Complete Leak Check, CO2 pressurized system - Page 4
Planted Tank Forums
Your Tanks Image Hosting *Tank Tracker * Plant Profiles Fish Profiles Planted Tank Guide Photo Gallery Articles

Go Back   The Planted Tank Forum > Specific Aspects of a Planted Tank > Equipment


Reply
 
Thread Tools Display Modes
Old 03-02-2013, 12:53 AM   #46
Mathman
Planted Tank Obsessed
 
Mathman's Avatar
 
PTrader: (0/0%)
Join Date: Apr 2009
Location: Los Angeles, CA
Posts: 331
Default

Complete Leak Check, CO2 pressurized system


Quote:
Originally Posted by kevmo911 View Post
Just curious - have you tried testing with soapy water yet?
Since there was no leak on the first stage...can't I just test connections running by opening the co2 tank and have the LP gauge at a working pressure of 40psi? That way I can do a soapy water test?
Mathman is online now   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 03-02-2013, 01:16 AM   #47
Bettatail
Planted Tank Guru
 
Bettatail's Avatar
 
PTrader: (82/98%)
Join Date: Feb 2009
Location: San Francisco
Posts: 2,284
Default

Quote:
Originally Posted by Mathman View Post
So just remove the LP and relief valve and redo the Teflon? Is it possible that the leak is also from the post body?



I have a 1/4"-1/8" bushing....1/8" nipple...to the solenoid which is closed.

My LP gauge read close to 80psi (look at the previous post) and dropped to (40 psi). What is an acceptable drop? From 80psi-?
didn't see you have a postbody, I though it was the regulator only.
I think the slow leak is from the postbody.

please take them apart and re-seal, and a separate test on the regulator only(seal the regulator outlet with 1/4" npt plug, and test the LP side), so you can be sure the regulator is ok.

If you only have the teflon tape to seal, make sure the tape wrap around the threads properly, and press in before you connect the fittings.

there is a small secret for teflon tape method, wet the threads with only a little bit of mineral oil, the tape is better against tear when assemble, and mineral oil will provide better seal, (surface tension to stop co2 push through at micro pore size gaps)
Bettatail is online now   Reply With Quote Quick reply to this message
Old 03-02-2013, 01:19 AM   #48
Mathman
Planted Tank Obsessed
 
Mathman's Avatar
 
PTrader: (0/0%)
Join Date: Apr 2009
Location: Los Angeles, CA
Posts: 331
Default Complete Leak Check, CO2 pressurized system

I like that and ill try it. Ill plug the outlet to remove other variables...I will apply a drop of mineral oil prior to adding the yellow Teflo...just curious isn't the mineral going to make it slippery?
Mathman is online now   Reply With Quote Quick reply to this message
Old 03-02-2013, 01:29 AM   #49
oldpunk78
ಠ_ಠ
 
oldpunk78's Avatar
 
PTrader: (104/100%)
Join Date: Nov 2008
Location: 96007
Posts: 5,049
Default

Quote:
Originally Posted by Mathman View Post
just curious isn't the mineral going to make it slippery?
That's the point
oldpunk78 is online now   Reply With Quote Quick reply to this message
Old 03-02-2013, 01:32 AM   #50
Mathman
Planted Tank Obsessed
 
Mathman's Avatar
 
PTrader: (0/0%)
Join Date: Apr 2009
Location: Los Angeles, CA
Posts: 331
Default Complete Leak Check, CO2 pressurized system

Do you find it necessary for me to redo the Teflon on the LP and relief valve Or should I just plug the outlet and retest?
Mathman is online now   Reply With Quote Quick reply to this message
Old 03-02-2013, 02:53 AM   #51
oldpunk78
ಠ_ಠ
 
oldpunk78's Avatar
 
PTrader: (104/100%)
Join Date: Nov 2008
Location: 96007
Posts: 5,049
Default

I would see if I could find any bubbles in any of the joints and then proceed. I usually just plug the reg and test it alone first though.
oldpunk78 is online now   Reply With Quote Quick reply to this message
Old 03-02-2013, 03:16 AM   #52
Mathman
Planted Tank Obsessed
 
Mathman's Avatar
 
PTrader: (0/0%)
Join Date: Apr 2009
Location: Los Angeles, CA
Posts: 331
Default Complete Leak Check, CO2 pressurized system

Don't have any 1/4" MNPT plug ..trip to HD
Mathman is online now   Reply With Quote Quick reply to this message
Old 03-02-2013, 03:17 AM   #53
Bettatail
Planted Tank Guru
 
Bettatail's Avatar
 
PTrader: (82/98%)
Join Date: Feb 2009
Location: San Francisco
Posts: 2,284
Default

Quote:
Originally Posted by Mathman View Post
Do you find it necessary for me to redo the Teflon on the LP and relief valve Or should I just plug the outlet and retest?
test first.


