New Booster In Town!!!

Brainx3 · 27th May 2008, 11:54

Nope thats compression-ratio. Stroke-volume is the Volume if each stage, normally meassured in cm^3 or liters.
(Wael) I don't have the exact number on my hand, but attached drawing can help you astimate, I will get back the exact number later.

I'm primarily interested in a booster for scaveging, so it has to be two-stage. Besides that maximum neeeded end-pressure is app. 200'ish bars, so: 230/8=28:1 therefor a 10/30 stageratio would do nice, and give higer flow than 15-40 (Assuming same drive-unit).
(Wael) By the theory, you can calculate any ratio you want, but on the cost side, to make a 10/30 booster from our factory, most of the raw materials won't be standard, which means you need enough patient to wait and enough money to pay the tooling cost for each raw part.
But something close to your requirement, we can manage 15/25 within reasonable prices.

Hmm, that I cannot understand! You graphs shows 62.5, or am I reading it wrong again?
My calcs:

Code:

 
The stall-pressure is decided by the interstage-pressure, 
but the low_ratio-piston gets helped by the high-ratio 
(Obs pressures in absolute):
Drive Pressure Pd = 9 bar abs
Drive-area  1 :1
1 st. Piston Rp = 15 :1
2 nd. Piston Rs = 40 :1
 
Interstage Stallpressure Pistall = Pd * 1/(1/Rp - 1/Rs) = 216 bar abs
Maximum input Pmax_in = Pistall/Rs*Rp = 81 bar abs

The above calc is however ideal, and it only works with a 100% efficient high-pressure-stage. When the highpressure-stage has a reallife deadspace-ratio the interstage-pressure becomes higher, and therefor the booster will stall. Accordingly the input-pressure should be somewhat lower. But nowhere liek 24bars?

(Wael)We limited the input pressure for getting strong scaveging ability. so let me explain how to read the Graphs.

We made the Graphs under Drive gas@6 bar, because we limited the input pressure less than 24,5bar, so what you should look at is only that yellow color line which denoted 20bar.

Maybe take an example, will be easier to understand.
Let's say, you have 20L cylinder with 180bar oxygen, now you want to fill into empty 2L cylinder.
First, you can connect them directly, oxygen will flow by itself till both cylinders at 163,6bar.
Then, the booster will start working from 163.6Bar, so the working performance should be like the attached picture, which I have already brushed in yellow.

Meanwhile I don't understand why you want the input press as high as it can, actually from the Graphs, you can see higher inlet pressure will be only helpful to get higher outlet pressure, which is not recommended for O2-boosting, at same time higher inlet will come with high end-pressure. after all even allow you 80bar inlet, you also need a regulator to modify the cylinder's pressure before boosting.

Hope this is helpful to make sense.

Hanssing · 28th May 2008, 17:32

Quote: (Originally Posted by Brainx3)

(Wael)We limited the input pressure for getting strong scaveging ability. so let me explain how to read the Graphs.

Just to make it perfectly clear for anyone reading this:
Limiting the input pressue does not in anyway enhance performance, it only reduces performance, and therefor makes no sense.
Wael: I think you dont have enough knowledge of this. I have never used a two-stage booster but I haveunderstandign of their principles!

Quote:

We made the Graphs under Drive gas@6 bar, because we limited the input pressure less than 24,5bar, so what you should look at is only that yellow color line which denoted 20bar.

As a diver we are offcoure interested in high flow, at lowest possible drivegas-use. This will wear the booster less, due to less cycles, and cost less to operate due to reduced drivegas use and reduces fill-time!
Again makes no sense.

Quote:

Maybe take an example, will be easier to understand.
Let's say, you have 20L cylinder with 180bar oxygen, now you want to fill into empty 2L cylinder.
First, you can connect them directly, oxygen will flow by itself till both cylinders at 163,6bar.
Then, the booster will start working from 163.6Bar, so the working performance should be like the attached picture, which I have already brushed in yellow.

First off this makes no sense at all: If you follow your example, you will be violating your own input-limit of 24bar!
Secondly if you actually do as you say, you will not be able too boost, since the booster will be stalled due to too high input pressure!
Again - have you actually used a twostage booster - I again say I have not, but clearly you either dont understand the twostage principle or have not even used one.

