phantom gtt hissing when outer flame is fired

[cody3278]

hi i have a month old phantom gtt with a rock it foot peddle (non electric). evry things been fine for the last month but now when i go to kick on the outer fire it hissses hard and is only like half lit. then if i rock it off and back on its fine? and i can cut it back on and of again and its fine but if i go back to the center flame and work a bit then go back it hises again. i run my oxy on 30ish and 10 on gas. my buddy said its staic pressure releasiing but that doesent make sense it does it every time? thanks again

[theelementofsand]

I hope this info helps, and Welcome to The Melting Pot


http://www.mountainglass.com/Rock-It-Foot-Pedal.html

* The Rock-It has a maintain switch. The maintain switch will keep the outer fire on until switch is depressed a second time allowing freedom of movement.

[hashmasta-kut]

i dont think thats it. whats going in is he has the second stage set up just raging, and they dont like that to light up smoothly. you need to back it off a bit if you want it to light up nice the first time.

[2wheeler]

Yep that's what mine does exactly and I'm using a rockit pedal as well... I kick mine in on, off, on almost everytime.. I'm sure its because I keep both the mirage fire and mag fire raging...
Kbinkster? Is this hard on the torch or is it just noise?

[hashmasta-kut]

its not cuz of the pedal type tho.

[kbinkster]

i dont think thats it. whats going in is he has the second stage set up just raging, and they dont like that to light up smoothly. you need to back it off a bit if you want it to light up nice the first time.

That's what I would try - back off a little bit on the oxygen. Try backing down on the blue valve, first, and see if that helps. You might want to clean the ports and sweep the face, too, just in case.

[ahreno]

Mine does this too. About four months old or so... I think its a homemade foot pedal that I have (electric foot pedal). I thought I was going crazy. If you go with a heavy fluffy propane flame on your outer ring, does one side extend longer than the other?

[bildo]

Man, I heard a suggestion that nodice put up here about lengthening your outer oxy hose. The oxygen is getting there before the the propane, so if you make it longer from the solenoid to the torch the oxy may come on slower, killing out the hiss. I bought the hose but have yet to plug it on, I just ease off the oxy and crank it back up. Also I feel like the the problem is worse when my green oxy is up high.

[chillrelaxglass]

Easy to get it hissing on tanked oxy.

[hashmasta-kut]

do you want to explain how that can be a factor, cuz i dont think it is.

[chillrelaxglass]

its easy to make a gtt scream with tanked oxy bc theres more presser than an oxycon. or atleast my oxycon. On my oxycon my lynx makes 0 noise. On tanked oxy I can make it hiss loud. An yea im only using a lynx but same thing happens when we run my boys mirage on tanked oxy instead of oxycon.

[hashmasta-kut]

ok i can see your point i guess, but its not because its in a tank, its because oxycons are too weak :D

i have only used liquid or tanked, so i had no thought of weak oxycon pressure.

and we arent talking about that hiss really, its a different kind of hiss that happens when some jets dont light up cuz the pressure is so high when you engage your second stage. i think you are just saying that when you have lots of oxy you can turn it up high enough its really loud..

[chillrelaxglass]

Ah word. Yea ive always wanted to get me some liquid oxy. I don't think oxycons are weak (I know its not a oxycon convo) but with tanked oxy it seems more easy to over run torches (gtt) in particular.

[Lefty]

This used to happen w my phantom when i was using oxidizing fires,never w the delta tho..Just rock the pedal into the on position slowly and you'll be able to see the propane light first

[ahreno]

i dont think that adding extra oxy hose would work. It might work the first time you use it when the line isn't pressurized but after that the line should have pressure and it shouldn't matter if it's 100' long and the propane is 4' long. i might be wrong on that but thats how it works in my brain.

[bildo]

Ill give it a try. I def see your point. Once its pressurized.........

[bildo]

........... it wont remain pressurized because the valves on the nob are open, so it would empty after the valve each time. If it doesnt work I believe it will be because the o2 pressure is so much higher than the propane. I hope it works, I am sick of the hiss, I want to rage unimpeded.

[ahreno]

good point about the valve being open. Totally forgot about that.

[STROKER]

Ah word. Yea ive always wanted to get me some liquid oxy. I don't think oxycons are weak (I know its not a oxycon convo) but with tanked oxy it seems more easy to over run torches (gtt) in particular.
This shows how inexperienced you are.
You are not gonna overrun a gtt. Its funny to hear that when I have friends running pressures at 70/15 or higher.
Yes liquid or high pressure tanks do make oxycons look weak. Thats a fact by comparison.

[BORO]

lox is really no different than tanked . Most lox tanks will vent gas at about 300 psi . If you are working all day the tank may not be much above 100 psi . I have seen my tank at about 120 psi delivered. You would think it would be high pressure like a tank of gas , but it is not . ( not that you need 100+ psi for your torch ) A few big torches running together , and the pressure can drop past your regulator setting , then you have to turn on the pressure builder .( or if the tank is almost kicked , then the pressure builder may give you that last little bit .)

One of the things you may not know if you have not seen a oxygen dewar .

I agree , orders to fill = stress . If you make what ever you want ,then go sell it , no stress . If people put in orders , they want it yesterday , and it has to be up to the standards they expect . much more stressful .

[kbinkster]

I didn't tell anyone any pressures to run.
No, you said:


And your friends that are running 70 psi are fucking crazy. Don't see any need.

Just because you don't see a need for something doesn't mean that there isn't a need for someone else.

"Wow! 70 psi? I've never heard of such a thing. What's the advantage of that?" <-- would have been a better way to go, and could have ended up with you learning something.

[nodice]

Not sure if the problem has been solved because I only read the first post, but my guess would be that you're having the problem all of a sudden because you changed gas pressure and the oxy is coming out of the Ports before the propane. Running higher propane pressure, lower oxy pressure, or changing the length of the gas lines between the pedal and torch will probably solve the problem. You'd want the propane hoses to be shorter than the oxy.....

[nodice]

Ok, I read it. Hey Boro, the pressure builder on a liquid tank has a regulator on it. If you set the regulator to the pressure you want, and leave the pressure builder open, you should be pretty set while working.

I like running fairly low oxy pressure unless I need more flow. It makes fine adjustment of the center fire a lot easier than with higher pressure. And for the record, it's 6:42

[misled youth]

i used to run my cc+ at 80 for many tasks

[Mr. Larry]

I run my Zenit 50 at 50-80psi for a lot of tasks too.