i found a electric pump with these specs… is it big enough? 20hg 20psi max, 1.3cfm open flow, GE Motor 115v single phase 1725 rpm 1.6 horse thermo protected, 0.12kw… pleas help
if you can find one with 24 or 25hg you would have more success. I used a 20hg one for about 2 weeks and I thought it did not pull enough, if for infusion it WILL NOT work
cool thats what i was wondering. thanks we use 25 hg for composite repairs but never tried infusing before. we pull about 20 to 25 with venturi pumps but im looking for a 100 or under vane that will work.
if you are infusing you want to try and get as close as 30hg as you can!
Do you think 29" will be anough to infuse properly (that pump’s free for me) or should I spend the $$ and get the sub 40 micron pump (29.9") ?
i have infused with 29hg and worked well. I am using a $200 pump that is pulling 29.4hg and works fine for me
I’ve seen some 40 and 50 micron HVAC pumps kicking around ebay for about $200 and I’m trying to decide if the extra half inch of suckage is worth the extra expenditure.
I guess what it comes down to is that if the difference in vacuum determines sucess versus failure, it’s worth it. If the different pumps will only change the fiber to resin ratio by a couple of percentage points, then it’s probably not.
FWIW, I’ll probably be using a relatively viscous (950 cp) epoxy to infuse 4-5 layers of 5.7 plain weave cloth. The layup will be reinforcing mitred and epoxy bonded carbon tubes on a bicycle.
beware of buying pumps on ebay. most are sold as new but are actually refurbished.
yep! and make sure to get one with a warrenty!
I’ve seen new units too for pretty much the same price, but that’s not really my concern – I really just want to make sure I have the right tool for the job.