Quote:

Meanwhile I don't understand why you want the input press as high as it can, actually from the Graphs, you can see higher inlet pressure will be only helpful to get higher outlet pressure, which is not recommended for O2-boosting, at same time higher inlet will come with high end-pressure. after all even allow you 80bar inlet, you also need a regulator to modify the cylinder's pressure before boosting.

Well let me ask you two questions:
a) Whats the deciding factor of the boost-volume pr. stroke?
b) Whats the deciding factor of the maximum boost-pressure?

Think about it......

OK the answers:
a) The flow is given by CPM * Vol_1ststage * P_in. So the flow through the booster is proportional to the input-pressure. It is therefor offcourse optimal to run the booster at as high pressure as possible. If running a two-stage you will very quickly stall if applying too high input-pressure, therefor I originally asked for the rated input-pressure.
b) The output-pressure is given by P_drivegas * Ratio of secondary. Its actually higher if you have a high input-pressure, but 40:1 is high enough for most, so thats not really relevant.

Now can you follow my reasoning?

-------

Quote:

Hope this is helpful to make sense.

Wael I dont mean to be rude, but I'm not confident buying such equipment from a person which IMHO does not have the needed qualification for selling it!

Furthermore It has been brought to my attention that some discussions regarding your previous buisnesses on sweedish boards exist and theese boards does not higten my trust in your company - sorry.

Regards
Nicolai Hanssing

Brainx3 · 28th May 2008, 19:38

Hi,

Thanks for the feedback. Let me make this clear, we do NOT manufacture boosters but rather we work with a certain manufacturer to produce special versions to be used for diving purposes.

Secondly, all information published are taken directly from the manufacturer so whether there is something unclear or misunderstood, I'll be happy to forward questions and get answers cleared out for anyone as well as I, myself benifit from other people questions.

Thirdly, whether you prefer doing business with a certain company or not is something goes back to you and from our point we never had any problems with any of our customers at any time.

Best Regards. Wael

Christoph · 28th May 2008, 19:44

I find it most interesting that I had indeed quite the same questions and got nearly exactly the same wording back from emma (admin@euroshoppingzone.com).
She was most helpful and even so kind as to highlight the curve with the appropriate input pressure for the 15/40.
I still fail to understand why the input pressure has to be that low and would be glad if someone could explain the underlying principle.

Brainx3 · 28th May 2008, 20:12

I think you dont have enough knowledge of this. I have never used a two-stage booster but I haveunderstandign of their principles!
(Wael)hehe, I finnally understand you are showing the people your knowledge. please you needn't stand on me to do that if you are really qualified, please post your certificate.

As a diver we are offcoure interested in high flow, at lowest possible drivegas-use. This will wear the booster less, due to less cycles, and cost less to operate due to reduced drivegas use and reduces fill-time!
Again makes no sense.
(Wael)Please show us the perfect booster you have searched for. no matter what brand, how much, as long as it perfect for you. Please do NOT use the word "LESS", technique and science need numbers. I would like make one same performance for you. you can pay me after 2 year warrant.

First off this makes no sense at all: If you follow your example, you will be violating your own input-limit of 24bar!
Secondly if you actually do as you say, you will not be able too boost, since the booster will be stalled due to too high input pressure!
(Wael)of course booster works even IP higher than 24bar. but as saler we won't annouce so since it is enough for Oxygen. Please note that, I was saying, we limited the input. it is not technique limitation.

Again - have you actually used a twostage booster - I again say I have not, but clearly you either dont understand the twostage principle or have not even used one.

(Wael) AGAIN, POST YOUR CERTIFATE. or I supply you raw materials, you make one, post here.

Well let me ask you two questions:
a) Whats the deciding factor of the boost-volume pr. stroke?
b) Whats the deciding factor of the maximum boost-pressure?

Think about it......

