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The search for a proper recovery pump..
- Thread starter HighStateToke
- Start date
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Im wondering if running one gast pump for two machines is realistic. My basic understanding of this setup says yes. Could the gast's two intake ports be set up for individual machines, or does the input pressure/vac need to be the same on each intake port?
The pressures don't need to be matched. The Gast twin head pump is basically two pump heads on one motor. No problem...
Right on....Thank you RB!
What Rick said, about one 1/2 horse motor with a diaphragm pump on each end.
Within reason, they won't care what each other are doing, but they have upper and lower pressure limits, and some combinations of vacuum on one side of the diaphragm and pressure on the other will stall out the pump. It will pull about 26" Hg vacuum and put out about 60 psi pressure, but not both at the same time on the same diaphragm.
The owner of the Mk V that we mounted it on compares opening the recovery valve to driving a stick shift and developing a feel for letting out the clutch. You listen to what the pump sounds like as you slowly open the valve.
He repeatedly stalled it the first day and seldom stalls it anymore. It however is not as forgiving as a piston driven oil less pump.
If too great a different exists, the pump can be started by either allowing the oil less refrigerant pump to catch up so there is less pressure in the surge tank, or injecting a small amount of butane into the system, to reduce vacuum levels on the recovery side.
For what its worth, no rebuilds on the Pro Max 6000 thus far, after continued hard 16 hr 7 day week commercial use, until it was relocated about a week ago.
Prior experience tells us that it should have required rebuild long ago, but it is too early to see how much more life we get out of a set of piston seals by keeping them lubricated.
The whole system was just relocated and down a week while its new home was prepared and it was partially upgraded to Mk VB configuration. It was due back on line last night, so we should be continuing the test as we speak.
Within reason, they won't care what each other are doing, but they have upper and lower pressure limits, and some combinations of vacuum on one side of the diaphragm and pressure on the other will stall out the pump. It will pull about 26" Hg vacuum and put out about 60 psi pressure, but not both at the same time on the same diaphragm.
The owner of the Mk V that we mounted it on compares opening the recovery valve to driving a stick shift and developing a feel for letting out the clutch. You listen to what the pump sounds like as you slowly open the valve.
He repeatedly stalled it the first day and seldom stalls it anymore. It however is not as forgiving as a piston driven oil less pump.
If too great a different exists, the pump can be started by either allowing the oil less refrigerant pump to catch up so there is less pressure in the surge tank, or injecting a small amount of butane into the system, to reduce vacuum levels on the recovery side.
For what its worth, no rebuilds on the Pro Max 6000 thus far, after continued hard 16 hr 7 day week commercial use, until it was relocated about a week ago.
Prior experience tells us that it should have required rebuild long ago, but it is too early to see how much more life we get out of a set of piston seals by keeping them lubricated.
The whole system was just relocated and down a week while its new home was prepared and it was partially upgraded to Mk VB configuration. It was due back on line last night, so we should be continuing the test as we speak.
Great! I appreciate the in depth responses, as always 
ConcentrateChaz
Member
I just got a closed loop system and all this talk of recovery pumps is quite overwhelming. If I'm using my closed loop for personal QP runs, can I get away with using a promax? Thank you for your time
HighStateToke
Member
Given the possibility that the Promax will last as long or longer than a G5, it seems to be a better choice than the Appion, being nearly $200 less.
Chonkski
Member
When the promax is starting to fail from ware, will I know from pressure tests? Or are there better ways to catch it early on?
I have OCD sometimes. I worry that when the pump is running, in the future, that there is a possibility of getting atmosphere into the system?
Thanks you guys, greatly appreciated. As always
Chnski
I have OCD sometimes. I worry that when the pump is running, in the future, that there is a possibility of getting atmosphere into the system?
Thanks you guys, greatly appreciated. As always
Chnski
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Open the intake valve and close the outlet valve to see how long it takes to shut itself off from over pressure and once it has, whether it periodically cycles while sitting under pressure.
billybob25
New member
Grey Wolf, is the Appion G5 still the unit you guys recommend for the mkiiia or would I be better off buying the promax rg6000 or the haskel or a CARESAVER unit. I am currently building a mkiiia and am just trying to finalize my recovery pump selection.
Chonkski
Member
Billybob, I would say the promax is the best bet at this point because if you read the previous page of this thread, reports of the promax lasting just as long if not longer than the g5 before a rebuild is needed.
Also the rebuild for the rg6000 is about 3x as cheap as the g5.
Hightstatetoke also noted that it runs about 200$ cheaper than the g5 as well
Also the rebuild for the rg6000 is about 3x as cheap as the g5.
Hightstatetoke also noted that it runs about 200$ cheaper than the g5 as well
The rebuild cost the same, promax provides a cheaper kit but the pistons on both machines are indentical. I wouldn't jump to conclusions as to which last longer just yet, I've seen a promax fail in the first two weeks.
billybob25
New member
KK any one look at this machine, http://www.testequipmentdepot.com/yellow-jacket/refrigerant-recovery-equipment/recoverxlt/95760.htm
looks good, only pulls to 13 inches of vacuum though.
looks good, only pulls to 13 inches of vacuum though.
Chonkski
Member
To bad the promax doesn't have that CPR feature..
