Dual Stage Regulators

Left C

Lifetime Members
Sep 26, 2005
2,500
1
36
69
Burlington, NC
nipat;43353 said:
I've tried to look at the diagram several times but still don't know why lower input pressure creates higher output pressure (in single stage regs) which causes EOTD. :confused:
Inlet pressure aids in sealing which is reduced as pressure decreases as well.
 

S&KGray

Guru Class Expert
Nov 18, 2009
236
0
16
Garden Island
Is is possible to connect directly to CO2 tubing from a Swagelok tubing connector? Instead of adapting to 1/8 npt and then using a 1/8 npt hose barb fitting?
 

Left C

Lifetime Members
Sep 26, 2005
2,500
1
36
69
Burlington, NC
S&KGray;43372 said:
Is is possible to connect directly to CO2 tubing from a Swagelok tubing connector? Instead of adapting to 1/8 npt and then using a 1/8 npt hose barb fitting?
It is as long as you are using 1/8" OD tubing for the 1/8" fittings. (same fitting size to same OD)
http://www.swagelok.com/search/find_products_home.aspx?SEARCH=/id-10000009/type-1

Swagelok even has tubing to tubing adapters.

brass: http://www.swagelok.com/search/product_detail.aspx?part=B-200-6

nylon: http://www.swagelok.com/search/product_detail.aspx?part=NY-200-6

SS: http://www.swagelok.com/search/product_detail.aspx?part=SS-200-6CP
 

eiginh

Prolific Poster
Sep 17, 2009
38
0
6
SWAGELOK STAINLESS STEEL FITTINGS
Do I need all this in order to use a Victor 253a-1993 with a clippard solenoid? I'm going stainless for the look...

Stainless Steel 1/4" MPT x 1/8" MPT Hex Reducing Nipple ( SS-4-HRN-2 ) $6.15


Stainless Steel 1/4" MPT x 1/8" FPT Reducer Bushing SS-4-RB-2 $5.74


Stainless Steel 1/8" MPT Hex Nipple ( SS-2-HN ) $4.72


Stainless Steel 1/4" MPT x 1/4" MPT Elbow SS-4-ME $14.05


Stainless Steel Tubing Connector, 1/8" MPT x 1/8" ID Tubing SS-2-HC-1-2 $5.64


Stainless Steel Tubing Connector, 1/8" FPT x 1/8" ID Tubing SS-2-HC-7-2 $12.71
 

Left C

Lifetime Members
Sep 26, 2005
2,500
1
36
69
Burlington, NC
eiginh;43385 said:
SWAGELOK STAINLESS STEEL FITTINGS
Do I need all this in order to use a Victor 253a-1993 with a clippard solenoid? I'm going stainless for the look...

Stainless Steel 1/4" MPT x 1/8" MPT Hex Reducing Nipple ( SS-4-HRN-2 ) $6.15


Stainless Steel 1/4" MPT x 1/8" FPT Reducer Bushing SS-4-RB-2 $5.74


Stainless Steel 1/8" MPT Hex Nipple ( SS-2-HN ) $4.72


Stainless Steel 1/4" MPT x 1/4" MPT Elbow SS-4-ME $14.05


Stainless Steel Tubing Connector, 1/8" MPT x 1/8" ID Tubing SS-2-HC-1-2 $5.64


Stainless Steel Tubing Connector, 1/8" FPT x 1/8" ID Tubing SS-2-HC-7-2 $12.71

Where's the links? Now I have to look them all up. I'll be back in a little bit.
 

Left C

Lifetime Members
Sep 26, 2005
2,500
1
36
69
Burlington, NC
You have some parts wrong.

List them in order starting at the regulator and working all the way to the tubing.

You have too many male 1/4" parts to tell what you are actually trying to do.
 

Left C

Lifetime Members
Sep 26, 2005
2,500
1
36
69
Burlington, NC
Swagelok Stainless Steel 1/4" and 1/8" Pipe Fittings



Ripe Reducers

SS-4-HRN-2 Hex Reducing Nipple, 1/4 in. Male NPT x 1/8 in. Male NPT Price: $6.15
SS-8-HRN-4.jpg


SS-4-RB-2 Reducing Bushing, 1/4 in. Male NPT x 1/8 in. Female NPT Price: $5.74
SS-4-RB-2.jpg


SS-4-RA-2 Reducing Adapter, 1/4 in. Female NPT x 1/8 in. Male NPT Price: $8.92
reducingadapter.jpg




Pipe Elbows

SS-2-E Elbow, 1/8 in. Female NPT Price: $15.99
SS-4-E Elbow, 1/4 in. Female NPT Price: $18.56
FemaleElbow.jpg


SS-2-ME Male Elbow, 1/8 in. Male NPT Price: $13.33
SS-4-ME Male Elbow, 1/4 in. Male NPT Price: $14.05
SS-4-ME.jpg


SS-2-SE Street Elbow, 1/8 in. Female NPT x 1/8 in. Male NPT Price: $16.40
SS-4-RSE-2 Reducing Street Elbow, 1/4 in. Female NPT x 1/8 in. Male NPT Price: $21.43
SS-4-SE Street Elbow, 1/4 in. Female NPT x 1/4 in. Male NPT Price: $18.56
maleandfemaleelbow.jpg




Nipples

SS-4-CN Close Nipple, 1/4 in. Male NPT Price: $5.64
SS-2-CN Close Nipple, 1/8 in. Male NPT Price: $4.10
closenipple.jpg


