Compressor for running my Booster

heyydude · 6th March 2007, 14:32

Stuart,

That compressor (the one in your link) will NOT do an adequate job of driving your booster. I have one just like it, but a double-tank (an Emglo) - it will drive the booster, but very, very poorly.

The trick, I found, was to have a very large supply of moderate pressure gas (140 psi is what I use). My Haskel says it requires a minimum of 150 psi, but I feed it 140 via a 3/4" pipe. It runs and runs all day long.

The Compressor I've got is a mongo horizontal dual-piston jobber with an 80 gallon tank. But you could probably do the same with a 40 or 60 gallon upright. The key to this is FLOW - you can have the best compressor in the world, but if you're feeding your booster with 1/4" lines, it's performance will be compromised.

Bigger is better, after all!

Kevin.

By the way, have you seen my new Compressor????

3451445.jpg

It's lovely, isn't it...? If you're ever in the States, drop by and I'll let you touch it.

Kevin.

***schford*** · 6th March 2007, 14:33

Could be tempted just to order it and see how it works *grins*

Tom Rose · 6th March 2007, 14:39

Quote: (Originally Posted by 4ster)

Tom,

Do you know the specs of your replacement compressor and how does it perform compared to running it off a scuba tank and regulator? I am running a Jetsam Baby Booster as well so your experience would be appreciated.

Here is a link that shows the specifications.

Porter-Cable 150 PSI, 6 Gal. Oil-Free Pancake Compressor

I got mine either at Home Depo or Lowes....just don't remember....I'm in those places so often it is a blur.

I never ran it beside a scuba tank but it has always filled my tanks as fast as I wanted and done a great job.

Quote:

I think I remember some discussion a while back that came to the conclusion that to do this right you 1) needed a rather large compessor to keep up with the volume of air needed by the booster and 2) filtering the air before it went into the booster was a good idea to maintain O2 cleanliness.
Steve

I do not filter the air (thats why I use an oil less) but I do dump the condensing water from the tank at the end of each session.

Tom

***schford*** · 6th March 2007, 14:54

Quote: (Originally Posted by heyydude)

Stuart,

That compressor (the one in your link) will NOT do an adequate job of driving your booster. I have one just like it, but a double-tank (an Emglo) - it will drive the booster, but very, very poorly.

The trick, I found, was to have a very large supply of moderate pressure gas (140 psi is what I use). My Haskel says it requires a minimum of 150 psi, but I feed it 140 via a 3/4" pipe. It runs and runs all day long.

The Compressor I've got is a mongo horizontal dual-piston jobber with an 80 gallon tank. But you could probably do the same with a 40 or 60 gallon upright. The key to this is FLOW - you can have the best compressor in the world, but if you're feeding your booster with 1/4" lines, it's performance will be compromised.

Bigger is better, after all!

Kevin.

By the way, have you seen my new Compressor????

Attachment 3893

It's lovely, isn't it...? If you're ever in the States, drop by and I'll let you touch it.

Kevin.

Show off :-)

Do you not think that my little baby booster will run ok then - it is not a big booster....

The compressor says

Max Working Pressure 145psi, 10bar
Air Flow 65Ltr/min

4ster · 6th March 2007, 15:06

Quote: (Originally Posted by Tom Rose)

Here is a link that shows the specifications.

Porter-Cable 150 PSI, 6 Gal. Oil-Free Pancake Compressor

I got mine either at Home Depo or Lowes....just don't remember....I'm in those places so often it is a blur.

I never ran it beside a scuba tank but it has always filled my tanks as fast as I wanted and done a great job.

I do not filter the air (thats why I use an oil less) but I do dump the condensing water from the tank at the end of each session.

Tom

Thanks Tom! I'm going shopping today!

Steve

heyydude · 6th March 2007, 15:16

Stuart,

This is the booster I use:

Haskel.jpg

I will defer to Tom's knowledge of your particular booster. But I will repeat: I found that my Emglo could not adequately drive my Haskel.

