Swagelok SS-SS2 metering valve/pelagian valve

W

WFO

Member
Afternoon :)

For those of you using this valve or similar, do they shut all the way off? Or do you add separate flow-stop to avoid it dumping the contents of the first stage/hoses into the rig even if you turn O2 bottle off.

Cheers
 
Reviving this old thread :ignore:
Any chance of some details of the Swagelok valve ?
I'd like to know the full model number, how it's fitted
and how it's used.

Thanks in advance :thumbsup:
 
This valve is a low pressure one (10bar) and the range is from 1l to 150l per minute. I think it is made by Legris.
 
The best valves to use are the Swagelok SS2 Series low flow valves . I have produced around 30 over the last couple of years for mccr users . Normally fully closed they give you under .1 ltr min as Swagelok recommends that you do not fully close as you can damage seat. Needle taper is .29 to.32 and hole is .30 so very precise flow rates are achieved.
 
Chris Kennedy said:
The best valves to use are the Swagelok SS2 Series low flow valves . I have produced around 30 over the last couple of years for mccr users . Normally fully closed they give you under .1 ltr min as Swagelok recommends that you do not fully close as you can damage seat. Needle taper is .29 to.32 and hole is .30 so very precise flow rates are achieved.
Click to expand...

Hi Chris can you tell me if these are used with a capped 1st stage and if so
what would be the maximum interstage pressure that it would be set at ?
 
Capt Morgan said:
Hi Chris can you tell me if these are used with a capped 1st stage and if so
what would be the maximum interstage pressure that it would be set at ?
Click to expand...


Not used with sealed first stage so not depth limited. That's why you need to adjust the flow at you change depth.

Tony
 
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As Tony said use normally compensated first stage ,as you descend you will normally adjust the flow rate to maintain the desired ppo2 which means you will decrease flow the deeper you go. You must remember on ascent to increase the flow correspondingly.
 
Thanks for the information guys, as I'm sure you guessed I don't know
a lot about them and have never seen one being used.
I'm just looking for a way to remove the depth limitation of my unit so
am trying to gather some ideas.
The needle valve looks like a better idea than a stronger spring and a
smaller orifice although the latter seems to be simpler to use.
 
Capt - maybe take a look at the Parker VCD 1000 doodahs. I think they give a constant flow regardless of increases in supply pressure. The 750 is the flow you need, I think. They come in 316 too.

Stan.
 
Stan said:
Capt - maybe take a look at the Parker VCD 1000 doodahs. I think they give a constant flow regardless of increases in supply pressure. The 750 is the flow you need, I think. They come in 316 too.

Stan.
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I have seen that valve before but can't seem to find a UK supplier.
 
No mate, I took a punt on one on fleabay, but it turned out to be the wrong thing. I'll post it over to you if you want to see the size of them? I thought I could change the flow element in it - I think that's what stumped the Parker questions dept!

I might have your email address (sent the pics of the OSTC3 over), but pm it anyway.
 
Stan said:
No mate, I took a punt on one on fleabay, but it turned out to be the wrong thing. I'll post it over to you if you want to see the size of them? I thought I could change the flow element in it - I think that's what stumped the Parker questions dept!

I might have your email address (sent the pics of the OSTC3 over), but pm it anyway.
Click to expand...

Thanks Stan, I have seen a few on fleabay but couldn't tell what model they were
though they did look like alloy. Now to brace myself for the shock of the price ;)
 
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