CHROMTECH :  Specialists in Chromatography
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Some OEM Products ( File-prefiX > “ X “ s > “ 404 Error ”  have been “ Archived “
Manual PDFs are still available ! for reference ONLY > but ASK ! as we may offer ALTs /

Large Graphite Ferrules > PDF

Standard

> Swagelok SPECS re DIMS generally
Imperial ( 100=1/16” ) & Metric ( -M_ _ )

Customised

 SFOD-ID-L-SL-G ( “ +detail ? ” )
> -ConeAngle(17deg >Swagelok) ,-ConeTip Thickness (IF required ! ) > All sizes are in mm ( unless “ Inch otherwise specified )

for OPTIMUM Performance > Use OUR recommended SPECs > as many compromises are possible
ELSE > a DISCLAIMER !
NOT ALL Your wishes are necessarily Practical ! either !

Standard > Swagelok Fittings ( typical DIMs )
> other OEM “copies” may NOT be identical re ALL ( “exact” ) DIMs

Imperial (in)

Metric (mm)

where “100”

=1/16 ”

Actual OD

/L

/SL

ActualOD

/L

/SL

SF400PI

1/4”I D

0.373

0.283

0.110

SF400G

0.384

0.268

0.120

SF600G

3/8” ID

SF400/M6G

SF800G

1/2”

SFM8G

SF1000G

5/16”

SFM10.6G

17.8

SF1200G

3/4”

SFM12G

SF1400G

7/8”

1.15

0.40
(11.27)

0.18

SFM14G

SF1600G

1.0”

31.9mm
1.25”

10.8
0.39”

4.8mm
0.18”

SFM16G

SF2000G

1-1/4”

1.475

0.55

0.26

SFM20G

SF2400G

1-1/2”

1.87

0.79

0.40
(0.06”)

SFM25G

30.0

10.2

4.9

SF2800G

1-3/4”

SFM28B

SF3000G

1-7/8”

SFM32G

42.18
31.93

18.62

SF3200G

2.0”

2.56

1.05

0.30(0.07)
>

see pic >
more details

to be confirmed

SF2.56/2.00/1.05/0.30/(0.07)-G

+/- Tolerance

+0.002”

-0.002”

0.005”

0.005”

NO Tooling Costs Apply for “Standard” Ferrules . . . 
> OR NON-Standard “negotiable”  !
> with YOUR Fitting sample & DIMS provided > but depending on difficulty !

• Graphite Ferrules are UNIQUE

• Soft > Malleable squash into Shape > in-situ !

• DISCLAIMER > over-ride
  Thread & Inner profile of NUT invariably results in extrusion of the Graphite into the threads etc > some applications the ferrules may be marginally COMPROMISED re compression Density !

• ASK > for recommendations in these “extreme” situations !

• NOT All DIMS are in fact feasible

• Custom Tooling : Small <1/2”ID $100; Large >1/2” - 2”ID $150 - IF required ? > ASK !

• Limitations > Size vs Wall thickness vs Length

• Graphite Ferrules are NOT machine as such \

• > Soft / Malleabe & CAN be squashed in-situ into shape ( but marginally ? > by a few “thous” w/o losing integrity )

• BUT High Compression Moulding in a Tooling “Die Ste”
  Extree Pressues used ( but Graphite is “elastic”) and the laminated format whilst a good compromise can still result in infusion leaks under high vacuum minimised by high torque tightening in a “truly captured” fitting format !

• ALWAYS TRIAL TEST RE- SAFETY ! > & Can be highly APP DEPENDENT !
  re temperature and Pressure > Graphite has a LOW co-eff of friction !
  RE Supporting extreme weights in a Vertical position > Tube may tend to “slide” > out !
  > an EXTREME situation > TEST Safely . . . but Be-A-Ware !

NOTE : CHROMTECH is the ONLY known OEM of these
Large Graphite Ferrules !

AND the “prime” Inventor of GFs for Chromatogtaphy Use ! ( from > ‘60s+ )
& the source of Many OEM “copycats” since !

some
APPS

• General Purpose Ferrules -

• Replaceable ( slides OFF! ), ( cost savings ! > eg for protypes & re-usable ! )

• Reducing Ferrule Apps ( compared to expensive metal fittings )

• Mainly Low(er) Pressure ! ( <<1000psi depending on size ? )

• HIgh Temperature APPS >1000C in inert atmosphere ( furnace tubes )

• Gas Chromatography Columns, Inlet Liners

• Glass / Ceramic ( Catalyst )Tubes  > eg Gas Generators

• HighTemp Spectra Cells “ Glass / Quartz { for  eg IR, FTIR
  ( higher VOCs >~C20 ))

• -    where Size DIMs eg OD are far more critical to fit & seal !

In Fact

The UNIVERSAL Ferrule for many APPS
SOFT & Malleable material NOT Amorphous !
 where normal metal Ferrules are Useless
> & tend to break or distort glass, ceramic > metal tubing !

whats-more ! with care the GFs can be reused ! > & simply slide-off the tube

> leave the GF inside the “nut” > thet do NOT require any metal “backing” ferrule ! . . . except for 1.5, 1.75, 2.0”ID where backing ferrule is required ( and uses less graphite to make ! )

Small GFs : Ferrules in General
SHOP Cart Ferrules
MalsCart > some Ferrules
also this Site >
 * https://www.chromtech.net.au/
chrom-ferrules-ct.htm

Large GFs PDF
GF Spec Data Sheet PDF
PDF Ferrules List
FlipHTML5 Ferrules
* ALT SHOP GFs

Large GFs >10mm

* Custom Tooling Cost >
( <10mm ID) $75 )
10-25mm ID $150
25--50mm $195
“once-off” charge if the size NOT already an in- stock item !

We will ask firm order(er)s to specify / verify the exact DIMs preferred and
We THEN Supply OUR  nearest “suitable” re OD /L /SL / ( “Tip” strengthened re fragility ! where necessary ! )
> else a Tooling Cost Applies
INSUFFICIENT Details THEN
> NO Order will be processed !

* YOUR Inaccuracies ?
> NO Returns accepted !

> THE Perfect “Universal“ Ferrule material !
& proven over 40 years since we first adopted IT

IF U happen to Find Anything better ? > TELL US !
as we are always interested in NEW > Innovative Ideas !

We Welcome YOUR  e-Mail : > Response
. . . but YOUR Feedback is also welcome !

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