OK the answers:
a) The flow is given by CPM * Vol_1ststage * P_in. So the flow through the booster is proportional to the input-pressure. It is therefor offcourse optimal to run the booster at as high pressure as possible. If running a two-stage you will very quickly stall if applying too high input-pressure, therefor I originally asked for the rated input-pressure.
b) The output-pressure is given by P_drivegas * Ratio of secondary. Its actually higher if you have a high input-pressure, but 40:1 is high enough for most, so thats not really relevant.

Now can you follow my reasoning?

(Wael)Thanks for MR Hanssing's show, but don't expect to stand on me again.hehe. Everyone watch TV, but not everyone want to make a TV.
-------

Wael I dont mean to be rude, but I'm not confident buying such equipment from a person which IMHO does not have the needed qualification for selling it!
(Wael) Everyone knows you are rude, and everyone knows you have never thought buying one. BUT I DO RATE YOU MAKE ONE since you are knowlege,and so self-confident. support you raw materials for free, I mean it.

Furthermore It has been brought to my attention that some discussions regarding your previous buisnesses on sweedish boards exist and theese boards does not higten my trust in your company - sorry.
(Wael) Yes, I lost in previous businesses because I was cheated by suppliers, and lost lots of the money. But obviously you didn't contact these boards personnally. And all these days conversation, this is the most important things you want to hightlight. - sorry, I don't think I need reply again, beside support you make Mr Hanssing booster.

Regards
Nicolai Hanssing

[/quote]

Hanssing · 28th May 2008, 20:37

Quote:

(Wael)hehe, I finnally understand you are showing the people your knowledge. please you needn't stand on me to do that if you are really qualified, please post your certificate.

Who cares about cetificates?
Its not a padi-orginasation selling boosters.

Quote:

(Wael)Please show us the perfect booster you have searched for. no matter what brand, how much, as long as it perfect for you. Please do NOT use the word "LESS", technique and science need numbers. I would like make one same performance for you. you can pay me after 2 year warrant.

The 15/40 is a very attractive booster, for the price, and depending on quality, and further specs. The original reason for this debate, was that I was, and stil is searching for a suitable two-stage boostewr for my diveclub. We have every intention of buying one, but are looking for the best buy.
A am perhaps due to my original qualifications as an engineer allways thorough when buying such kit.

Quote:

(Wael)of course booster works even IP higher than 24bar. but as saler we won't annouce so since it is enough for Oxygen. Please note that, I was saying, we limited the input. it is not technique limitation.

I have to point out, that boosting from a lower pressure involves more adiabatic compression and therefor heating (more work is performed on the boosted gas), and is therefor not a necessarily a good thing.... Again the higher the input-pressure, the better effeciency and the less heat (until stall), but if its only rated for 24.5bars then thats it.....

Quote:

(Wael) AGAIN, POST YOUR CERTIFATE. or I supply you raw materials, you make one, post here.

Out there.....

Quote:

(Wael) Everyone knows you are rude, and everyone knows you have never thought buying one. BUT I DO RATE YOU MAKE ONE since you are knowlege,and so self-confident. support you raw materials for free, I mean it.

Wael, see above. Still in the market. Twostage HII, HAskels and Maximators are probably out of our pricerange. Most attractive until now has beena refrubished Stansted or the GBT 15/40....

Quote:

(Wael) Yes, I am loser in previous business because I was cheated by suppliers, and lost all of the money. But obviously you didn't contact these boards personnally. And all these days conversation, this is the most important things you want to hightlight.

It was only brought to my attention yesterday evening! Since this thread has been promoting your company I thought I should point this out to others that were reading.
In some of your post you write you made the graphs, and decided the rated input-pressure. Now you also wrote you're only a dealer. I therefor have a little trouble deciding what role you you actually have?
I figure that you just retailing the boosters?

I tried to find references on the web for:
'DEKE SITEC' and 'Aqua Analytical Labs' without luck, so can you tell us more of these companies?

Regards
Nicolai

Brainx3 · 29th May 2008, 05:56

The 15/40 is a very attractive booster, for the price, and depending on quality, and further specs. The original reason for this debate, was that I was, and stil is searching for a suitable two-stage booster for my diveclub. We have every intention of buying one, but are looking for the best buy.