SS-4-HLN-1.50 Hex Long Nipple, 1/4 in. Male NPT, 1 1/2 in. Length Price: $6.77
SS-4-HLN-2.00 Hex Long Nipple, 1/4 in. Male NPT, 2 in. Length Price: $8.51
SS-2-HLN-1.50 Hex Long Nipple, 1/8 in. Male NPT, 1 1/2 in. Length Price: $7.69
SS-2-HLN-2.00 Hex Long Nipple, 1/8 in. Male NPT, 2 in. Length Price: $8.20
hexlongnipple.jpg


SS-4-HN Hex Nipple, 1/4 in. Male NPT Price: $6.05
SS-2-HN Hex Nipple, 1/8 in. Male NPT Price: $4.72
SS-2-HN.jpg
 
Last edited by a moderator:

Left C

Lifetime Members
Sep 26, 2005
2,500
1
36
69
Burlington, NC
Swagelok Stainless Steel 1/4" and 1/8" Pipe Fittings



Barbed Hose (Tubing) Fittings


SS-2-HC-1-2 1/8 in. Male NPT, 1/8 in. Hose ID Price: $5.64
SS-2-HC-1-4 1/4 in. Male NPT, 1/8 in. Hose ID Price: $8.61
SS-2-HC-1-2.jpg


SS-2-HC-7-2 1/8 in. Female NPT, 1/8 in. Hose ID Price: $12.71
SS-2-HC-7-4 1/4 in. Female NPT, 1/8 in. Hose ID Price: $14.35
SS-2-HC-7-2.jpg






Tubing Adapters

SS-4-TA-1-4 Male Tube Adapter, 1/4 in. Tube OD x 1/4 in. Male NPT Price: $6.05
SS-2-TA-1-2 Male Tube Adapter, 1/8 in. Tube OD x 1/8 in. Male NPT Price: $6.26
SS-4-TA-1-2 Male Tube Adapter, 1/4 in. Tube OD x 1/8 in. Male NPT Price: $5.54
SS-2-TA-1-4 Male Tube Adapter, 1/8 in. Tube OD x 1/4 in. Male NPT Price: $7.08
tubeadapter.jpg


SS-4-TA-7-4 Female Tube Adapter, 1/4 in. Tube OD x 1/4 in. Female NPT Price: $9.64
SS-2-TA-7-2 Female Tube Adapter, 1/8 in. Tube OD x 1/8 in. Female NPT Price: $7.69
SS-4-TA-7-2 Female Tube Adapter, 1/4 in. Tube OD x 1/8 in. Female NPT Price: $7.90
SS-2-TA-7-4 Female Tube Adapter, 1/8 in. Tube OD x 1/4 in. Female NPT Price: $9.02
femaletubefemaleNPT.jpg
 

Left C

Lifetime Members
Sep 26, 2005
2,500
1
36
69
Burlington, NC
eiginh;43385 said:
SWAGELOK STAINLESS STEEL FITTINGS
Do I need all this in order to use a Victor 253a-1993 with a clippard solenoid? I'm going stainless for the look...

Stainless Steel 1/4" MPT x 1/8" MPT Hex Reducing Nipple ( SS-4-HRN-2 ) $6.15


Stainless Steel 1/4" MPT x 1/8" FPT Reducer Bushing SS-4-RB-2 $5.74


Stainless Steel 1/8" MPT Hex Nipple ( SS-2-HN ) $4.72


Stainless Steel 1/4" MPT x 1/4" MPT Elbow SS-4-ME $14.05


Stainless Steel Tubing Connector, 1/8" MPT x 1/8" ID Tubing SS-2-HC-1-2 $5.64


Stainless Steel Tubing Connector, 1/8" FPT x 1/8" ID Tubing SS-2-HC-7-2 $12.71
A really simple design is to use:

- from regulator to solenoid: SS-4-HRN-2 Hex Reducing Nipple, 1/4 in. Male NPT x 1/8 in. Male NPT Price: $6.15

- Clippard solenoid (1/8" female ports)

- from solenoid to needle/metering valve: SS-2-HN Hex Nipple, 1/8 in. Male NPT Price: $4.72

- from needle/metering valve to 1/8" ID tubing: SS-2-HC-1-2 1/8 in. Male NPT, 1/8 in. Hose ID Price: $5.64


You will have something like either of these two with this simple design.
VTS253A-1993ClipparedSolenoidSwagel.jpg

VTS253A-1993ClippardSolenoidIdealMe.jpg
 

eiginh

Prolific Poster
Sep 17, 2009
38
0
6
I got the list from the pm you sent me on pt. Thanks for putting that out though! that really helps. Btw is the last post the recommendation for zip tieing the meter valve?
 

jonny_ftm

Guru Class Expert
Mar 5, 2009
821
2
16
Not a so good idea to mount that way, you loose the real benefit from Swagelok tubing adapters: no leaking fitting

here it is:



The circled part consists of:

B-6M0-1-2
B-12M0-1-8.jpg



B-6M5-4M
B-815-4.jpg



You get a leak free clean setup
 

jonny_ftm

Guru Class Expert
Mar 5, 2009
821
2
16
eiginh;43404 said:
Do you mean the zip tieing way is the bad way or what Left C suggested?

Both,

using the parts I mention you get a leak free setup and no torsion on the tubing while you lock the screw. Look their site for the way the locking is done. It's not easy to understand but very precise. You have to turn the screw 1 and 1/4 turn exactly
 

nipat

Guru Class Expert
May 23, 2009
665
0
16
Left C;43371 said:
Inlet pressure aids in sealing which is reduced as pressure decreases as well.

Ah, I think I see. For two stage regs, the increase of the pressure after the first stage
will aid in sealing at the second stage, clever.

Thanks.:)