Page 1 of 1
Make a butterfly valve
Posted: Tue Aug 01, 2006 4:46 am
by MrCrowley
should this topic be in here or in another thread?i dunno anyway..
can you make a homemade butterfly valve?then you could have like a 3"valve with nothing stopping flow apart from 1cm thick piece of pvc.
could you use something else other then pvc pipe as the flap that turns?
i was thinking a metal lid to this chocolate milk powder stuff ive got but not sure how much pressure it would hold.
i dont know if this would work so dont go all ape on me saying its the worst idea youve heard.
edit:i just thought of using a 2" end cap like some piston valves use i believe.
Posted: Tue Aug 01, 2006 4:56 am
by carlbelcher
Just keep in mind that with a 3" valve @ 100psi there will be 471 pounds of force on the plate of your valve.
Posted: Tue Aug 01, 2006 9:43 am
by Velocity
Well building a homemade butterfly valve WOULD be difficult... so why not just make a piston valve with 3" porting? It would open faster (butterfly valves open fairly slowly [not quite as slow as ball valves])
Posted: Tue Aug 01, 2006 11:40 am
by WOW!!
You can try going on Ebay and lookin they have some on there with some good prices.
Posted: Tue Aug 01, 2006 11:50 am
by CS
Posted: Tue Aug 01, 2006 9:11 pm
by M3NT4L
Sure you could try, why not make a moded sprinkler valve or piston. Thy open better and wont blow out on you.
Posted: Tue Aug 01, 2006 11:31 pm
by MrCrowley
its hard to get parts for sprinkler/piston valves where i live and its really expensive
Posted: Wed Aug 02, 2006 12:12 am
by M3NT4L
Where DO you live maybe i can help you out and buy ift for you. Ill be happy to help you out
Posted: Wed Aug 02, 2006 12:16 am
by MrCrowley
i live in New Zealand,for comparing price a piece of pipe equivilant to sch40 3"dia 3' long is $60NZD here and 1NZD=0.61USD.
to build a piston would cost alot of money for me as fittings bigger then 3" cost like $60pressure rated, as you need a 3" or 4"tee in most pistons as i remember
edit:no point shipping supplies to NZ cost too much.ive looked at many piston valves for spudguns on this site over a month or two but i dont know which valve is easy to build,works well(has been tested prefably not a draft that hasn't been made)and a piston for my needs, e.g few parts,no machining,good flow for a GB cannon with a 4"dia 4' chamber.
i got a pieve of 4" pipe 4.6metres long and rated up to 173psi for $15NZD
and my GB barrel for free from the same guy
my 100mm adapter end cap thing cost me $40NZD on my combustion so thats how expensive shit is here