A am perhaps due to my original qualifications as an engineer allways thorough when buying such kit.
(Wael)I keep my promise, send me the specification of the perfect booster in your eyes, our manufactory will make a special order follow same spec.

I have to point out, that boosting from a lower pressure involves more adiabatic compression and therefor heating (more work is performed on the boosted gas), and is therefor not a necessarily a good thing.... Again the higher the input-pressure, the better effeciency and the less heat (until stall), but if its only rated for 24.5bars then thats it.....
(Wael)We thought about the heat problem, the SITEC booster has very good cooling system.

Wael, see above. Still in the market. Twostage HII, HAskels and Maximators are probably out of our pricerange. Most attractive until now has beena refrubished Stansted or the GBT 15/40....
(Wael)Personally I support you make one, Also keep my promise, offer you raw materials free, BUT you have to post here, the product and the performance. Hopefully better than GBT 15/40. I appreciate anyone to chanllenge the technique of the booster.

I tried to find references on the web for:
'DEKE SITEC' and 'Aqua Analytical Labs' without luck, so can you tell us more of these companies?
(Wael)Those letters won't work in Chinese symbols, so you will never have luck finding them online.

About DEKE SITEC, they started working on the booster from 1993, at beginning they were working as asia distribrtor for a famous American booster company, took care of after-sale service.

2004 they built up their own factory, started their own brand, but all of products are for industry use only -- since the technique diving hasn't been popular in china mainland, there is no market at all for diving application. Meanwhile their products for other industry use, has already been used in EU since 2005. they were OEM for an Italy company, that's why their products are CE stamped.

2007 They started working on diving booster.With strong industry background, sitting in world manufactory's rich raw materils bases, plus low labour-rate location, plus we import directly without any shipping forwarder/export & import media. that is why SITEC can offer better price without any quality compromise.

44gunner44 · 6th June 2008, 22:38

I'd like to find out ore information on this booster.

Can you send me through a plumbing diagram and and information on how the unit works.

Also are you willing to ship directly from manufacture to Australia? It would most likely save on shipping.

Regards

John

Brainx3 · 8th June 2008, 10:48

wibble. repeat after me, I will not make commercial posts....

Barjumpa · 10th June 2008, 06:58

Wael

Two questions.
How much "Drive" gas is required per minute to operate the 15/40? Over here is Australia we were advised that it may require as much as 10 cu ft per minute to operate at normal rate. I looked through your site but could not locate any reference to that issue.

2nd. Having gone to your web site I see that the photograph on page one of this thread and that photo in your site seem to be of two different boosters.
On page one there are filters, regulators and line coolers. Theyare not apparent on the website shot.

Thanks.

