Apeks flow rate

[Tortuga68]

Ease of breathing has more to do with the ability of the reg to maintain a constant IP supply to the second stage, not flow rate. It's easier to drink from a garden hose than a fire hose

There's no point having a flow rate of more than two stressed divers can hoover down, and there's no point having a first stage that can flow more than the tank valve, hose or other bottlenecks can cope with

The flow rate will vary according to supply pressure, so you'd have to know what the two regs were measured at before you could compare the figures, but suffice to sya that 300SCFM is waaaay more than you'd ever need for any normal scuba application

 

[Ste Wart]

The Ansti results for the 2 regs:
Apeks Products
Scubapro MK25 & S600

Shows that the FSR has a much better ease breathing.

 

[Tortuga68]

I see you found the ANSTI data that's on the Apeks website LOL

 

[Ste Wart]

Where else would I find information on Apeks?

 

[Tortuga68]

Look up, you might still catch it

 

[Ste Wart]

It's hard to touch the XTX200 for performance. It was the main reason for buying mine as back gas regs. I bought them on recommendation and only learned of it's performance in the ANSTI tests a year or so later. If memory serves the 200's were top, followed by the Legend then Poseidon (can't remember which). Scubapro were in the top 10.
The Ansti is good for WOB, but it is based on breathing Air at 50m. If you pump enough helium through any reg it will breathe well at depth. So; like most things posted on SB, take any info with a pinch of salt.
One thing I can't comment on is the MK25 perfomance as I've never used it . But I can add that although the 200 will work regardless of service the drop in performance after a year is significant. Sounds like teaching you grandmother to suck eggs, but I did 700+ dives before the first service on mine, nothing felt wrong until I took them in the water post-service. As I don't use piston regs I couldn't tell you how the MK25's would perform over that time.

 

[buddhasummer]

Only if you start breathing at 70 SCFM

The flowrate on the APEKS is more than enough for any real world situation. What's the highest flow rate you will ever need? Stressed at 300 feet maybe 10SCFM?

Bigger numbers are just marketing. I would argue that a larger flow rate is actually more dangerous as in the event of a freeflow/burst hose/blown O ring the tank will empty more quickly.

Thank you, that makes sense.

 

[buddhasummer]

Ease of breathing has more to do with the ability of the reg to maintain a constant IP supply to the second stage, not flow rate. It's easier to drink from a garden hose than a fire hose

There's no point having a flow rate of more than two stressed divers can hoover down, and there's no point having a first stage that can flow more than the tank valve, hose or other bottlenecks can cope with

The flow rate will vary according to supply pressure, so you'd have to know what the two regs were measured at before you could compare the figures, but suffice to sya that 300SCFM is waaaay more than you'd ever need for any normal scuba application

Thank you, I think I understand now.

 

[buddhasummer]

It's hard to touch the XTX200 for performance. It was the main reason for buying mine as back gas regs. I bought them on recommendation and only learned of it's performance in the ANSTI tests a year or so later. If memory serves the 200's were top, followed by the Legend then Poseidon (can't remember which). Scubapro were in the top 10.
The Ansti is good for WOB, but it is based on breathing Air at 50m. If you pump enough helium through any reg it will breathe well at depth. So; like most things posted on SB, take any info with a pinch of salt.
One thing I can't comment on is the MK25 perfomance as I've never used it . But I can add that although the 200 will work regardless of service the drop in performance after a year is significant. Sounds like teaching you grandmother to suck eggs, but I did 700+ dives before the first service on mine, nothing felt wrong until I took them in the water post-service. As I don't use piston regs I couldn't tell you how the MK25's would perform over that time.

Thanks for the info.

 

[buddhasummer]

Yes I thought there must more to it than initially looked, other wise why would you buy Apeks at 72 SCFM when you could buy a SP at 300 SCFM.

Thanks for all your replies. Today I learnt something new. Cheers.