I still think Bigger is Better...

But I've been known to be wrong in the past (just ask my wife)...

Kevin.

iain-hsm · 6th March 2007, 16:46

Quote: (Originally Posted by schford)

Or can anyone point me at a better inexpensive compressor to drive the booster. Stuart

Stewart
1. First get from your booster supplier the drive air flow required and air drive pressure they specify to drive this booster.

2. Then take a careful look at the UK manuals for these LP compressors suggested on this site, one states its max temp indoors is 25 deg C and a 70% duty cycle per hour, the other states intermittent use and a 50% duty cycle for 15 minutes maximum run. These pumps are just Micky Mouse nail gun compressors, At a guess your going to need a bigger block.

3. Re the US pancake spec pump from Tom take a good look at that warranty It states "An air compressor that pumps air more than 50% during a one hour period is considered misuse because the air compressor is undersized for the required air demand”. Yer right .

4. As for Kevin and his new toy its just a Compair,wait till he gets to use it and starts paddling in the oil leaks, see what his wife has to say then!! lol

Tom Rose · 6th March 2007, 17:02

Quote: (Originally Posted by iain-hsm)

Stewart
1. First get from your booster supplier the drive air flow required and air drive pressure they specify to drive this booster.

2. Then take a careful look at the UK manuals for these LP compressors suggested on this site, one states its max temp indoors is 25 deg C and a 70% duty cycle per hour, the other states intermittent use and a 50% duty cycle for 15 minutes maximum run. These pumps are just Micky Mouse nail gun compressors, At a guess your going to need a bigger block.

3. Re the US pancake spec pump from Tom take a good look at that warranty It states "An air compressor that pumps air more than 50% during a one hour period is considered misuse because the air compressor is undersized for the required air demand”. Yer right .

Gosh, I may have been abusing my compressor...

When I fill my bottles, the compressor cycles during the early part of the fill and I can fill one of my small bottles in much less than an hour.....I'm just filling 1 and 2 liter bottles...not going on a space mission....just two to four hours of diving...I either carry the booster along and steal some oc leftover to drive the booster or carry an extra O2 tank to switch out if it is a long weekend.

A lot of this depends upon the starting pressure of your O2 supply. With the Jetsam I let the storage tank and the dive tank equalize before I start the boosting. Every thing stays cool....some like it hot...not me.

You are absolutly right about checking what the booster needs to drive it. As I said, the first compressor did not cut it, it was just one I had for nail guns....and light painting.

Tom

***schford*** · 6th March 2007, 17:20

Quote: (Originally Posted by iain-hsm)

Stewart
1. First get from your booster supplier the drive air flow required and air drive pressure they specify to drive this booster.

2. Then take a careful look at the UK manuals for these LP compressors suggested on this site, one states its max temp indoors is 25 deg C and a 70% duty cycle per hour, the other states intermittent use and a 50% duty cycle for 15 minutes maximum run. These pumps are just Micky Mouse nail gun compressors, At a guess your going to need a bigger block.

3. Re the US pancake spec pump from Tom take a good look at that warranty It states "An air compressor that pumps air more than 50% during a one hour period is considered misuse because the air compressor is undersized for the required air demand”. Yer right .

4. As for Kevin and his new toy its just a Compair,wait till he gets to use it and starts paddling in the oil leaks, see what his wife has to say then!! lol

This is what the spec is

SPECIFICATIONS
Weight .................................................. ...10.5 lbs (4.7 kg)
Dimensions .............................................13.25 "L x 3.25"D x 3.25"H
Pressure Ratio*........................................23:1
*Note: This is a mathematical ratio only. Actual pressure ratio will be less due to seal friction, dead space and gas compressibility.
Maximum outlet pressure....................3,450 psi

PERFORMANCE
System pressure after Equalization Approximate fill time Approximate fill rates

System pressure after equalization Approximate fill time Approximate fill rates 2,000-psi1.0-minutes3.0-scfm1,500-psi3.1-minutes 2.3-scfm1,000-psi7.3-minutes1.5-scfm500-psi20-minutes0.8-scfm
*Based on 105-psi shop air and 60 cycles per minute. NOTE: DO NOT exceed 70-100 psi/min fill rate for oxygen service.