Geoff

28th May 2008, 17:32	#32 (permalink)
Hanssing flap-flop ..... flap-flop Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Nov 2005 Location: Denmark Posts: 406	Re: New Booster In Town!!! Quote: (Originally Posted by Brainx3) (Wael)We limited the input pressure for getting strong scaveging ability. so let me explain how to read the Graphs. Just to make it perfectly clear for anyone reading this: Limiting the input pressue does not in anyway enhance performance, it only reduces performance, and therefor makes no sense. Wael: I think you dont have enough knowledge of this. I have never used a two-stage booster but I haveunderstandign of their principles! Quote: We made the Graphs under Drive gas@6 bar, because we limited the input pressure less than 24,5bar, so what you should look at is only that yellow color line which denoted 20bar. As a diver we are offcoure interested in high flow, at lowest possible drivegas-use. This will wear the booster less, due to less cycles, and cost less to operate due to reduced drivegas use and reduces fill-time! Again makes no sense. Quote: Maybe take an example, will be easier to understand. Let's say, you have 20L cylinder with 180bar oxygen, now you want to fill into empty 2L cylinder. First, you can connect them directly, oxygen will flow by itself till both cylinders at 163,6bar. Then, the booster will start working from 163.6Bar, so the working performance should be like the attached picture, which I have already brushed in yellow. First off this makes no sense at all: If you follow your example, you will be violating your own input-limit of 24bar! Secondly if you actually do as you say, you will not be able too boost, since the booster will be stalled due to too high input pressure! Again - have you actually used a twostage booster - I again say I have not, but clearly you either dont understand the twostage principle or have not even used one. Quote: Meanwhile I don't understand why you want the input press as high as it can, actually from the Graphs, you can see higher inlet pressure will be only helpful to get higher outlet pressure, which is not recommended for O2-boosting, at same time higher inlet will come with high end-pressure. after all even allow you 80bar inlet, you also need a regulator to modify the cylinder's pressure before boosting. Well let me ask you two questions: a) Whats the deciding factor of the boost-volume pr. stroke? b) Whats the deciding factor of the maximum boost-pressure? Think about it...... OK the answers: a) The flow is given by CPM * Vol_1ststage * P_in. So the flow through the booster is proportional to the input-pressure. It is therefor offcourse optimal to run the booster at as high pressure as possible. If running a two-stage you will very quickly stall if applying too high input-pressure, therefor I originally asked for the rated input-pressure. b) The output-pressure is given by P_drivegas * Ratio of secondary. Its actually higher if you have a high input-pressure, but 40:1 is high enough for most, so thats not really relevant. Now can you follow my reasoning? ------- Quote: Hope this is helpful to make sense. Wael I dont mean to be rude, but I'm not confident buying such equipment from a person which IMHO does not have the needed qualification for selling it! Furthermore It has been brought to my attention that some discussions regarding your previous buisnesses on sweedish boards exist and theese boards does not higten my trust in your company - sorry. Regards Nicolai Hanssing __________________ Woohooo - I can change my rEvo! Its going to be bitchin' tricked out piece of gear
(Online)

28th May 2008, 19:38	#33 (permalink)
Brainx3 Totally Submerged Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Aug 2007 Location: International Waters Posts: 292	Re: New Booster In Town!!! Hi, Thanks for the feedback. Let me make this clear, we do NOT manufacture boosters but rather we work with a certain manufacturer to produce special versions to be used for diving purposes. Secondly, all information published are taken directly from the manufacturer so whether there is something unclear or misunderstood, I'll be happy to forward questions and get answers cleared out for anyone as well as I, myself benifit from other people questions. Thirdly, whether you prefer doing business with a certain company or not is something goes back to you and from our point we never had any problems with any of our customers at any time. Best Regards. Wael __________________ The depth of life cannot be measured in Bars, nor can the sea of lies, that lies within. Sooner or later I'll be cracking your market and end your game. *I don't take crap for an answer...*
(Offline)

28th May 2008, 20:12	#35 (permalink)
Brainx3 Totally Submerged Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Aug 2007 Location: International Waters Posts: 292	Re: New Booster In Town!!! I think you dont have enough knowledge of this. I have never used a two-stage booster but I haveunderstandign of their principles! (Wael)hehe, I finnally understand you are showing the people your knowledge. please you needn't stand on me to do that if you are really qualified, please post your certificate. As a diver we are offcoure interested in high flow, at lowest possible drivegas-use. This will wear the booster less, due to less cycles, and cost less to operate due to reduced drivegas use and reduces fill-time! Again makes no sense. (Wael)Please show us the perfect booster you have searched for. no matter what brand, how much, as long as it perfect for you. Please do NOT use the word "LESS", technique and science need numbers. I would like make one same performance for you. you can pay me after 2 year warrant. First off this makes no sense at all: If you follow your example, you will be violating your own input-limit of 24bar! Secondly if you actually do as you say, you will not be able too boost, since the booster will be stalled due to too high input pressure! (Wael)of course booster works even IP higher than 24bar. but as saler we won't annouce so since it is enough for Oxygen. Please note that, I was saying, we limited the input. it is not technique limitation. Again - have you actually used a twostage booster - I again say I have not, but clearly you either dont understand the twostage principle or have not even used one. (Wael) AGAIN, POST YOUR CERTIFATE. or I supply you raw materials, you make one, post here. Well let me ask you two questions: a) Whats the deciding factor of the boost-volume pr. stroke? b) Whats the deciding factor of the maximum boost-pressure? Think about it...... OK the answers: a) The flow is given by CPM * Vol_1ststage * P_in. So the flow through the booster is proportional to the input-pressure. It is therefor offcourse optimal to run the booster at as high pressure as possible. If running a two-stage you will very quickly stall if applying too high input-pressure, therefor I originally asked for the rated input-pressure. b) The output-pressure is given by P_drivegas * Ratio of secondary. Its actually higher if you have a high input-pressure, but 40:1 is high enough for most, so thats not really relevant. Now can you follow my reasoning? (Wael)Thanks for MR Hanssing's show, but don't expect to stand on me again.hehe. Everyone watch TV, but not everyone want to make a TV. ------- Wael I dont mean to be rude, but I'm not confident buying such equipment from a person which IMHO does not have the needed qualification for selling it! (Wael) Everyone knows you are rude, and everyone knows you have never thought buying one. BUT I DO RATE YOU MAKE ONE since you are knowlege,and so self-confident. support you raw materials for free, I mean it. Furthermore It has been brought to my attention that some discussions regarding your previous buisnesses on sweedish boards exist and theese boards does not higten my trust in your company - sorry. (Wael) Yes, I lost in previous businesses because I was cheated by suppliers, and lost lots of the money. But obviously you didn't contact these boards personnally. And all these days conversation, this is the most important things you want to hightlight. - sorry, I don't think I need reply again, beside support you make Mr Hanssing booster. Regards Nicolai Hanssing [/quote] __________________ The depth of life cannot be measured in Bars, nor can the sea of lies, that lies within. Sooner or later I'll be cracking your market and end your game. *I don't take crap for an answer...* Last edited by Brainx3 : 29th May 2008 at 04:34.
(Offline)

