Help with BHO vacuum pump/ Chamber

[Broly]

Hi guys and gals,

Recently took up making bho to make my own vapes/dabs/edibles instead of being poisoned by potential spice (not legal in my country so black market crap is everywhere)

This is my second run after a steep learning curve on the first run with everything going well so far this run, with me blasting an oz of material, hot water bath for initial purge of butane, dissolving in 95% food grade alcohol, filtering off and evaping the mixture before putting in the vacuum chamber thats sat on a digital got plate at 110°f

A question regarding the purge have came up however and I can't find an answer to it;

1. I've seen many people say you don't need to keep pump running for vac chamber and the manufactures instructions back this up saying to limit on time to 5 min. This however lead to bubbles being formed in the mixture but not popping (the mix is spread about as thin as a credit card) I upped the temps to 120°f with it being etHO as seen recommended by a member by the name of GrayWolf yet the bubbles still weren't popping. Vacuum is pulled down to an indicated -29.5 inHG as to not boil of THC or too many terps but last night I thought I'd try leaving the pump running and the bubbles started forming and popping (looked like the whole thing was breathing) the only thing that's confusing me is that the vacuum gauge when pump continues running goes way past -30 inHG. It's safe to assume that the gauge is faulty and that a 150 micron single stage pump can't actually pull down that far? If so how many inHG can a 150 micron pump pull at max?

Hope that makes sense!

Thanks Broly

 

[cronicoldguy]

I use a vacuum oven. Once I have it down to vacuum, pump is shut off. My oven seals very well and pressure loss over time is very little. I might kick the pump in once over 8 hrs.
Once you have chamber under vacuum, play with temp for the bubbles. Dont go too high on temp though.

As far as your pump question goes, this came from ChatGPT:

The maximum pressure a pump can pull, typically measured in inches of mercury (inHg), depends on the specific design and specifications of the pump. A 150 micron pump is a type of vacuum pump designed to achieve a very low pressure, often used in applications requiring high vacuum.

In terms of pressure:

• 150 microns is equivalent to 0.15 millimeters of mercury (mmHg).
• To convert this to inches of mercury (inHg), you can use the conversion factor: 1 mmHg ≈ 0.03937 inHg.

So, 150 microns (0.15 mmHg) is approximately:

0.15 mmHg×0.03937 inHg/mmHg≈0.0059 inHg0.15 \text{ mmHg} \times 0.03937 \text{ inHg/mmHg} \approx 0.0059 \text{ inHg}0.15 mmHg×0.03937 inHg/mmHg≈0.0059 inHg

This value indicates how low the pressure can go, not how much pressure the pump can pull.

High-quality vacuum pumps can often achieve pressures as low as 0.0001 inHg, but this will vary based on the pump's design and intended application. Always refer to the manufacturer's specifications for precise performance data.

 

[Broly]

I use a vacuum oven. Once I have it down to vacuum, pump is shut off. My oven seals very well and pressure loss over time is very little. I might kick the pump in once over 8 hrs.
Once you have chamber under vacuum, play with temp for the bubbles. Dont go too high on temp though.

As far as your pump question goes, this came from ChatGPT:

The maximum pressure a pump can pull, typically measured in inches of mercury (inHg), depends on the specific design and specifications of the pump. A 150 micron pump is a type of vacuum pump designed to achieve a very low pressure, often used in applications requiring high vacuum.

In terms of pressure:

• 150 microns is equivalent to 0.15 millimeters of mercury (mmHg).
• To convert this to inches of mercury (inHg), you can use the conversion factor: 1 mmHg ≈ 0.03937 inHg.

So, 150 microns (0.15 mmHg) is approximately:

0.15 mmHg×0.03937 inHg/mmHg≈0.0059 inHg0.15 \text{ mmHg} \times 0.03937 \text{ inHg/mmHg} \approx 0.0059 \text{ inHg}0.15 mmHg×0.03937 inHg/mmHg≈0.0059 inHg

This value indicates how low the pressure can go, not how much pressure the pump can pull.

High-quality vacuum pumps can often achieve pressures as low as 0.0001 inHg, but this will vary based on the pump's design and intended application. Always refer to the manufacturer's specifications for precise performance data.

Thanks brother!