Wallbro bellows

Duco55

Member
Another issue.
I have an external Wallbro-Wep11 6V petrol pump. It was New Old Stock. Before the summer I tried it and it did nothing. Upon opening I found the bellows completely gone ( to goo, and never contact with any petrol). I tried ordering a replacement bellows in a revision set, but do not get replies from the vendor. I decided that I will try to print them on a 3D printer and am therefore testing different filaments that are flexible and petrol resistent (ethanol and additives). They are now 8 weeks in petrol and I see no difference yet. I was told to also try teflon and maybe Viton ( if available in filament for 3D).
Any thoughts? Did somebody try this? What Alternatives? ( SU 6V to low pressure, maybe a Carter?)
I could replace the mechanical one but like the electric one beter as it primes)
Hope to hear
regards ( met vriendelijke groet)
 
3D printer! WOW I wouldn't have imagined that would have even been an option. You may be one of very few modern and knowledgeable enough to use that technology. Please keep us posted. Maybe there are more using it than I know, but I am impressed.
 

Duco55

Member
I am using a specialist . I have a design, but if somebody has more details (wallthickness?), that would be great. Than the design needs to be programmed. Meanwhile these tests need to be done to decide upon material . Than some test prints.. If all is ok, printing larger numbers is not very expensive. And there is no test like using it in real. But still, it is a nice idea. I may even start a business!!
 

Duco55

Member
update: Teflon is available but almost impossible to use as environmental issues need an expensive controlled set up and special ( also expensive) printer. Viton might be a solution, but is not ( yet) available as filament.
 

Duco55

Member
Update: first print was not ok. Not flexible enough due to wall thickness. Next week another try.
Groet
Duco
 

Jenz38

Active member
Nice to see, what for energy you put in this project...
respect.
A 3D printer ,.. amazing,what for options are possible with this Tool.. 😎👍🏼
 

Duco55

Member
Yeah, well it is not my own, but there is a small company nearby. It is an experiment which they like as well. The problem is the material to be used. It costs a bit to make the design and find the way to prepare the printer ( heated environment. etc). The total cost may exceed an alternative pump. But alas. I do not want to redesign the installation of pipes and pump. The best alternative seems to be a Carter.
So If we succeed I hope there are many to need the bellows as well so we can slot costs!!
And Yes, there should be many possibilities for 3D solutions. I saw a new development. Rather than using a filament there is now a liquid. It gives a much smoother surface.
Schone Sonntag
Duco
 

Duco55

Member
Hi CJ, thanks. I did write to them twice and even ordered the kit (double). But I got no reaction and no parts. Maybe because I am in Europe. That is the reason I started looking for something else. I like the looks of the walbro and would prefer to use that.
Groeten
Duco
 

CJ

New member
I guess I will not be recommending them in the future. Take a look at this:
I talked to them and they do ship to Europe. I was told that when ordering on the web site it will calculate the shipping.
The nice guy on the phone even checked their inventory and said they have plenty on hand.

cheers
CJ
 
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