New Booster In Town!!!

JoaoRosario · 11th May 2008, 16:22

These unit looks great both the equipment and the price. Just got an Haskel . Will keep your contact you never know .
Wish you all the best.

Regards

João Rosário
joao.rosari@pinguimsub.pt

Mike Costanzo · 11th May 2008, 20:22

Waiting for your report. Let us know. I'm up for a Sweden trip.

Brainx3 · 13th May 2008, 04:57

Hi,

Thanks for all the PMs you sent me guys. To reply to some of the questions I got, these 2 models are designed specifically for our company in Sweden (Euro Shopping Zone AB) and therefore we have the exclusive right to sell them. Orders take 2 weeks to be delivered.

Best Regards. Wael

mattias · 13th May 2008, 05:54

I`ll come and test it next time i`m home in GBG.....

Probably sometime around x-mas.

Brainx3 · 13th May 2008, 11:52

Hi,

These are the performance graphs for both models.

Best Regards. Wael

Hanssing · 26th May 2008, 14:09

Quote: (Originally Posted by Brainx3)

Hi,

These are the performance graphs for both models.

Best Regards. Wael

Could you please post some more data regarding the boosters?

Is maximum pressure really 8 bars?
- This means that it needs a modified IP-1st. stage to run if used for travels (most other boosters allow for 10bars).
- Please post piston-volume to dead-space ratio for each stage?
- Please post stroke-volume of each stage.
- What sort of warrenty is provided.
- Are other models available, such as 5/15 or 10/30 (Higer flow, lower end-pressure)?
- What is maximum inlet-pressure the 15/40 can handle without stalling?
(@ 8bars drive, think my cals says about 70bars?)....
- Whats the minimum recommended cycletime for O2-boosting?

I have some trouble reading the graphs:
- What is Nm3/min - In my world thats N=Newton. I'm guessing thats its something like Normalised Air Use?
- Apparently the graphs uses variable cycle-times, since the flow drops with increasing pressure. Could you please provide constant-cycle-time plots?

Regards
Nicolai Hanssing

Brainx3 · 26th May 2008, 23:43

Here are the answers in blue

Could you please post some more data regarding the boosters?
(Wael)Yes, Please see more in attachment for GBT15/40

Is maximum pressure really 8 bars?
(Wael)Yes, less than 8,3bar recommended

- This means that it needs a modified IP-1st. stage to run if used for travels (most other boosters allow for 10bars).
(Wael)Actually the principle of boosters are similar, regardless the brands. GBT15/40 also can run well with 10bars, but it will be short-lived.

- Please post piston-volume to dead-space ratio for each stage?
(Wael) For GBT15/40 is 160mm
- Please post stroke-volume of each stage.
(Wael) For GBT15/40 is 1:15:40
- What sort of warrenty is provided.
(Wael) Average overhaul duty cycle is 2000 hours. It has a 24 month factory warranty. Life time service is available at additional cost.(if you always use 10bars drive gas, I guess the commitment i should give you is half of them

)

- Are other models available, such as 5/15 or 10/30 (Higer flow, lower end-pressure)?
(Wael)From your questions, I know you are experienced, so I needn't explain more how hard for the booster to be High flow with low end-pressure coming together, we normally ask the individual customer about his/her priority, and see his/her drive gas conditions, try to maximize the individual solution. Here I only highlight 2 points.
1, We do have a new model GBD40 coming soon, it is single stage with double action. It offers diver Higher flow 130L/min, but not so good as 2 stages booster's end-pressure.
2, We accept customer special order, please email to info@eurodivingzone.com

- What is maximum inlet-pressure the 15/40 can handle without stalling?
(@ 8bars drive, think my cals says about 70bars?)....
(Wael) GBT15/40 Max Inlet is 24,5bars

- Whats the minimum recommended cycletime for O2-boosting?
(Wael)Are u asking CPM? For o2, we designed no greater than
50 Cycle/Minute, but we didn't specify Minimum.

I have some trouble reading the graphs:
- What is Nm3/min - In my world thats N=Newton. I'm guessing thats its something like Normalised Air Us
(Wael)1Nm3/min = 1000L/min

Apparently the graphs uses variable cycle-times, since the flow drops with increasing pressure. Could you please provide constant-cycle-time plots?
(Wael)About reading the graphs, I will sent you another email to explain the detail, it will be too much to be here.

TMVA · 27th May 2008, 07:08

Quote: (Originally Posted by Brainx3)

(Wael)About reading the graphs, I will sent you another email to explain the detail, it will be too much to be here.

Hi Brainx3.
Could you please send me a copy of that mail.
andersen_thorsten@yahoo.com
Best Thorsten.

