Does anyone have any tips on connecting from the SAE 'christmas tree' on a Javac pump to silicone hose? Or am I better off taking it out and replacing it with a BSP fitting?
Cheers
Simon

+x

 

Simon99 - 7/4/2020 4:25:29 PM

Does anyone have any tips on connecting from the SAE 'christmas tree' on a Javac pump to silicone hose? Or am I better off taking it out and replacing it with a BSP fitting?
Cheers
Simon

I also have a Javac 141 and struggled with a connector. I found one with hvacstore ; https://hvacstore.co.uk/sealavac-hose-nipple-barb-female-1-4-flare/
The v pumps they sell are very similar to the Javac range, a fact I confirmed with them. The flared fitting is a SAE thread.
I imagine you have it sorted by now but this may help someone else. I stayed with the sae’Christmas tree’ as I bought one of their vacuum chambers.

Hi, I have already purchased that same connection from the hvac store. Be warned, that this barb is too small in diameter to fit to the 8mm ID silicone hose that easy composites sells.

I had to buy one of these connectors and had to chop the barb off and soldered it on to 8mm ID barb that easy composites sells.

I was originally going to get the barb TIG welded but realised that the part from the hvac store is made out of brass and not steel. FYI.

This part from the hvac store works perfect now although I still don’t have a clue what thread it is. When I went looking people were perplexed when I asked for 1/4” SAE.

I still have the other “3/8” SAE” inlet I need to find a fitting for. I’d like to plug this up with something better than the plastic caps that are supplied with the pump.

I’d love to know and see pics of how other people have solved this problem.

I eventually took the plunge and removed the Christmas tree adaptor. I had to hacksaw one of the branches off to get it to clear the handle as its a one piece casting, but it came out without any problems after that. The fitting in the pump takes a 3/8 BSP fittings so I was able to get a 1/4 turn valve to fit in its place and a normal BSP-8mm hose barb.
Just a watch out if anyone else goes down this route, there is very little clearance between the port and the pump handle. I had to take the knob off the valve to get enough room for it to screw in and then refit it afterwards.

+x

 

Simon99 - 7/21/2020 7:26:28 AM

I eventually took the plunge and removed the Christmas tree adaptor. I had to hacksaw one of the branches off to get it to clear the handle as its a one piece casting, but it came out without any problems after that. The fitting in the pump takes a 3/8 BSP fittings so I was able to get a 1/4 turn valve to fit in its place and a normal BSP-8mm hose barb.
Just a watch out if anyone else goes down this route, there is very little clearance between the port and the pump handle. I had to take the knob off the valve to get enough room for it to screw in and then refit it afterwards.

Thanks for that info, I feel inspired to do the same. I feel that I am missing the quarter turn valve in my setup.

For some reason I had thought that christmas tree valve was a one way valve, I was sure I saw a somebody with a similar pump to mine saying not to take that christmas tree valve off as it was one way... I’ve probably picked them up completely wrong.

Would you be able post links for where you got the particular 3/8” BSP fitting and 8mm barb you used?

Also, out if interest, how did you figure out what size of fitting you’d need to screw into the pump?