[MasterVaporPump]

Originally Posted by HG23

I have called and talked with Richard at Master Vapor.

Their pump is indeed a diaphragm type driven by a NEMA 7 electric motor. It uses CO2 for backing pressure.

They are working on a 150PSI model for higher propane mixes that is still in development for several months.

One thing that I found especially interesting is the fact that the internals of the pump are all FDA approved. Richard thought the wear and dust created by friction in a reciprocating type pump would not pass muster once someone analyses the cleanliness of our process.

Before I saw Master Vapor, I was thinking about buying a Blackmer, however, even though I'm familiar with their design I worry about lubrication oil leaking through into the gas stream. What do you think RB? I know you guys own a couple Blackmers at this point.

Graywolf, one thing I have been wondering about is the max output of these pumps in relation to the level of vapor pressure assist I use. Sometimes my vapor pressure tank will have 100+ PSI when I'm trying to push cold solvent around. It's during those times I'm most concerned about exceeding the output pressure limits of pumps like this.

Hello friends I'm Tracy with Master Vapor Pumps. I'm here to answer any question you have about our new MVP-6CFM electric diaphragm hydrocarbon solvent extraction processing pump.

I'll start with the questions I have seen:
The MVP-6CFM's maximum continuous output pressure is 60 psi and can increase to 70 psi in intervals. The MVP6 is different from any other electric diaphragm pump in the fact that it cannot "stall out". Instead of allowing the pump to overload, the MVP6 disengages the diaphragm at the gearbox level. Once the pressure reduces the gearbox engages and the pump continues operation. This happens without stalling out or causing any damage to the pump or its motor.

It's true that we are working on a 150 PSI model, but that's only to continue to move towards the perfect pump. The current 60 psi model works flawlessly even with pure propane. Propane went first when we started testing in the field. Of course adequate heat exchange is required to keep the pressure down.however any pump needs a heat exchange to operate efficiently. The pump is a workhorse, and the specs are moderate for what it can actually handle.

The MVP-6CFM is MAWP 350. It uses a CO2 cushion as backpressure for the diaphragm. Even during a rupture there is no chance of air contaminating the system or gas leaking out. This was the largest limiting factor for diaphragm pumps to actually achieve 3rd party certification. We solved that problem.

The real sleeper game changer here is the -27HG that the MVP-6CFM pulls. Our customers have been replacing nitrogen and warm gas pushes with the vacuum power of the pump. Compared to other pumps which struggle to pull a vacuum, this is a serious improvement.

[HWY36]

https://www.refrigerant-recovery.com/...recovery-unit/

Anyone have experience with one of these? My friend has one and runs propane; he swears by it.

I've been running heavy propane through cmep-ol's and the output side is always 100 psi. The guy at xtractor depot, currently fixing one of them, says that's too high. Any advice? Are the cmep-ol going the way of the dinosaur? I hate to think so cause I've got 4. Help!

[learningta]

Originally Posted by MasterVaporPump

The MVP-6CFM is MAWP 350. It uses a CO2 cushion as backpressure for the diaphragm. Even during a rupture there is no chance of air contaminating the system or gas leaking out. This was the largest limiting factor for diaphragm pumps to actually achieve 3rd party certification. We solved that problem.

Do you guys have a real website other than your facebook/IG presence?

Any drawings/pictures of what the pump internals actually look like? Full spec sheet?

Does customer need to supply tank and regulator for the gas cushion on the backside of the diaphragms?

What's a rebuild kit cost and what parts does it include?

The real sleeper game changer here is the -27HG that the MVP-6CFM pulls. Our customers have been replacing nitrogen and warm gas pushes with the vacuum power of the pump. Compared to other pumps which struggle to pull a vacuum, this is a serious improvement.

I'm very skeptical of this claim. While I don't doubt that your pump can pull vacuum (and if it can do it long-term without falling apart like the CMEP pumps do, I commend your engineering team). Assuming that your storage tank is holding cold liquid and is at 0 PSI pressure the max amount of push that you can get from putting vacuum on the end of that liquid line is going to be 1 ATM (14.69 PSI).

Now, if you let enough of that liquid thru the pump you may get more but that's using a hot gas push due to heat of compression thru your pump.

I'm not trying to shit on your pump design - I'd love an opportunity to test one out though I'm not sitting on enough cash to buy one outright. But keep in mind that everybody here heard many of the exact same claims about the CMEP and those of us stupid enough to fall for the lies found out very quickly that it was sales malarkey, not anything with roots in reality.

[Pangea]

I'm sick of adapting down to my recovery tanks. Can one use the normally plugged ports that are on a tank, in the process? Can I remove the center Y valve, replace it with a dedicated vapor valve, as well as replace the plugged 3/4" opening with an additional vapor valve/port, and use the 1/4" plugged opening as the liquid port with dip tube? Would it be recommended to use a special seal tape/dope like one see's on tanks?

Thanks.

[coldcanna]

I'm looking for something sub $1000, only really need it to last a year or so until I can get the client base to move up to the Haskells. I see a lot of people talking about the Robinair RG6 or the CPS TRS600 and others... is there a general consensus on the best value for a recovery pump in this price range?

[Old Gold]

Run passively. I run a small column that holds 1000g currently, and can recover 6kg in an hour to an hour and a half. And that is slow by my standards (due to shitty plumbing and thin vessels).

[Pangea]

Yeah thats what Im doing, considering that your recovery speed is not far off what I get with a pump and all the baggage involved with it.

How much condensing surface area can one achieve for the same cost as one or two TR21's?

Deep freeze glycol baths and multiple 100lbs tanks in my immediate future.

[Old Gold]

You could do a mock Bizzybee recovery, and use a sleeved dewax column to recover into, but leave the bottom valve open and constantly draining into the recovery tank. Thinner columns will maximize your surface area for cooling, unless you can also imploy an internal cooling coil or similar.

I am currently just submerging one recovery tank in dry ice.

Half way through recovery, if you flush the recovered solvent back into the feed/storage tank, you take a lot of load off of the dry ice, and speed the recoovery way up again. Also a good way to pull muffins to full vacuum at the very end of recovery...

[coldcanna]

Originally Posted by Old Gold

Run passively. I run a small column that holds 1000g currently, and can recover 6kg in an hour to an hour and a half. And that is slow by my standards (due to shitty plumbing and thin vessels).

I was under the impression that the recovery times for using a pump was 15-20 mins vs an hour or 2 doing it passively but if I'm mistaken please let me know.... this is for income not just for my own use.

So just to clarify, your 1000g column takes 6kg to flood and your spending 60-90 mins right? Or did you mean your recovering your 1000g column 6 times to make 6kg of product?

[Pangea]

Originally Posted by Old Gold

You could do a mock Bizzybee recovery, and use a sleeved dewax column to recover into, but leave the bottom valve open and constantly draining into the recovery tank. Thinner columns will maximize your surface area for cooling, unless you can also imploy an internal cooling coil or similar.

I am currently just submerging one recovery tank in dry ice.

Half way through recovery, if you flush the recovered solvent back into the feed/storage tank, you take a lot of load off of the dry ice, and speed the recoovery way up again. Also a good way to pull muffins to full vacuum at the very end of recovery...

I dont have a rack/stand yet, so mock bizzy style is not easily achievable.
I also like to keep it simple and cheap, so for chilling dont want to have to deal with consumables or commercial chillers etc. For my situation its less work and hassle to just have a few deep freezers churning.

Good tip on clearing out your recovered tanks part way through!