Buying a new booster. Poblem is choosing the model?!? Pls Help!

[omerzitelia]

Hello Friends,

I am now planning the setting up of my blending station.

I have chosen a compressor Bauer Poseidon 250 TE but I have a problem choosing the correct booster.

I have been advised to go for Hydraulics International. Now I am looking into several of their models. I have used boosters but never really dug deep into the matter so can anyone advise what booster size would be sufficient to fill stage tanks and top up main ones. This is only for my personal use so I will not be filling more than 2-3 stage tanks at one and topping up 2-3 twins for me and my buddies.

I am looking into the following models Hydraulics International :

5G-SS-30
5G-TS-14/30
5G-TS-30/50

Can anyone advise?

thanks guys!

 

[divingtactics]

Yes, did the same exercise myself a while back.

5G-TS-14/30 is the best one for your needs as it has the most flexibility. However, I ended up going for a Haskel AGT15/30 as it doesn't suffer the same interstage stall as the HI. Which is surprising as they are very similar pumps in theory.

 

[rjack321]

5G-SS-30 single stage, for small rebreather or deco bottles, not doubles
5G-TS-14/30 excellent for home use or shop use
5G-TS-30/50 overkill for most shops

 

[divingtactics]

I agree with what rjack321 says and will add a couple of points:

5G-SS-30 - Single stage, will not draw a G down to much less than 40 bar.
5G-TS-14/30 - Perfect, but just regulate input gas to prevent interstage stall, as well as drive gas, but will pull a G down to vacuum.
5G-TS-30/50 - I would expect this would have huge drive gas requirements and is not practical for a home.

 

[divingtactics]

5G-TS-30/50 - I would expect this would have huge drive gas requirements and is not practical for a home.

Just to add a little info, I would estimate that this model would be about 30% slower and use about 30 to 40% more drive gas if you started with equalized cylinders. Then as the ratio between the input pressure and output pressures grow, as it does with boosting, your speed nearly halves and your drive gas requirement nearly doubles. So, this is definitely not a good choice for you in my opinion. Stick with the 5G-TS-14/30 or get a Haskel AGT15/30 which are ideally perfect for the pressure ranges that we use in scuba cylinders. They are both hard on drive gas too, but you just have to make sure you have plenty. I run a small compressor (140 Litres per minute) and have two dedicated G sized banks to run my Haskel and it works perfectly without me needing to start my compressor - except to fill the banks with drive gas.