28th May 2008, 20:37	#36 (permalink)
Hanssing flap-flop ..... flap-flop Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Nov 2005 Location: Denmark Posts: 406	Re: New Booster In Town!!! Quote: (Wael)hehe, I finnally understand you are showing the people your knowledge. please you needn't stand on me to do that if you are really qualified, please post your certificate. Who cares about cetificates? Its not a padi-orginasation selling boosters. Quote: (Wael)Please show us the perfect booster you have searched for. no matter what brand, how much, as long as it perfect for you. Please do NOT use the word "LESS", technique and science need numbers. I would like make one same performance for you. you can pay me after 2 year warrant. The 15/40 is a very attractive booster, for the price, and depending on quality, and further specs. The original reason for this debate, was that I was, and stil is searching for a suitable two-stage boostewr for my diveclub. We have every intention of buying one, but are looking for the best buy. A am perhaps due to my original qualifications as an engineer allways thorough when buying such kit. Quote: (Wael)of course booster works even IP higher than 24bar. but as saler we won't annouce so since it is enough for Oxygen. Please note that, I was saying, we limited the input. it is not technique limitation. I have to point out, that boosting from a lower pressure involves more adiabatic compression and therefor heating (more work is performed on the boosted gas), and is therefor not a necessarily a good thing.... Again the higher the input-pressure, the better effeciency and the less heat (until stall), but if its only rated for 24.5bars then thats it..... Quote: (Wael) AGAIN, POST YOUR CERTIFATE. or I supply you raw materials, you make one, post here. Out there..... Quote: (Wael) Everyone knows you are rude, and everyone knows you have never thought buying one. BUT I DO RATE YOU MAKE ONE since you are knowlege,and so self-confident. support you raw materials for free, I mean it. Wael, see above. Still in the market. Twostage HII, HAskels and Maximators are probably out of our pricerange. Most attractive until now has beena refrubished Stansted or the GBT 15/40.... Quote: (Wael) Yes, I am loser in previous business because I was cheated by suppliers, and lost all of the money. But obviously you didn't contact these boards personnally. And all these days conversation, this is the most important things you want to hightlight. It was only brought to my attention yesterday evening! Since this thread has been promoting your company I thought I should point this out to others that were reading. In some of your post you write you made the graphs, and decided the rated input-pressure. Now you also wrote you're only a dealer. I therefor have a little trouble deciding what role you you actually have? I figure that you just retailing the boosters? I tried to find references on the web for: 'DEKE SITEC' and 'Aqua Analytical Labs' without luck, so can you tell us more of these companies? Regards Nicolai __________________ Woohooo - I can change my rEvo! Its going to be bitchin' tricked out piece of gear Last edited by Hanssing : 28th May 2008 at 20:40.
(Online)

