TIF 9100V Vacuum Pump Problem
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As a retired electronic engineer, I have had at least a casual interest in both high-vacuum and mechanically-pumped vacuum techniques.
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Recently I ran into a vacuum problem with my TIF 9100V vacuum pump while pumping down the air-conditioning system of a Volvo.? Rather than the fault being in the pump, it seems to be a leak between the isolation valve and vacuum port of the system, as when the vacuum port is capped and the isolation valve closed, the six vacuum led indicators rather quickly go out (the vacuum gauge is connected between the valve and port).
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As this pumping system is mechanically complex to disassemble, I thought it wise to ask an appropriate interest group if members have encountered, diagnosed, and solved this problem.? But searching , I could not locate any professional HVAC groups.? Thus I was led to your vacuum group.? I hope this is not off-topic for this group
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Regards,
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Bruce Hunter
Mill Valley, CA |
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I am not sure this group is an ideal fit. Here we are fixated on vacuum?chambers for metal coating processes of telescope mirrors and such. MUCH higher vacuum levels than what AC units need. "Always take the high road. There's less traffic." Observatory Engineer Summit Kinetics Waikoloa, Hawaii On Sat, Apr 23, 2022 at 10:35 PM ebrucehunter via <Brucekareen=[email protected]> wrote:
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At least you can replace your pump for around $150. Our pumps are more in the multiple thousands or even tens-of-thousands range. "Always take the high road. There's less traffic." Observatory Engineer Summit Kinetics Waikoloa, Hawaii On Sat, Apr 23, 2022 at 10:40 PM Christopher Erickson via <christopher.k.erickson=[email protected]> wrote:
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Christopher and other members of this group,
I apologize for sending my stumbling inquiry about an A/C pump to this group.? I did so only because the group's core interest was not obvious from the masthead. Nevertheless, I've had an interest in high vacuum techniques beginning as a youngster when constructing apparatus to generate microwaves at 100 GHz on a hobby basis.? In the late 1950's a researcher at Bell Laboratories developed an improved silicon material for diode frequency multipliers operating in that range.? I wrote and tried to beg a sample, but was told Bell Labs policies limited such distributions to educational institutions.? However, the researcher provided a detailed procedure for how I could create my own by evaporating a molecular layer of phosphorus on a silicon substrate.? I was in the midst of trying to figure out how to assemble the apparatus to do this when I was offered another position that totally consumed my free time and thought. Later, my career later led to an involvement with high power transmitting vacuum tubes costing in the $100k range where vacuum maintenance was very important.? An interesting recollection was that one manufacturer shared their cost for electrical power to bake out one such type for months was in the $10k range.? This tube sold for about $100k.? Now at 84, I probably will probably not be utilizing high-vacuum apparatus; however, I enjoy reading about the adventures and accomplishments of others.? So, thanks for allowing me to join this group. Bruce Hunter Mill Valley, California |
ebrucehunter
Christopher Erickson