996TURBO
Active Member
- Posts
- 579
- Location
- Paris, FRANCE
I'm glad to read that i'm not the only one going back to yellow seal (non Dutch).
E.A.S. in freezing weather
- Thread starter dogsbody
- Start date
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- Posts
- 58,170
- Location
- Preston Lancs.
I think our friend Godwin is going to have a re-think about his seal. It does seem to fail rather to easily. I replaced mine with an yellow one i had and the EAS was transformed. I must say though it is totally pointless fitting a new seal to an old cylinder. Seal and cylinder as a pair always.
996TURBO
Active Member
- Posts
- 579
- Location
- Paris, FRANCE
I spoke with him about my comparison tests.
In fact what i pointed out was the lack of the compression the grey gives but what is unbelievable is how heavy duty Goswin's seal is.
I had one that rubbed hard core a black liner (Goswin's liner). I've never seen a seal that destroys liner.
I tested all the seals and liners that are on the market.
Winner is yellow seal and stainless steel liner from RoverRenovation.
That combo gives you a even better result than a new compressor.
Goswin - LandRoverwinkel.nl
New Member
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- 30
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- Netherlands
Hi guys,
I just noticed this post and the concern about the seals...
First let me explain some seal-history
- The standard yellow seal (and every yellow replica of it) is made of Teflon.
- the grey seals are made of Ecoflon2. Ecoflon is a certain mix of Glassfibre and Teflon
Both materials are self-lubricating and both materials are product without a memory. This last line might sound strange, but it means that if you bent the seal inside (or outside), it will not go into it's original form again. It has no memory.
The big difference between Teflon and Ecoflon is the toughness. Ecoflon is superior to Teflon. It is almost unwearable and it can take temperatures up to 260 degrees Celcius.
The strength of the Ecoflon is also the negative part of the story. When you use the grey seal in a standard alloy liner, it will wear out the liner because alloy is too soft. When I noticed this, we anodised the alloy liners and we created the next generation liners (the Black ones).
Okay, so far the introduction of the material and the reason why we developed the GREY SEALS icm the BLACK liners.
By the way, I first developed them for my own RR P38. I ran into the well know EAS faults and this was my cure.
All right back to the problems I have read here.... There is always a reason why a seal 'collapses' (sorry for my English). And it does not matter if you use yellow of grey seals, both will collapse.
In a lot of cases it is the valve block that causes the compressor to run out of compression pretty quickly (this can be a broken diaphragm or leaky valves). Also the valves inside the EAS Compressor should be checked and when you do this, please also replace both o-rings inside the compressor... this gives you the best end-result.
Further, A QUICK SOLUTION for compressors that ran out of compression.... Since Teflon and Ecoflon are products without memory, you can bent the seal back to the outside (just open the pump, lift the liner, bent the seals gently to the outside and place the liner back on top.... This will give your pump the compression back as it should. This only works when the seal is not damaged ofcourse....
Last nut not least: we can produce seals in any material / form / size, so if you think that anything can be improved in the current design, please let me know. I will absolutely consider and test it!
We are currently working on even stronger liners.
Regards from the Netherlands,
Goswin de Rouw
PS: again sorry for my English... I hope I haven't made any big mistakes in my text.
I just noticed this post and the concern about the seals...
First let me explain some seal-history
- The standard yellow seal (and every yellow replica of it) is made of Teflon.
- the grey seals are made of Ecoflon2. Ecoflon is a certain mix of Glassfibre and Teflon
Both materials are self-lubricating and both materials are product without a memory. This last line might sound strange, but it means that if you bent the seal inside (or outside), it will not go into it's original form again. It has no memory.
The big difference between Teflon and Ecoflon is the toughness. Ecoflon is superior to Teflon. It is almost unwearable and it can take temperatures up to 260 degrees Celcius.
The strength of the Ecoflon is also the negative part of the story. When you use the grey seal in a standard alloy liner, it will wear out the liner because alloy is too soft. When I noticed this, we anodised the alloy liners and we created the next generation liners (the Black ones).
Okay, so far the introduction of the material and the reason why we developed the GREY SEALS icm the BLACK liners.
By the way, I first developed them for my own RR P38. I ran into the well know EAS faults and this was my cure.
All right back to the problems I have read here.... There is always a reason why a seal 'collapses' (sorry for my English). And it does not matter if you use yellow of grey seals, both will collapse.
