Search results

https://canada.newark.com/multicomp/psf109s-81-330/pressure-switch-spdt-11-9psi/dp/24R7147 I've used this switch on my setup and adjusted it to 18-in/hg and it's works well at maintaining the setpoint. Of course, your going to get a lot of foaming at first so you should trigger it manually and...

No smoke, no oil. Even when left running at full load and as hot as 90C it does not let off a smell unless it injests some of the wine. Read through my previous post to get an understanding of the operating conditions that this pump is supposed to be working in. Also considering that Volvo...

Nice chamber, but that's cost prohibitive for my setup, would rather spend that on more grapes [emoji16] As for the pump, check my last few post and you will see that the pump is able to pull a vacuum down to -27inhg at full load. I do have a vacuum switch connected to it and plan on raising...

Connecting the vacuum pump to a more accurate gauge. Pump running at full it's able to pull -27inhg. I had my vacuum switch set a -25inhg. My carboys were able to hold the pressure and fully degas my wine. -25inhg is a bit much for degassing so I'll lower to -22inhg next time around, but...

Thanks. Will do. Already sucked up some shmoo while degassing, but not to concerned. These pumps are designed to ingest engine air that comprised of fuel/oil vapours, combustion byproducts, and water vapor. Pretty sure they can eat it and keep working without issues. [emoji16]

Not too concerned unless they are damaged or of poor quality. Also, with such a small head space there little potential for a catastrophic failure and will more likely fail in a way that would result in a pressure crack, the carboy falling to pieces, and me loosing that volume of wine. That's...

I've been busy. Finally got it hooked up to a better power supply. It sucks! [emoji16] Already degassed most of my wine and it works quite well. It may also work well as a vacuum transfer pump at the flow seems improved with the step up in voltage.

Well... Seems like the power supply is weak. Used a cheap one that I had on hand. Metered the voltage when the pump is running and voltage drops down to 9-10V, quite significant and it will affect the pumps output. I'll wire it to a proper power supply and take better measurements when I get a...

So I left the pump running for about 15mins. Was still running strong but the output did drop a bit to 16in-HG as it got hot. Measuring the pump temp it was up to 95*C... Hot, but not worrisome as again, these pumps operate under the hood of a motor vehicle in the heat of summer in places like...

My bad. Wrong link. Here's the recent video.

More testing. Here is is running at full load. The degassing CO2 is keeping press at 18" seems to be working well enough.

I'm still not understanding how you're using PSI. Maybe they are mixing up their units? On some PSI gauges, positive is in PSI, negative values are in inHG.

Here is one example of a guy using a refrigerant vacuum pump to degas. These pumps are capable of pulling a vacuum close to absolute. That's strong enough to cause the alcohol and water to boil. [emoji33]

If it was plastic I would. If it was a lesser quality carboy then I would also be concerned. I am quite confident with the car boys that I'm using that they are able to hold vacuum pressure. A quick search shows people are using their vacuum setups on glass carboys to as low as 23", that's a bit...

Pressure and flow are not the same thing. This pump might be insufficient for vacuum transfer. While it may have enough working pressure to pull a column of water 285in, there is no specification on flow rate. Judging by the system that this pump was designed for there is very little volume for...

Maybe this helps. I always input inHG as a positive value that reference negative pressures, but the calculators want a ( - ) to calculate negative values. I guess the proper unit is ( X in -HG ) where -HG reference a negative value.... Clear as mud [emoji16].

Not sure how/why you're using psi, but anyways, in-HG is roughly half of PSI. Using absolute PSI, a perfect vacuum has a PSIA of 0. At sea level atmospheric pressure is PSIA 14.7 which equals 1 atmosphere. 1bar = 14.5 PSIA If we were using gauge PSI, then 0 PSIG = 1 atm = 0inhg. If we pulled a...

The pump is a Hella UP28. From my testing running the pump at full load it was able to pull a maximum of 21" quite easily. It also draws 6-7amp at 12V tested with my amp meter. It's operating range is 9-16v so if you wanted to get more work out of it you could up the voltage, but you would also...

I'm new to vacuum degassing, haven't had much time to read into it so I have no clue at what temperatures and pressures are acceptable. I was going to read into it a bit more but if anyone can provide links with information that would be great. While the vacuum switch is not adjustable, it is...

Hello First off, this is my first post! So hi everyone. I've been lurking for years and have always found great answers to my questions through searching, thanks for being such an awesome community. Thought I would use my first post as a contribution. I don't plan on being too active in the...