Hanssing · 27th May 2008, 07:52

Quote:

- Please post piston-volume to dead-space ratio for each stage?
(Wael) For GBT15/40 is 160mm

By deadspace ratio imean stroke-volume to total volume of the stage. This is a critical factor for the efficiency of the boosters. I think it typical better than 1:20.

Quote:

- Please post stroke-volume of each stage.
(Wael) For GBT15/40 is 1:15:40

Nope thats compression-ratio. Stroke-volume is the Volume if each stage, normally meassured in cm^3 or liters.

Quote:

- What sort of warrenty is provided.
(Wael) Average overhaul duty cycle is 2000 hours. It has a 24 month factory warranty. Life time service is available at additional cost.(if you always use 10bars drive gas, I guess the commitment i should give you is half of them

)

Would offcourse run it at rated drive-pressure. Actually it makes it esier to find a shop-compressor for it! So its not a bad thing, and adjusting IP is not hard :-)

Quote:

- Are other models available, such as 5/15 or 10/30 (Higer flow, lower end-pressure)?
(Wael)From your questions, I know you are experienced, so I needn't explain more how hard for the booster to be High flow with low end-pressure coming together, we normally ask the individual customer about his/her priority, and see his/her drive gas conditions, try to maximize the individual solution. Here I only highlight 2 points.
1, We do have a new model GBD40 coming soon, it is single stage with double action. It offers diver Higher flow 130L/min, but not so good as 2 stages booster's end-pressure.
2, We accept customer special order, please email to info@eurodivingzone.com

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).

Quote:

- What is maximum inlet-pressure the 15/40 can handle without stalling?
(@ 8bars drive, think my cals says about 70bars?)....
(Wael) GBT15/40 Max Inlet is 24,5bars

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?

Quote:

- Whats the minimum recommended cycletime for O2-boosting?
(Wael)Are u asking CPM? For o2, we designed no greater than
50 Cycle/Minute, but we didn't specify Minimum.

Hmm I asked for minimum cycle time wich is the same as 1 / maximum cycle-frequency. So you answered my question

Quote:

Apparently the graphs uses variable cycle-times, since the flow drops with increasing pressure. Could you please provide constant-cycle-time plots?
(Wael)About reading the graphs, I will sent you another email to explain the detail, it will be too much to be here.

[/quote]
Please post it here - others could be interested.

Thanks for the answers

Nicolai

peter · 27th May 2008, 11:45

Quote: (Originally Posted by Brainx3)

I got, these 2 models are designed specifically for our company in Sweden (Euro Shopping Zone AB) and therefore we have the exclusive right to sell them.

So in 2 years say you go bankrupt, who will supply us with spare parts?

11th May 2008, 16:22	#21 (permalink)
JoaoRosario New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Jan 2008 Location: Portugal Posts: 5	Re: New Booster In Town!!! These unit looks great both the equipment and the price. Just got an Haskel . Will keep your contact you never know . Wish you all the best. Regards João Rosário joao.rosari@pinguimsub.pt
(Offline)

11th May 2008, 20:22	#22 (permalink)
Mike Costanzo Never E nuff Current Rebreather/s: Classic Kiss Other Rebreather/s: Classic Kiss Join Date: Apr 2007 Location: Berlin,Md/Port Salerno,Fl - USA Posts: 117	Re: New Booster In Town!!! Waiting for your report. Let us know. I'm up for a Sweden trip. __________________ Mike Costanzo CK #318
(Offline)

13th May 2008, 04:57	#23 (permalink)
Brainx3 Temporary Read only mode for site infractions Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Aug 2007 Location: Borås, Sweden Posts: 274	Re: New Booster In Town!!! Hi, Thanks for all the PMs you sent me guys. To reply to some of the questions I got, these 2 models are designed specifically for our company in Sweden (Euro Shopping Zone AB) and therefore we have the exclusive right to sell them. Orders take 2 weeks to be delivered. Best Regards. Wael
(Offline)

13th May 2008, 05:54	#24 (permalink)
mattias New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Inspiration Classic Not Bought Yet Join Date: Jun 2006 Location: Koh Samui Posts: 11	Re: New Booster In Town!!! I`ll come and test it next time i`m home in GBG..... Probably sometime around x-mas.
(Offline)

