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SKU PMP-001-002
Perpetual Motion Pumps (PMP)
PMP The Prodigy Recovery Pump
$14,999.00
In stockSingle-stage 24 cfm solvent recovery pump with a 7.5 hp motor on a 220 V three-phase supply, and 1.5 in tri-clamp inlet and outlet. Manufacturer limits are 250 psi maximum bearing pressure, 150 psi maximum discharge pressure and a maximum delta pressure of 10x; unit weight is 750 lb. Published recovery figures run from 3.84 lb/min of butane at 0 psi inlet to 11.53 lb/min at 29 psi inlet.
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Description
Many factors go into the rate of recovery on an extraction system. Not only is the recovery pump size important, but also the evaporation rate of the solvents.If the solvents aren’t able to evaporate fast enough there will be nothing for the pump to transfer.
A larger PMP pumps have the capacity to transfer solvents faster, but only if the solvents are in an evaporated state. Because these pumps are so large they have a tendency to outpace the evaporation rate of most extraction systems.
This lowers the inlet pressure (and the collection vessel pressures) which aids in speeding up the evaporation rate. Propane weighs less per gallon than butane (4.2 vs 4.9),
however the vapor pressure is higher which generally results in a higher inlet pressure, and therefor a faster recovery per pound of gas used.
These pumps are sized large enough to recover on the largest extraction systems with the highest evaporation rates, or can be used on multiple extraction systems at one time. For example this recovery pump system was used to recover 5lbs of butane on a 6” vessel with 70° of temperature.
The process took ~12 minutes. However increasing the process to 3x 6” vessels with 5lbs of butane each(15lbs total), the process also took ~12 minutes. This is because the pump exceeds the evaporation rate of a single 6” column at 70° by more than 3x.
Because the single stage pump exceeds the evaporation rate a vacuum is pulled against the collection vessel, which in turn speeds up the evaporation rate.
However once vacuum equilibrium is achieved, increasing the pump size will not speed up the process, but will allow for larger (or multiple) processes to be preformed in the same time frame.
The next tab shows a table of recovery capacity with regards to inlet pressures. Higher inlet pressures result in substantially faster recovery times.
Higher inlet pressures can be achieved by evaporating solvents faster by higher temperatures in collection vessels, or more surface area in collection vessels (larger diameter vessels, falling film, etc).
*Instruction Manual*
Description
24CFMSingle Stage7.5HP220V – 3 Phase (Single Phase Inverters Available)Inlet: 1.5” TriclampOutlet: 1.5” TriclampWeight: 750lbsMax bearing pressure: 250psiMax discharge pressure: 150psiMax delta pressure: 10x
Inlet Pressure
LBS per Minute Butane
LBS per Minute Propane
-13 psi (Vacuum)
.48
0.35
-10 psi (Vacuum)
.96
0.7
-7 psi (Vacuum)
1.92
1.4
-4 psi (Vacuum)
2.88
2.09
0 psi
3.84
2.79
15 psi
7.69
5.59
29 psi
11.53
8.38
Frequently asked questions
What is the pump capacity and configuration?+
24 cfm, single stage, driven by a 7.5 hp motor. The manufacturer positions it for the largest extraction systems, or for serving several systems at once.
What recovery rates does the manufacturer publish?+
For butane: 0.48 lb/min at -13 psi inlet, 1.92 lb/min at -7 psi, 3.84 lb/min at 0 psi, 7.69 lb/min at 15 psi and 11.53 lb/min at 29 psi. Propane figures are lower at every point, from 0.35 lb/min at -13 psi to 8.38 lb/min at 29 psi. Higher inlet pressure is the single largest factor in recovery speed.
Will a larger pump always recover faster?+
No. The manufacturer's own guidance is that recovery rate is limited by how fast solvent evaporates upstream. Once the pump outpaces the evaporation rate and vacuum equilibrium is reached in the collection vessel, further pump capacity does not shorten the cycle; it allows larger or multiple processes in the same time.
What are the pressure limits?+
Maximum bearing pressure 250 psi, maximum discharge pressure 150 psi, maximum delta pressure 10x, as specified by the manufacturer.
What are the process connections?+
1.5 in tri-clamp on both the inlet and the outlet.
What supply and what installation allowance does it need?+
220 V three phase. Unit weight is 750 lb, so floor loading, rigging and access should be planned before delivery rather than on the day.
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