29th May 2008, 05:56	#37 (permalink)
Brainx3 Totally Submerged Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Aug 2007 Location: International Waters Posts: 292	Re: New Booster In Town!!! The 15/40 is a very attractive booster, for the price, and depending on quality, and further specs. The original reason for this debate, was that I was, and stil is searching for a suitable two-stage booster for my diveclub. We have every intention of buying one, but are looking for the best buy. A am perhaps due to my original qualifications as an engineer allways thorough when buying such kit. (Wael)I keep my promise, send me the specification of the perfect booster in your eyes, our manufactory will make a special order follow same spec. I have to point out, that boosting from a lower pressure involves more adiabatic compression and therefor heating (more work is performed on the boosted gas), and is therefor not a necessarily a good thing.... Again the higher the input-pressure, the better effeciency and the less heat (until stall), but if its only rated for 24.5bars then thats it..... (Wael)We thought about the heat problem, the SITEC booster has very good cooling system. Wael, see above. Still in the market. Twostage HII, HAskels and Maximators are probably out of our pricerange. Most attractive until now has beena refrubished Stansted or the GBT 15/40.... (Wael)Personally I support you make one, Also keep my promise, offer you raw materials free, BUT you have to post here, the product and the performance. Hopefully better than GBT 15/40. I appreciate anyone to chanllenge the technique of the booster. I tried to find references on the web for: 'DEKE SITEC' and 'Aqua Analytical Labs' without luck, so can you tell us more of these companies? (Wael)Those letters won't work in Chinese symbols, so you will never have luck finding them online. About DEKE SITEC, they started working on the booster from 1993, at beginning they were working as asia distribrtor for a famous American booster company, took care of after-sale service. 2004 they built up their own factory, started their own brand, but all of products are for industry use only -- since the technique diving hasn't been popular in china mainland, there is no market at all for diving application. Meanwhile their products for other industry use, has already been used in EU since 2005. they were OEM for an Italy company, that's why their products are CE stamped. 2007 They started working on diving booster.With strong industry background, sitting in world manufactory's rich raw materils bases, plus low labour-rate location, plus we import directly without any shipping forwarder/export & import media. that is why SITEC can offer better price without any quality compromise. __________________ The depth of life cannot be measured in Bars, nor can the sea of lies, that lies within. Sooner or later I'll be cracking your market and end your game. *I don't take crap for an answer...* Last edited by Brainx3 : 29th May 2008 at 06:01.
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6th June 2008, 22:38	#38 (permalink)
44gunner44 New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Sep 2007 Location: Australia Posts: 9	Re: New Booster In Town!!! I'd like to find out ore information on this booster. Can you send me through a plumbing diagram and and information on how the unit works. Also are you willing to ship directly from manufacture to Australia? It would most likely save on shipping. Regards John
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8th June 2008, 10:48	#39 (permalink)
Brainx3 Totally Submerged Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Aug 2007 Location: International Waters Posts: 292	Re: New Booster In Town!!! wibble. repeat after me, I will not make commercial posts.... __________________ The depth of life cannot be measured in Bars, nor can the sea of lies, that lies within. Sooner or later I'll be cracking your market and end your game. *I don't take crap for an answer...* Last edited by EBT : 10th June 2008 at 08:26.
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10th June 2008, 06:58	#40 (permalink)
Barjumpa New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Sep 2007 Location: Sydney Posts: 10	Re: New Booster In Town!!! Wael Two questions. How much "Drive" gas is required per minute to operate the 15/40? Over here is Australia we were advised that it may require as much as 10 cu ft per minute to operate at normal rate. I looked through your site but could not locate any reference to that issue. 2nd. Having gone to your web site I see that the photograph on page one of this thread and that photo in your site seem to be of two different boosters. On page one there are filters, regulators and line coolers. Theyare not apparent on the website shot. Thanks. Geoff __________________ Leave No Bubbles...!And if it is down there I'm bringing it back up...!
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