribution main
http://virtualpipeline.spaces.msn.com
RE: air is being suck by the distribution main
You either have to increase the system pressure or reduce the amount of water drawn off.
IF supply is not potable water then you can operate with a siphon (air valve closed sub atmospheric pressure), but you need to check that the pipe and joints are structurally able to sustain the vacuum pressure. You would also need to be sure that negative pressures particularly under transient (water-hammer/surge conditions) do not fall below vapour pressure.
RE: air is being suck by the distribution main
RE: air is being suck by the distribution main
RE: air is being suck by the distribution main
RE: air is being suck by the distribution main
RE: air is being suck by the distribution main
http://www.valmatic.com/technicalpapers.jsp
has papers on air in pipelines and on air valve sizing.
RE: air is being suck by the distribution main