John Pham
Registered
I'm building a Nitrox Stik using Max Air 35 gas compressor and having a hard time deciding which reliable flowmeter to get, what should I look for in a flowmeter and your recommendation. Thanks
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Thanks, what lpm should I be looking at?Buy a Dwyer. Very accurate and reliable. A great way to do it is attach a solenoid between the oxygen reg and the flow meter. Wire it to the compressor to shut the solenoid when the compressor is off
A 40% mix uses 1/4 O2. so min 1/4th of the compressor capacity. If 6 cuft then >1.5 cuft and that is apx 30 ltr per cuft or >45 ltr/min. or 0-3600 liters per hour.,,,,, in cuft / hour would be about 100Thanks, what lpm should I be looking at?
Awesome, Thanks You =)A 40% mix uses 1/4 O2. so min 1/4th of the compressor capacity. If 6 cuft then >1.5 cuft and that is apx 30 ltr per cuft or >45 ltr/min. or 0-3600 liters per hour.,,,,, in cuft / hour would be about 100
DWYER NAT. GAS RATE-MASTER FLOW METER | eBay
Dwyer instruments Flow Meter | eBay
RMB-54 0-200 SCFH Dwyer Flow Meter | eBay
there are a lot more out there
This is exactly what I have. Set up for my 8 CFM Mako. I regulate the O2 down to 10 PSI with a regular welding reg and have a solenoid wired into the time delay on the compressor so the compressor is up to speed and oil pressure is good. 10 seconds after the compressor starts, flow starts. 56 lpm for 32%, 66 lpm for 36%.Buy a Dwyer. Very accurate and reliable. A great way to do it is attach a solenoid between the oxygen reg and the flow meter. Wire it to the compressor to shut the solenoid when the compressor is off
I just used a welding oxygen regulator and modified the outlet to throttle the flow a bit. I can then dial up the nitrox mix I want to within 0.25%. All it took was a little experimentation at the start to work out what % I got for a few different psi readings. Then an Excel spreadsheet to work out what each 50 psi increment gave. Easy.
Except for that whole exploding compressor thing when it auto shut offs and the first stage fills with O2 and it autostarts when you put the next fill on, I wholeheartedly agree.You can get a new 0-15 lpm O2 reg on ebay for $25. At 100lpm flow (which only actually happens on start up under no load) you need 14 lpm for 32%.
Autoshutoffs and such add-ons are nice but the max air 35 is not continuous duty, so you need to watch and attend it anyway. Save your money.