Mark Chase · 6th March 2007, 17:20

I have the underpresure diving booster

Home

They seem to be using one of these to drive it with a filter added in line

Airmaster - Tiger 8/35 Air Compressor - DIY & Semi Professional Air Compressors - Machine Mart

I am thinknig of geting one I havent figured out what the filter is yet.

ATB

Mark Chase

6th March 2007, 14:32	#11 (permalink)
heyydude King of the Geeks Current Rebreather/s: MK 15.X Optima Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Addison, Pennsylvania Posts: 358	Re: Compressor for running my Booster Stuart, That compressor (the one in your link) will NOT do an adequate job of driving your booster. I have one just like it, but a double-tank (an Emglo) - it will drive the booster, but very, very poorly. The trick, I found, was to have a very large supply of moderate pressure gas (140 psi is what I use). My Haskel says it requires a minimum of 150 psi, but I feed it 140 via a 3/4" pipe. It runs and runs all day long. The Compressor I've got is a mongo horizontal dual-piston jobber with an 80 gallon tank. But you could probably do the same with a 40 or 60 gallon upright. The key to this is FLOW - you can have the best compressor in the world, but if you're feeding your booster with 1/4" lines, it's performance will be compromised. Bigger is better, after all! Kevin. By the way, have you seen my new Compressor???? 3451445.jpg It's lovely, isn't it...? If you're ever in the States, drop by and I'll let you touch it. Kevin.
(Offline)

6th March 2007, 14:33	#12 (permalink)
*schford* Despotic Overlord Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: London, UK Posts: 3,562	Re: Compressor for running my Booster Could be tempted just to order it and see how it works grins __________________ Bailout and Kit Management account for Murphy's Law The only bad question is one you did not ask and later wish you had. Use of Rebreather World is subject to the Rebreather World Terms & Conditions of Use
(Offline)

6th March 2007, 14:39	#13 (permalink)
Tom Rose Still Learning Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Prism Topaz Other CCR Home Build Join Date: Oct 2005 Location: USA,North Carolina Posts: 328	Re: Compressor for running my Booster Quote: (Originally Posted by 4ster) Tom, Do you know the specs of your replacement compressor and how does it perform compared to running it off a scuba tank and regulator? I am running a Jetsam Baby Booster as well so your experience would be appreciated. Here is a link that shows the specifications. Porter-Cable 150 PSI, 6 Gal. Oil-Free Pancake Compressor I got mine either at Home Depo or Lowes....just don't remember....I'm in those places so often it is a blur. I never ran it beside a scuba tank but it has always filled my tanks as fast as I wanted and done a great job. Quote: I think I remember some discussion a while back that came to the conclusion that to do this right you 1) needed a rather large compessor to keep up with the volume of air needed by the booster and 2) filtering the air before it went into the booster was a good idea to maintain O2 cleanliness. Steve I do not filter the air (thats why I use an oil less) but I do dump the condensing water from the tank at the end of each session. Tom __________________ The 50-50-90 rule: Anytime I have a 50-50 chance of getting something right, there's a 90% probability I'll get it wrong the first time. www.atlimp.com
(Offline)

