whats the difference between Harris multi stage model 92-15, 92-50 and 92-100

[37ford4dr]

well my son asked me the difference between the model 92 series 92-15,92-50 and 92-100 so we pulled the SEAL-SEAT parts list and tried to make some sense out of what makes them different. it looks like from the parts list that the model number has alot to do with the set up of gauge pressure parameters, inlet/outlet stems and fittings, diaphragm assembly and it looks like pressure adjusting springs are different also. I think we saw the differences bewteen high pressure oxygen and low pressure acetylene

so the question i still couldnt answer was what was the difference between a 92-50-510 (propane gauges 0-500,0-60 and a 92-15-300 or 510 (acetylene 0-500,0-30) it looks to me like the only difference is in the gauges and that the pressure adjusting springs are different.

are we missing something or are the 92-15 and 92-50 regulators really that similar? thks bob

[farmall]

it looks to me like the only difference is in the gauges and that the pressure adjusting springs are different.

That's all you need to differentiate CGA-510 regulators. The lighter spring on acetylene gives finer control over that pressure range.

You could certainly use an LP reg with acetylene, just don't turn it up too high. You can also turn up acetylene regs beyond safe pressure, so....don't do that! :waving:

Under no circumstances turn acetylene up more than 15 psi. I don't go over 10. That's why they put an adjusting screw/knob on fuel regulators.

You can also use acetylene regs with LP if their soft parts are compatible. If the part numbers match, they are. Email factory tech support if in doubt.

I did similar research when I modded my Victor acetylene regs with heavier springs and higher range low pressure gauges.

[con_fuse9]

Quick glance at Harris website:
9200-50-346
9200 == the series (in this case 2 stage high flow)
50 == total flow rating (gonna use a big torch, get higher flow rating...)
346 == fitting (300, 346, 580 etc.)

So basically, pick your gas (that's the last number) then pick the flow you need.
50 is good to about 500 scfh, 250 to about 2000 scfh (at 200psi). The smaller ones will regulate better when the tank pressure gets low. If you planning a large cutting torch to cut through 10" steel, get the bigger gauge.

[Fred s]

lots of acet regs have internals that will not let the pressure go over 15. However, dont forget, every time you turn on your acet tank, you just pushed ~250 psi into the reg and it stays that way for a while

[37ford4dr]

lots of acet regs have internals that will not let the pressure go over 15. However, dont forget, every time you turn on your acet tank, you just pushed ~250 psi into the reg and it stays that way for a while

but both regulators get "charged" the same way right? and they just hold it until you have purged them or it leaks out

[farmall]

but both regulators get "charged" the same way right? and they just hold it until you have purged them or it leaks out

Correct.

http://en.wikipedia.org/wiki/Pressure_regulator#Oxy-fuel_welding_and_cutting

[37ford4dr]

...

http://en.wikipedia.org/wiki/Pressure_regulator#Oxy-fuel_welding_and_cutting

so is the set screw i have seen on the backside of the two stage regulator the "factory set" first stage pressure reduction valve?