| Author | Message | ||
     Patrick Lockyer. Grand Master Username: pat_lockyer Post Number: 2077 Registered: 9-2004 |
Wow, some fool has recommended the use of compressed air instead of nitrogen to charge the spheres! | ||
| David Gore Moderator Username: david_gore Post Number: 3175 Registered: 4-2003 |
Where and when please - on this forum or elsewhere? | ||
| Patrick Lockyer. Grand Master Username: pat_lockyer Post Number: 2080 Registered: 9-2004 |
From a e-mail asking for clarification from a statement made on some sort of forum! | ||
| Vladimir Ivanovich Kirillov Grand Master Username: soviet Post Number: 1322 Registered: 2-2013 |
Actually, air would probably work for a short time, oh yes it is possible. I had a mad mate years ago who ran his Holden Ute's automatic transmission on water and it worked for a short time too and then....it stopped working. Hmmn I wonder why? | ||
| David Gore Moderator Username: david_gore Post Number: 3181 Registered: 4-2003 |
Any DRY gas that does not degrade the diaphragm would probably work. As I see it, Nitrogen is inert, low-cost, widely available and completely dry with no adverse effects on the diaphragm other than the inevitable loss of pressure due to diffusion across the diaphragm into the brake fluid. In all cases, the rate of diffusion will be determined by the size of the gas molecules. . | ||
| Paul Yorke Grand Master Username: paul_yorke Post Number: 2151 Registered: 06-2006 |
The important thing about nitrogen is that it does not really change volume with temperature. It's also inert. | ||
| Brian Vogel Grand Master Username: guyslp Post Number: 2988 Registered: 06-2009 |
And, indeed, does. Air is 78% nitrogen, and sources for dessicated air are widespread, almost any store that sells paintball guns can supply it. I haven't used it myself, but logic dictates that it would work, and I seem to recall that at least one person I know has used it, but at the moment I cannot be certain. Given the thickness of the diaphragms, the rate of migration across one is likely far less than the slow (very slow, if one is lucky) leak out of the less than stellar OEM valve on the accumulators. Were I rebuilding any in the future I would definitely use the substitute valve from Flying Spares rather than the original ball bearing setup. Brian | ||
| Trevor Hodgekinson Experienced User Username: wm20 Post Number: 126 Registered: 11-2006 |
Please Paul. All gasses expand when heated unless they undergo a phase change PxV/T is constant for all gasses. |
