Vac air from ALL extractor hoses?

[BigJohnny]

We added an MT69 to our arsenal, and it's working great except I've noticed one small problem in general.

When doing the first vac before a run the idea is to vac down all of the hoses and anything containing atmospheric pressure.

The problem is that everything coonected to the output side of the recovery pump can't get vac'd out because of the one way valves on the recovery pump.

That means all of the hoses and the MT69 are full of plain old dirty air when we start running, and it's going to push this air into our recovery tank.



Does anyone have a solution to vac out these hoses and NOT pump any atmosphere into the recovery tank?

 

[Kcar]

If your port is near your tank, then opening both the low side and high side gauge valves should let them whole system be vac'd down

 

[Chonkski]

http://www.amazon.com/gp/product/B0..._m=ATVPDKIKX0DER&pf_rd_r=13TDV2P4CKWV14J66Y3A

 

[Roji]

What I do is: Connect the hose to the recovery tank vapor port then I open the tank valve a small amount and let it bleed butane out the hose at the recovery pump side as I am tightening the fittings to the pump outlet. This pushes out all the air and replaces it with butane vapor. No need to vac that line.

 

[BigJohnny]

What I do is: Connect the hose to the recovery tank vapor port then I open the tank valve a small amount and let it bleed butane out the hose at the recovery pump side as I am tightening the fittings to the pump outlet. This pushes out all the air and replaces it with butane vapor. No need to vac that line.

thats a good idea actually.


All of our hoses do have ball valves, but if I were to bleed out the air in the manner suggested here, I think that would work just fine

 

[Chonkski]

I used to burp my hoses as well, but now I feel that pulling a vac is more proper.

 

[BigJohnny]

I used to burp my hoses as well, but now I feel that pulling a vac is more proper.

that still comes back to how to pull vacuum on those hoses and keep them vac'd.

From the output side of the recovery pump there are two hoses and an MT69. Since the recovery pump has valves to prevent backflow, I can't pull a vacuum through the pump to those hoses.

If I disconnect the hoses then there are still going to be parts that don't have vac when I reattach them.

I agree with you though, vac would be better.

 

[Roji]

that still comes back to how to pull vacuum on those hoses and keep them vac'd.

From the output side of the recovery pump there are two hoses and an MT69. Since the recovery pump has valves to prevent backflow, I can't pull a vacuum through the pump to those hoses.

If I disconnect the hoses then there are still going to be parts that don't have vac when I reattach them.

I agree with you though, vac would be better.

You would add a T fitting with three female flares , a ball valve shown in this thread above and a third, hopefully short hose. so it goes: pump-->short hose-->T-fitting-->long hose to mt69 and on to the tank with the T fitting holding the ball valve fitting for drawing a vacuum.

Would that work for you?

 

[pharmco]

I pull vacuum on my actual system via the vacuum valve, leaving all the other valves open, so that vacuum is drawed from my recovery pump, the lines from the system to pump, and pump to cylinder, and lines cylinder to system.

All my lines seem to purge this way.

 

[BigJohnny]

You would add a T fitting with three female flares , a ball valve shown in this thread above and a third, hopefully short hose. so it goes: pump-->short hose-->T-fitting-->long hose to mt69 and on to the tank with the T fitting holding the ball valve fitting for drawing a vacuum.

Would that work for you?

*facepalm*

That's perfect actually, I can't believe I didn't think of that....I'm an engineer ffs....been spread thin though doing too many things and losing sight of the simple

 

[Red Bear]

I usually hook everything up open all the valves close the valves on the recovery tank.
turn on my vacuum pump, it vacs the entire extractor.
but what I want to know is can this vac through the terpinator vapor port hose through the Pistons in the g5 and actually vacuum the hose from the g5 recovery pump going to the vapor port on my recovery tank?
or do I need to vacuum the hose from the recovery pump to the vapor port separately or wait til it spits solvent to tighten connection and open vapor valve on tank to prevent atmosphere and water from entering the recovery tank

 

[BigJohnny]

I usually hook everything up open all the valves close the valves on the recovery tank.
turn on my vacuum pump, it vacs the entire extractor.
but what I want to know is can this vac through the terpinator vapor port hose through the Pistons in the g5 and actually vacuum the hose from the g5 recovery pump going to the vapor port on my recovery tank?
or do I need to vacuum the hose from the recovery pump to the vapor port separately or wait til it spits solvent to tighten connection and open vapor valve on tank to prevent atmosphere and water from entering the recovery tank

This was exactly my point/post.

No you cannot vaac THROUGH the recovery pump because of check valves. Therefore everything connected to the OUT side of the recovery pump is not getting vac'd.

Thus the suggestion for a t fitting and valve.

 

[Red Bear]

Thanks BigJohnny!

Thanks BigJohnny!

Didn't catch that the first time around now I understand
I didn't realize there was check valves I figured maybe the Pistons could work backwards or something like that.
I guess my method of leaving the vapor valve on the recovery tank closed turning on the recovery pump and waiting until it actually starts to spurt butane before I tighten the connection on the hose coming from the recovery on and opening the valve on the recovery tank which sucks because it's sketchy and it's venting to the atmosphere so I guess I need to figure out this T valve on the vapor recovery line from the pump to the tank so I can get all this atmosphere out of there thanks for bringing this question up I meant to ask this a couple months ago

 

[Chonkski]

I posted the link for the ball valve needed. It's not as complicated as this thread is making it.

C'mon now fellers

 

[icdog]

Pics help

 

[Chonkski]

When I use my phone or tablet, it only let's me post one picture a post for some reason so I'll just explain.

The picture posted is the 1/4" ball valve for the end of your hose. Just connect this side to your pump and the other end on the tank being closed of course, pull vac, and close off before disconnecting and reconnecting to your recovery pump outlet side.

This is the method to use whether you're using a heat exchanger or just a hose.

I posted the link for these above.