This is probably a silly question, but it is something I have wondered about. Is it necessary to purge the gas line when done welding or is it sufficient to just close the tank valve and let the gas in the line and the machine slowly leak out?
Thanks.
dirtmidget33
- dirtmidget33
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I was taught to
1.turn off tank
2. Purge lines
3. Back off regulator
Reason being is to relieve preasure on springs and diaphram , if it is diaphram type regulator lets the diaphram relax. Is it necessary cant say for sure but it supposed to increase life of regulator I continue to do it but very anal about tools and keeping shop clean. Job not done until mess from that job is cleaned up. Customer pays for clean up time all part of the job.
1.turn off tank
2. Purge lines
3. Back off regulator
Reason being is to relieve preasure on springs and diaphram , if it is diaphram type regulator lets the diaphram relax. Is it necessary cant say for sure but it supposed to increase life of regulator I continue to do it but very anal about tools and keeping shop clean. Job not done until mess from that job is cleaned up. Customer pays for clean up time all part of the job.
why use standard nozzles after gas lens where invented. Kinda of like starting fires by rubbing sticks together.
- MinnesotaDave
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Weldmonger
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Joined:Sun Oct 27, 2013 10:57 pm
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Location:Big Lake/Monticello MN, U.S.A.
+1dirtmidget33 wrote:I was taught to
1.turn off tank
2. Purge lines
3. Back off regulator
Reason being is to relieve preasure on springs and diaphram , if it is diaphram type regulator lets the diaphram relax. Is it necessary cant say for sure but it supposed to increase life of regulator I continue to do it but very anal about tools and keeping shop clean. Job not done until mess from that job is cleaned up. Customer pays for clean up time all part of the job.
same here on all counts
Dave J.
Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~
Syncro 350
Invertec v250-s
Thermal Arc 161 and 300
MM210
Dialarc
Tried being normal once, didn't take....I think it was a Tuesday.
Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~
Syncro 350
Invertec v250-s
Thermal Arc 161 and 300
MM210
Dialarc
Tried being normal once, didn't take....I think it was a Tuesday.
450dualsport
- 450dualsport
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Guide
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Joined:Wed Oct 30, 2013 10:46 am
I have always purged the line just because it seems like the right thing to do. I just wasn't sure how necessary it is....
It is easy on the Mig welder, I just disengage the drive rollers and hold the trigger down until the regulator and line purges.
On the Tig welder, I understand that you are not really supposed to let the HF run for extended periods, so I close the tank valve and initiate the arc for a second and let the post flow purge the flow meter and line. Does anyone have a valve installed for purging?
It is easy on the Mig welder, I just disengage the drive rollers and hold the trigger down until the regulator and line purges.
On the Tig welder, I understand that you are not really supposed to let the HF run for extended periods, so I close the tank valve and initiate the arc for a second and let the post flow purge the flow meter and line. Does anyone have a valve installed for purging?
This is a nice feature of at least some Everlast TIG machines - a front-panel gas purge button. It'll run for 10-15 seconds if you don't tap it again to shutoff. I use it to prime the line during setup and bleed it when done. (210 EXT model)450dualsport wrote:Does anyone have a valve installed for purging?
Conversely, the machine's too smart to use the post-flow technique. If it doesn't see that an arc was established, it won't do post-flow.
Cheers,
Richard
Grinding discs... still my #1 consumable!