6th March 2007, 14:54	#14 (permalink)
*schford* Despotic Overlord Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: London, UK Posts: 3,562	Re: Compressor for running my Booster Quote: (Originally Posted by heyydude) Stuart, That compressor (the one in your link) will NOT do an adequate job of driving your booster. I have one just like it, but a double-tank (an Emglo) - it will drive the booster, but very, very poorly. The trick, I found, was to have a very large supply of moderate pressure gas (140 psi is what I use). My Haskel says it requires a minimum of 150 psi, but I feed it 140 via a 3/4" pipe. It runs and runs all day long. The Compressor I've got is a mongo horizontal dual-piston jobber with an 80 gallon tank. But you could probably do the same with a 40 or 60 gallon upright. The key to this is FLOW - you can have the best compressor in the world, but if you're feeding your booster with 1/4" lines, it's performance will be compromised. Bigger is better, after all! Kevin. By the way, have you seen my new Compressor???? Attachment 3893 It's lovely, isn't it...? If you're ever in the States, drop by and I'll let you touch it. Kevin. Show off :-) Do you not think that my little baby booster will run ok then - it is not a big booster.... The compressor says Max Working Pressure 145psi, 10bar Air Flow 65Ltr/min __________________ Bailout and Kit Management account for Murphy's Law The only bad question is one you did not ask and later wish you had. Use of Rebreather World is subject to the Rebreather World Terms & Conditions of Use
(Offline)

6th March 2007, 15:06	#15 (permalink)
4ster Steve Sprague Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Mar 2006 Location: Arlington, Washington Posts: 294	Re: Compressor for running my Booster Quote: (Originally Posted by Tom Rose) Here is a link that shows the specifications. Porter-Cable 150 PSI, 6 Gal. Oil-Free Pancake Compressor I got mine either at Home Depo or Lowes....just don't remember....I'm in those places so often it is a blur. I never ran it beside a scuba tank but it has always filled my tanks as fast as I wanted and done a great job. I do not filter the air (thats why I use an oil less) but I do dump the condensing water from the tank at the end of each session. Tom Thanks Tom! I'm going shopping today! Steve __________________ Steve "My problem is that I have trouble reconciling my gross habits with my net income." Errol Flynn
(Offline)

6th March 2007, 15:16	#16 (permalink)
heyydude King of the Geeks Current Rebreather/s: MK 15.X Optima Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Addison, Pennsylvania Posts: 358	Re: Compressor for running my Booster Stuart, This is the booster I use: Haskel.jpg I will defer to Tom's knowledge of your particular booster. But I will repeat: I found that my Emglo could not adequately drive my Haskel. I still think Bigger is Better... But I've been known to be wrong in the past (just ask my wife)... Kevin.
(Offline)

6th March 2007, 16:46	#17 (permalink)
iain-hsm Custom Title Allowed! Current Rebreather/s: MK 15.X Other CCR Other SCR Other Rebreather/s: Other CCR Other SCR Join Date: Mar 2005 Location: Loughborough England uk Posts: 347	Re: Compressor for running my Booster Quote: (Originally Posted by schford) Or can anyone point me at a better inexpensive compressor to drive the booster. Stuart Stewart 1. First get from your booster supplier the drive air flow required and air drive pressure they specify to drive this booster. 2. Then take a careful look at the UK manuals for these LP compressors suggested on this site, one states its max temp indoors is 25 deg C and a 70% duty cycle per hour, the other states intermittent use and a 50% duty cycle for 15 minutes maximum run. These pumps are just Micky Mouse nail gun compressors, At a guess your going to need a bigger block. 3. Re the US pancake spec pump from Tom take a good look at that warranty It states "An air compressor that pumps air more than 50% during a one hour period is considered misuse because the air compressor is undersized for the required air demand”. Yer right . 4. As for Kevin and his new toy its just a Compair,wait till he gets to use it and starts paddling in the oil leaks, see what his wife has to say then!! lol
(Offline)

