What am I doing wrong??? Re:viton/ptfe 150 mesh screen gaskets

M

moffatmafia

New member

• Feb 3, 2018

• #1

Every 10th run or so on my mk4c after about a 5 minute soak of the material when I open the dump valve the screen rips and the collection pot fills with the material. Terppextrators said it could be void space in the column but also that they have never seen this happen to a gasket like that.

 

P

prune

Active member

Veteran

• Feb 4, 2018

• #2

over-packing or over pressure, probably the second. do you have a gauge on your column?

 

N

nakadashi

Member

• Feb 4, 2018

• #3

Open the dump valve slowly to let the pressure equalize a bit between column and collection pot.

 

killa12345

Active member

• Feb 4, 2018

• #4

Personally i like to leave a piece of paper crumbled up in the tubes before i place my filter paper...This gives me like a 1" gap after im done packing. i remove the paper before my runs, so there is a gap between the filter paper and the viton screened gaskets. Its allow for the material expansion or just give a little space for the material to move on the intial pressure from adding gas.

Ive seen this before

 

M

moffatmafia

New member

• Feb 4, 2018

• #5

Waiting on more screens at the moment will be back with results....

 

M

moffatmafia

New member

• Feb 11, 2018

• #6

This has been crazy furstrating and is still happening, no I don't have a a gauge on the column. It's like there is an airbubble trapped somewhere and it pops while it's equalizing. Maybe just don't open the dump vavle all the way?

 

MJPassion

Observer

ICMag Donor

Veteran

• Feb 11, 2018

• #7

It sounds like your opening the ball valve too quickly after the soak.
A 1 to 2 minute soak causes pressure in my system to reach about 30-40psi while the collection pot is sitting at a near perfect vac for my elevation (7K ft).

I’ve not run my system enough yet to experience anything even close. I have noticed, however, that the viton screen gasket get damaged more & more each time I tighten the clamps down. Not the seal ridge but where the gasket is actually surrounding the screen (inside the ridge).

I’m wondering what the life expectancy of these seals are? Using High pressure clamps versus standard pressure clamps?

 

M

moffatmafia

New member

• Feb 11, 2018

• #8

I usually do about 4 and half minute soak. So that could definitely be the issue. Was considering not soaking and just leaving the dump valve open while spraying gas more like passive recovery. How would that affect yield tho?? I'd rather lose a little then keep blowing out screens tho

 

J

justintime420

Active member

• Feb 11, 2018

• #9

Dumb question but sometimes over looked are you opening the number 2 or liquid line to release pressure from the top before opening the dump valve to prevent such an aggressive dump?

 

G

gumby420

Member

• Feb 12, 2018

• #10

only time I've had that happen were with really really shitty screen gasket from OSS. luckily I have like 3 more screens under my filter stack so it doesn't really matter. were they Terpp gaskets? Or from a 3rd party? If they are Terpp id say opening the ball valve to quick, if 3rd party it could be the quality.

 

Gray Wolf

A Posse ad Esse. From Possibility to realization.

Mentor

ICMag Donor

Veteran

• Feb 12, 2018

• #11

Open the dump valve slowly or keep your columns colder. You can also vent the pressure using the vent, before opening the dump valve.

 

M

moffatmafia

New member

• Feb 14, 2018

• #12

justintime420 said:

Dumb question but sometimes over looked are you opening the number 2 or liquid line to release pressure from the top before opening the dump valve to prevent such an aggressive dump?

Click to expand...

No I am not, It won't draw the BHO through that line , just pressure?? I like fell into a situation and I have a very basic knowledge , I went to the class at Terpp, and they were helpful. But didn't have the answers I needed.

 

M

moffatmafia

New member

• Feb 14, 2018

• #13

Gray Wolf said:

Open the dump valve slowly or keep your columns colder. You can also vent the pressure using the vent, before opening the dump valve.

Click to expand...

!!!!! Thank you. Man you guys are great I was wary of posting such a basic question but you guys are awesome !!! Thanks again!!!

 

M

moffatmafia

New member

• Feb 14, 2018

• #14

gumby420 said:

only time I've had that happen were with really really shitty screen gasket from OSS. luckily I have like 3 more screens under my filter stack so it doesn't really matter. were they Terpp gaskets? Or from a 3rd party? If they are Terpp id say opening the ball valve to quick, if 3rd party it could be the quality.

Click to expand...

Word, so I've tried a few different places, Terpp, OSS and best valve you vac. I just don't have 125$ for the ptfe 150 from Terpp ,

 

G

gumby420

Member

• Feb 16, 2018

• #15

moffatmafia said:

Word, so I've tried a few different places, Terpp, OSS and best valve you vac. I just don't have 125$ for the ptfe 150 from Terpp ,

Click to expand...

as far as equipment quality its for me its been ...terp>xtractordepot>best value> OSS. OSS has by far had the shittiest products. Literally every screen gasket I got was either unusable or leaked.