HVAC or Vacuum Aspirator Station? , Hive Chemicals & Equipment
 
    Dr_Lxve 01-21-03 09:10
      <a href="https://www.the-hive.ws/forum/showflat.pl?Number=400208&page=46&view=&sort=5&Search=&vc=&new=&start=0&xrated=y&&URLForums=" title="Click here to show this downrated post">HVAC or Vacuum Aspirator Station?</a> <br> <i title="This post has been downrated by the moderators">(Rated as: redundant)</i> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=400208&Number=400208&page=46&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post400223"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> <font color="#FF0033">Rhodium</font><br> <i>(<span title="The user's title at the time of posting">Chief Bee</span>)</i><br> <span title="Posting date">01-21-03 10:29</span><br> <span title="Link to this post by using the markup [400223]">No 400223</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">Either or?</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=400223&Number=400223&page=46&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> Neither is the universal solution. See <span title="Jump to this post"><a href="http://chemistry.mdma.ch/hiveboard/DUMMY">Post 398298</a> <i>(Rhodium: "The combination is perfect", Newbee Forum)</i></span> </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post400227"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> spectralmagic<br> <i>(<span title="The user's title at the time of posting">A Different Title</span>)</i><br> <span title="Posting date">01-21-03 10:46</span><br> <span title="Link to this post by using the markup [400227]">No 400227</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">Water-aspirator works for me...</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=400227&Number=400227&page=46&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> Being a cheap bastard, I've only ever used a water aspirator (water is fairly plentiful in this city, and free in this building)...  all-glass model with built-in backflow preventer (which works well enough that I've never sucked water into the erlenmeyer flask setup to catch such events).  Just last night it was pulling a vacuum strong enough to distill our favourite 2-alkene at 118C (very steady vacuum as well - I guess I have a good water supply)... what is that, about 9-10 torr/mmHg?  And yes, the water here is icy cold out of the faucet... <br> <span title="The signature"><hr>Add your thread to the rich tapestry of conspiracy...<br>... and wave hello at the satellites!<br></span> </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post400238"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> Organikum<br> <i>(<span title="The user's title at the time of posting">Hive Addict</span>)</i><br> <span title="Posting date">01-21-03 12:11</span><br> <span title="Link to this post by using the markup [400238]">No 400238</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">A aspirator for most needs</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=400238&Number=400238&page=46&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> but of course Rhodium is right, the combination of an aspirator connected to the outlet of a HVAV pump is the killer application. <br><br>A very astonishing and rarely known fact is that a well buildt aspirator can pull <b>more</b> vacuum as widely assumed. The steampressure of water does <b>not</b> limit the vacuum that can be reached. The limitation is in the maximal velocity which is mostly determined by friction. <br>Old differences like UF vs. Eleusis where this started I believe and many threads here may be rated new taking this in regard.<br><br>Yes all books tell so, at least all chemical ones. Have a look in physics and engineering. They know more.<br><br>ORG <br> <span title="The signature"><hr><center><font color="blue"><b><span title="This post does not exist">Post 399486 (not existing)</span></b></font color="blue"></center></span> </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> <td align="left" valign="top" class="text_bg"> <img src="../forum/images/left_top.gif" border="0" height="12" width="9"></td> <td colspan="7"><a name="Post400285"></a><a name="last"></a></a> </td> <td align="right" valign="top"><img src="../forum/images/right_top.gif" border="0" height="12" width="9"></td> </tr> <tr class="text_bg"> <td rowspan="2"> </td> <td rowspan="2"> </td> <td valign="top" align="center" rowspan="2"> PolytheneSam<br> <i>(<span title="The user's title at the time of posting">Master Searcher</span>)</i><br> <span title="Posting date">01-21-03 15:45</span><br> <span title="Link to this post by using the markup [400285]">No 400285</span><br> </td> <td rowspan="2">  </td> <td rowspan="2" width="1" class="vert_ruler"> <img src="../forum/images/hr.gif" border="0" width="1" height="1"> </td> <td rowspan="2">  </td> <td class="text_bg" align="left" valign="top"> <b title="The subject of this post">HVAC usually stands for heating, ventilation...</b> </td> <td class="text_bg" align="right" valign="top">  <a href="https://www.the-hive.ws/forum/favorites.pl?Cat=&option=add&number=400285&Number=400285&page=46&view=&sort=5&part=&vc=&new=&backto=showflat" title="Add this post to your bookmark list in your Private Area">Bookmark</a>  </td> <td> </td> </tr> <tr class="text_bg"> <td colspan="2" valign="top" align="left"> <br> HVAC usually stands for heating, ventilation and air conditioning.  The stores often sell oil type vacuum pumps, too. <br> <span title="The signature"><hr> <a href="http://www.geocities.com/dritte123/PSPF.html" target="_blank" title="Jump to this external site">http://www.geocities.com/dritte123/PSPF.<wbr>html</a><br>The hardest thing to explain is the obvious</span> </td> <td> </td> </tr> <tr class="text_bg"> <td align="left" valign="bottom"><img src="../forum/images/left_bottom.gif" border="0" height="12" width="9"></td> <td valign="middle" align="center" colspan="7"> </td> <td align="right" valign="bottom"><img src="../forum/images/right_bottom.gif" border="0" height="12" width="9"></td> </tr> <tr class="page_bg"> <td colspan="9"> </td> </tr> </body> </html>