6th March 2007, 17:02	#18 (permalink)
Tom Rose Still Learning Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Prism Topaz Other CCR Home Build Join Date: Oct 2005 Location: USA,North Carolina Posts: 328	Re: Compressor for running my Booster Quote: (Originally Posted by iain-hsm) Stewart 1. First get from your booster supplier the drive air flow required and air drive pressure they specify to drive this booster. 2. Then take a careful look at the UK manuals for these LP compressors suggested on this site, one states its max temp indoors is 25 deg C and a 70% duty cycle per hour, the other states intermittent use and a 50% duty cycle for 15 minutes maximum run. These pumps are just Micky Mouse nail gun compressors, At a guess your going to need a bigger block. 3. Re the US pancake spec pump from Tom take a good look at that warranty It states "An air compressor that pumps air more than 50% during a one hour period is considered misuse because the air compressor is undersized for the required air demand”. Yer right . Gosh, I may have been abusing my compressor... When I fill my bottles, the compressor cycles during the early part of the fill and I can fill one of my small bottles in much less than an hour.....I'm just filling 1 and 2 liter bottles...not going on a space mission....just two to four hours of diving...I either carry the booster along and steal some oc leftover to drive the booster or carry an extra O2 tank to switch out if it is a long weekend. A lot of this depends upon the starting pressure of your O2 supply. With the Jetsam I let the storage tank and the dive tank equalize before I start the boosting. Every thing stays cool....some like it hot...not me. You are absolutly right about checking what the booster needs to drive it. As I said, the first compressor did not cut it, it was just one I had for nail guns....and light painting. Tom __________________ The 50-50-90 rule: Anytime I have a 50-50 chance of getting something right, there's a 90% probability I'll get it wrong the first time. www.atlimp.com
(Offline)

6th March 2007, 17:20	#19 (permalink)
*schford* Despotic Overlord Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: London, UK Posts: 3,562	Re: Compressor for running my Booster Quote: (Originally Posted by iain-hsm) Stewart 1. First get from your booster supplier the drive air flow required and air drive pressure they specify to drive this booster. 2. Then take a careful look at the UK manuals for these LP compressors suggested on this site, one states its max temp indoors is 25 deg C and a 70% duty cycle per hour, the other states intermittent use and a 50% duty cycle for 15 minutes maximum run. These pumps are just Micky Mouse nail gun compressors, At a guess your going to need a bigger block. 3. Re the US pancake spec pump from Tom take a good look at that warranty It states "An air compressor that pumps air more than 50% during a one hour period is considered misuse because the air compressor is undersized for the required air demand”. Yer right . 4. As for Kevin and his new toy its just a Compair,wait till he gets to use it and starts paddling in the oil leaks, see what his wife has to say then!! lol This is what the spec is SPECIFICATIONS Weight .................................................. ...10.5 lbs (4.7 kg) Dimensions .............................................13.25 "L x 3.25"D x 3.25"H Pressure Ratio........................................23:1 Note: This is a mathematical ratio only. Actual pressure ratio will be less due to seal friction, dead space and gas compressibility. Maximum outlet pressure....................3,450 psi PERFORMANCE System pressure after Equalization Approximate fill time Approximate fill rates System pressure after equalization Approximate fill time Approximate fill rates 2,000-psi1.0-minutes3.0-scfm1,500-psi3.1-minutes 2.3-scfm1,000-psi7.3-minutes1.5-scfm500-psi20-minutes0.8-scfm Based on 105-psi shop air and 60 cycles per minute. NOTE:* DO NOT exceed 70-100 psi/min fill rate for oxygen service. __________________ Bailout and Kit Management account for Murphy's Law The only bad question is one you did not ask and later wish you had. Use of Rebreather World is subject to the Rebreather World Terms & Conditions of Use
(Offline)

6th March 2007, 17:20	#20 (permalink)
Mark Chase I go down for ages Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,700	Re: Compressor for running my Booster I have the underpresure diving booster Home They seem to be using one of these to drive it with a filter added in line Airmaster - Tiger 8/35 Air Compressor - DIY & Semi Professional Air Compressors - Machine Mart I am thinknig of geting one I havent figured out what the filter is yet. ATB Mark Chase __________________ Is it supposed to make that noise ? I took my unit to the dive shop and demanded they bolt on every thing that would fit. Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System
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