In a lot of cases it is the valve block that causes the compressor to run out of compression pretty quickly (this can be a broken diaphragm or leaky valves). Also the valves inside the EAS Compressor should be checked and when you do this, please also replace both o-rings inside the compressor... this gives you the best end-result.
Further, A QUICK SOLUTION for compressors that ran out of compression.... Since Teflon and Ecoflon are products without memory, you can bent the seal back to the outside (just open the pump, lift the liner, bent the seals gently to the outside and place the liner back on top.... This will give your pump the compression back as it should. This only works when the seal is not damaged ofcourse....
Last nut not least: we can produce seals in any material / form / size, so if you think that anything can be improved in the current design, please let me know. I will absolutely consider and test it!
We are currently working on even stronger liners.
Regards from the Netherlands,
Goswin de Rouw
PS: again sorry for my English... I hope I haven't made any big mistakes in my text.
- Posts
- 58,170
- Location
- Preston Lancs.
Hi guys,
I just noticed this post and the concern about the seals...
First let me explain some seal-history
- The standard yellow seal (and every yellow replica of it) is made of Teflon.
- the grey seals are made of Ecoflon2. Ecoflon is a certain mix of Glassfibre and Teflon
Both materials are self-lubricating and both materials are product without a memory. This last line might sound strange, but it means that if you bent the seal inside (or outside), it will not go into it's original form again. It has no memory.
The big difference between Teflon and Ecoflon is the toughness. Ecoflon is superior to Teflon. It is almost unwearable and it can take temperatures up to 260 degrees Celcius.
The strength of the Ecoflon is also the negative part of the story. When you use the grey seal in a standard alloy liner, it will wear out the liner because alloy is too soft. When I noticed this, we anodised the alloy liners and we created the next generation liners (the Black ones).
Okay, so far the introduction of the material and the reason why we developed the GREY SEALS icm the BLACK liners.
By the way, I first developed them for my own RR P38. I ran into the well know EAS faults and this was my cure.
All right back to the problems I have read here.... There is always a reason why a seal 'collapses' (sorry for my English). And it does not matter if you use yellow of grey seals, both will collapse.
In a lot of cases it is the valve block that causes the compressor to run out of compression pretty quickly (this can be a broken diaphragm or leaky valves). Also the valves inside the EAS Compressor should be checked and when you do this, please also replace both o-rings inside the compressor... this gives you the best end-result.
Further, A QUICK SOLUTION for compressors that ran out of compression.... Since Teflon and Ecoflon are products without memory, you can bent the seal back to the outside (just open the pump, lift the liner, bent the seals gently to the outside and place the liner back on top.... This will give your pump the compression back as it should. This only works when the seal is not damaged ofcourse....
Last nut not least: we can produce seals in any material / form / size, so if you think that anything can be improved in the current design, please let me know. I will absolutely consider and test it!
We are currently working on even stronger liners.
Regards from the Netherlands,
Goswin de Rouw
PS: again sorry for my English... I hope I haven't made any big mistakes in my text.
I have already said this. That the seal fails maybe due to the compressor running light. But my compressor is not running light and your seal failed in it. I fitted your seal and black cylinder the seal failed. It was expanded and failed again a couple of weeks later. Maybe it should have memory. I fitted the standard seal to your cylinder and have had no problems since. The standard seal has some flexibility when it warms it is sealed against pressure. Once your seal shrinks it does not expand against pressure when warm because it is too stiff. This possibly because the piston reciprocates and also tips in the bore. If when the seal is hot the piston is tipped when the compressor comes to rest your seal being stiff is pushed in at one side and loses contact with the cylinder when compressoer restarts. The standard seal being more flexible does not do this.
996TURBO
Active Member
- Posts
- 579
- Location
- Paris, FRANCE
I'm not talking about collapsed seals during use but about lack of compression on first mount.
I sell rebuild compressors kits : piston, seal, liner
If i can't get a good compression even out of the compressor how this will give good results inside it??
I sell rebuild compressors kits : piston, seal, liner
If i can't get a good compression even out of the compressor how this will give good results inside it??
I've taken no chances and thanks to the nice man at Island, and a wadge of cash, I now have a new compressor. I'm back to the way things were before I started tinkering and how the dutch cap was when I first fitted it.
However, the original compressor lasted ten years so I hope that this will be the end of this saga for this decade.
However, the original compressor lasted ten years so I hope that this will be the end of this saga for this decade.