26th May 2008, 14:09	#26 (permalink)
Hanssing flap-flop ..... flap-flop Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Nov 2005 Location: Denmark Posts: 340	Re: New Booster In Town!!! Quote: (Originally Posted by Brainx3) Hi, These are the performance graphs for both models. Best Regards. Wael Could you please post some more data regarding the boosters? Is maximum pressure really 8 bars? - This means that it needs a modified IP-1st. stage to run if used for travels (most other boosters allow for 10bars). - Please post piston-volume to dead-space ratio for each stage? - Please post stroke-volume of each stage. - What sort of warrenty is provided. - Are other models available, such as 5/15 or 10/30 (Higer flow, lower end-pressure)? - What is maximum inlet-pressure the 15/40 can handle without stalling? (@ 8bars drive, think my cals says about 70bars?).... - Whats the minimum recommended cycletime for O2-boosting? I have some trouble reading the graphs: - What is Nm3/min - In my world thats N=Newton. I'm guessing thats its something like Normalised Air Use? - Apparently the graphs uses variable cycle-times, since the flow drops with increasing pressure. Could you please provide constant-cycle-time plots? Regards Nicolai Hanssing __________________ Woohooo - I can change my rEvo! Its going to be bitchin' tricked out piece of gear
(Offline)

27th May 2008, 07:08	#28 (permalink)
TMVA New Member Current Rebreather/s: rEvo Other CCR Other Rebreather/s: rEvo Other CCR Join Date: Mar 2007 Location: Denmark Posts: 17	Re: New Booster In Town!!! Quote: (Originally Posted by Brainx3) (Wael)About reading the graphs, I will sent you another email to explain the detail, it will be too much to be here. Hi Brainx3. Could you please send me a copy of that mail. andersen_thorsten@yahoo.com Best Thorsten. Last edited by TMVA : 27th May 2008 at 07:11.
(Online)

27th May 2008, 07:52	#29 (permalink)
Hanssing flap-flop ..... flap-flop Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Nov 2005 Location: Denmark Posts: 340	Re: New Booster In Town!!! Quote: - Please post piston-volume to dead-space ratio for each stage? (Wael) For GBT15/40 is 160mm By deadspace ratio imean stroke-volume to total volume of the stage. This is a critical factor for the efficiency of the boosters. I think it typical better than 1:20. Quote: - Please post stroke-volume of each stage. (Wael) For GBT15/40 is 1:15:40 Nope thats compression-ratio. Stroke-volume is the Volume if each stage, normally meassured in cm^3 or liters. Quote: - What sort of warrenty is provided. (Wael) Average overhaul duty cycle is 2000 hours. It has a 24 month factory warranty. Life time service is available at additional cost.(if you always use 10bars drive gas, I guess the commitment i should give you is half of them ) Would offcourse run it at rated drive-pressure. Actually it makes it esier to find a shop-compressor for it! So its not a bad thing, and adjusting IP is not hard :-) Quote: - Are other models available, such as 5/15 or 10/30 (Higer flow, lower end-pressure)? (Wael)From your questions, I know you are experienced, so I needn't explain more how hard for the booster to be High flow with low end-pressure coming together, we normally ask the individual customer about his/her priority, and see his/her drive gas conditions, try to maximize the individual solution. Here I only highlight 2 points. 1, We do have a new model GBD40 coming soon, it is single stage with double action. It offers diver Higher flow 130L/min, but not so good as 2 stages booster's end-pressure. 2, We accept customer special order, please email to info@eurodivingzone.com 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). Quote: - What is maximum inlet-pressure the 15/40 can handle without stalling? (@ 8bars drive, think my cals says about 70bars?).... (Wael) GBT15/40 Max Inlet is 24,5bars 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/RsRp = 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? Quote:* - Whats the minimum recommended cycletime for O2-boosting? (Wael)Are u asking CPM? For o2, we designed no greater than 50 Cycle/Minute, but we didn't specify Minimum. Hmm I asked for minimum cycle time wich is the same as 1 / maximum cycle-frequency. So you answered my question Quote: Apparently the graphs uses variable cycle-times, since the flow drops with increasing pressure. Could you please provide constant-cycle-time plots? (Wael)About reading the graphs, I will sent you another email to explain the detail, it will be too much to be here. [/quote] Please post it here - others could be interested. Thanks for the answers Nicolai __________________ Woohooo - I can change my rEvo! Its going to be bitchin' tricked out piece of gear Last edited by Hanssing : 27th May 2008 at 08:06.
(Offline)

27th May 2008, 11:45	#30 (permalink)
peter New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Jan 2005 Location: Göteborg/Sweden Posts: 45	Re: New Booster In Town!!! Quote: (Originally Posted by Brainx3) I got, these 2 models are designed specifically for our company in Sweden (Euro Shopping Zone AB) and therefore we have the exclusive right to sell them. So in 2 years say you go bankrupt, who will supply us with spare parts? __________________ Peter
(Online)

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