Quote:
Originally Posted by Mathman View Post
I like that and ill try it. Ill plug the outlet to remove other variables...I will apply a drop of mineral oil prior to adding the yellow Teflo...just curious isn't the mineral going to make it slippery?
wrap the tape on male threads and press in, then wet with mineral oil, ONLY A LITTLE BIT, enough to cover the metal with thin layer of oil, use Q-tip.
Bettatail is online now   Reply With Quote Quick reply to this message
Old 03-02-2013, 04:52 AM   #54
Mathman
Planted Tank Obsessed
 
Mathman's Avatar
 
PTrader: (0/0%)
Join Date: Apr 2009
Location: Los Angeles, CA
Posts: 331
Default Complete Leak Check, CO2 pressurized system

Regulator outlet is now plugged. What is the target pressure on the LPG to test for leakage?
Mathman is online now   Reply With Quote Quick reply to this message
Old 03-02-2013, 09:50 AM   #55
Darkblade48
Moderator
 
Darkblade48's Avatar
 
PTrader: (3/100%)
Join Date: Jan 2008
Location: Toronto
Posts: 8,754
Default

Quote:
Originally Posted by Mathman View Post
Regulator outlet is now plugged. What is the target pressure on the LPG to test for leakage?
No real target; just set it to some arbitrary value (say 30-40 PSI), make a note of it, and then wait. Make sure gas is not flowing from the first stage to the second stage regulation.

If it drops more than 10% or so, then check your plug first to ensure it is not leaking. If you are absolutely sure that it is not leaking, and the pressure is still dropping, then your regulator has a problem.
__________________
Anthony

A Primer to Pressurized CO2 and A Primer to Planted Tanks
Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
Darkblade48 is offline   Reply With Quote Quick reply to this message
Old 03-02-2013, 07:49 PM   #56
Mathman
Planted Tank Obsessed
 
Mathman's Avatar
 
PTrader: (0/0%)
Join Date: Apr 2009
Location: Los Angeles, CA
Posts: 331
Default Complete Leak Check, CO2 pressurized system

Quote:
Originally Posted by Darkblade48 View Post
No real target; just set it to some arbitrary value (say 30-40 PSI), make a note of it, and then wait. Make sure gas is not flowing from the first stage to the second stage regulation.

If it drops more than 10% or so, then check your plug first to ensure it is not leaking. If you are absolutely sure that it is not leaking, and the pressure is still dropping, then your regulator has a problem.
Thanks for explaining this Anthony...it makes a lot more sense now.
Mathman is online now   Reply With Quote Quick reply to this message
Old 03-03-2013, 04:08 PM   #57
Mathman
Planted Tank Obsessed
 
Mathman's Avatar
 
PTrader: (0/0%)
Join Date: Apr 2009
Location: Los Angeles, CA
Posts: 331
Default Complete Leak Check, CO2 pressurized system

Thanks for the last PPM bettatail...

Here's what I just finished doing...I removed the relief valve and plugged the port using a 1/4" NPT plug...the same was done for the outlet port.



I connected the regulator to the co2 tank, opened the co2 release handle and now the HP gauge reads "800 psi" (I decided not to wait 6 hours to see if there was a pressure decrease on the HP gauge as I had already done this before and there was no change whatsoever.) So, I closed the co2 tank release handle and opened the regulator valve to charged the LPG to 100 psi, then closed the regulator valve (counter-clockwise) completely. Finally, I removed the regulator from the co2 tank. I waited 10 minutes and took a picture as shown below to record the reading on my LPG (95 psi).




It has been ~11 minutes and the new reading is 90 psi.



Finally, after a total of 6.5 hours the new reading is ~42psi.



At this point, I'm almost certain that there's an issue at the second stage of the regulator.

I will do a soapy water test on both plugs and the LPG...I even have an extra LPG that I can use to narrow the locations of a leak.

Let me know your thoughts.

BTW: I am only doing about 2-2.5 turns of yellow Teflon on the male threads...should I be doing more?
Mathman is online now   Reply With Quote Quick reply to this message
Old 03-03-2013, 04:29 PM   #58
kevmo911
Planted Tank Guru
 
kevmo911's Avatar
 
PTrader: (32/100%)
Join Date: Sep 2010
Location: Greensboro, NC
Posts: 3,895
Default

I'd retape the LPG and plugs with slightly more tape (though 2-2.5 wraps with yellow should generally be fine), make sure everything is nice and tight, and try one more time. Since the alternative is a huge hassle, I'd desperately hope it was a simple leak from a port.
kevmo911 is offline   Reply With Quote Quick reply to this message
Old 03-03-2013, 04:36 PM   #59
Mathman
Planted Tank Obsessed
 
Mathman's Avatar
 
PTrader: (0/0%)
Join Date: Apr 2009
Location: Los Angeles, CA
Posts: 331
Default Complete Leak Check, CO2 pressurized system

Thanks....I just tried the soapy water test and its very difficult to notice any leaks ( the leak is not fast enough to cause any visible bubbles). I will remove the LPG and both plugs...redo the Connections with more Teflon. I hope that does it.
Mathman is online now   Reply With Quote Quick reply to this message
Old 03-03-2013, 04:52 PM   #60
oldpunk78
ಠ_ಠ
 
oldpunk78's Avatar
 
PTrader: (104/100%)
Join Date: Nov 2008
Location: 96007
Posts: 5,049
Default

Make sure all of your connections are tight. No one really mentions it, but you need to get those things tight. At least tight enough that worrying about messing up the fittings. I'm not really sure how else to explain this. Basicly, as tight as you can get the connections without messing anything up...
oldpunk78 is online now   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 09:17 PM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright Planted Tank LLC 2012