Ferrules, Graphite Ferrules - ALL Sizes 1/6"  to 2.0"ID

FERRULES Chromalytic Technology  SHOP: Ferrules

Graphite Ferrules - made in Australia & the original “Big Deal” !

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Graphite Ferrules

Graphite-PolyImide Ferrules

Graphite Ferrules (Shiny Black) Subambient ->450C & > Higher

15% Graphite-Polyimide(Vespel
Matt-Black~325C long term

vespe lferrules

TeflonFerrules

100% Vespel Ferrules
 (Bown-Orange very hard) ~300C
brittle at low
Temp

Teflon Ferrules ( to ~ 225C ) but Note
> a flow transition at ~28C > problematic !
CTFE even Better ! ( or PFA? )

ideal for GC ! glass/Packed and fused silica Capillary Columns
but > can diffuse in air > at ultra High Vacuum eg GC/MS inlet / column outlet use ( but mainly of Any significance at Only ppM levels )
Graphite can shed shards of graphite powder as they can tend to fragment
( re reducing ferrules IF overtightened ) unless captured adequately in appropriately designed fitting
( a la”old” MS Jet Separator” problems etc ! )

 polyimide > various “subtle”
some thermal expansion effects !
& generally TOO Hard x for Glass / Ceramic tube use-age !

re > Hardness : (SS >> Brass ) >
100%Vespel > 15%Graphite/Vespel >> PEEK Teflon >>> Graphite Tick
 ( > malleable & reuseable with care ! 
> at lower cost ! )

for LC & HPLC PEEK and /or Teflon-like eg CTFE are recommended (back-order ? )
> for far better solvent compatability & extreme pressure
see our VICI-Valco-USA and VICI-AG(Jour) (Swiss)

NEW Collapsible” PEEK / CTFE   for 1/16 & 1/8” OD tubing ! 
( but with smaller ! ID Tubing of course !
> & they do NOT distort ! & with care R reusable !
Conical ferrules ? > obsolete ?
> tend to distort on over tightening . . .
and tend to stick in flat-bottom ports / of Valves and fittings etc
- to be use with appropriate VICI-Jour PPS 1/4-28 Fittings

Typical Ferrule Prices

*CTFE 2019 >2013 on indefinite back-order WW material shortage
> ASK ! Or use PEEK instead !

CTFE 1/16 Collaps/10-pk
PEEK
1/16 Collaps
also for 1/8” tube

CBL-1KF $68.00

PPS Nuts JR-55050 $39.00

CBL-1PK $68.00

Color “HEX” Caps JR-5508x-12 $15.00

CT > Chromatography Ferrules

Ferrules & Nuts-Chrom  :PIC Gallery  > GOOGLE SEARCH PIcs > PDF LINKs

 more ABOUT FERRULES 2014+ FlipPAGE5 More about Ferrules FLIP-HTML5 Price List 2016; (PDF) more PDFs 
Ferrules as used in the Chromtechs’ context . . .
Are leak-tight Pipe-fitting seals connecting Tube Fittings and various type of Tubing; SS, polymeric, glass ceramic , fused silica . . .  in capillary and larger GC Column sizes; the latter being “fragile” and will just not sustain compression by conventional metal ferrules ( “a la” Swagelok etc )

Metal ferrules normally used by “Fittings OEMs”
traditionally use metal (SS/Brass)
And with their obvious limitations !
It’s not even in their pecuniary interest to even make
OR re-sell Graphite Ferrules
Metal Once-off use ? - then you’re /they’re “buggared” !
Graphite Ferrules “slide-off” can be re-used many times
altho’ they do tend to be “captured’ in the Nut if over-tightened
> For some GC OEMs with fore-sight ( eg Fisons / Shimadzu) specify
metal-jacketed/sleeve versions & in specially designed fittings
> ASK !

Applications > include chromatography connections where gas-tight seals are essential both in positive pressure but also under high Vacuum such as GC/MS where the material used must be high purity and sustainable at up
to 450degC nowadays
Common sizes range from (1/32, 1/16, 1/8, 1/4”OD with IDs tube size
as small as 0.3mm up to 2.0”ID and larger for more exotic applications ? ASK!
          AS far as we know we are the ONLY OEM of GFs with IDs larger than 1/2”
                                                 . . . ANYWHERE !

In fact there are few OEMs who make GFS at all ! Most Suppliers are in fact Distributors ONLY ( such as Agilent, Thermo, Shimadzu etc and AT MANY TIMES THE PRICE

Graphite Ferrules see Graphite Ferrules (HTM)
   > by FAR are the most Universally applicable type !

& where the Metal Ferrules are just NOT Good Enough !

FITTINGS OEMs DON’T necessarily like us > as GFs are reusable
(with care) and easily slide off the tubing;
They are soft and malleable and deform to fit the shape of the fittings “internals” . . . and help to reduce dead-volume !
They also have similar co-effs of thermal expansion as metal and will not leak under temperature cycling
There are virtually NO practical temperature limits ( but >450C as constraints impose by current Gas Chromatography practices ) and up to >1800C
( in an inert atmosphere ! )

Pressure Limits are at customers discretion
( Straight>> Reducing Type ) >>100s psig size gas dependant
DONT USE with Hydrogen/Oxygen Air/ at High Temp
> 300c ?

 

 

Fittings & Ferrules(more!)

see Also >

Graphite Ferrules Graphite Ferrules htm-button

VICI-Valco > VICI-Vvalco htm-button

 VICI-AG (Jour)  > VICI-Jour htm-button

via Restek
PDF

 NEW Biotech (Upchurch) > Biotech htm-button

VICI Nuts-Ferrules

Discount on Standard GFs 1/16 to 1” IF Item Order > $400 less 15%

But ONLY IF Ordered ON-line thru’’ our SHOPPE >. Mals Cart

Restek Literature generally is updated regularly > OLDER material is kept for
“archive”?? Purposes - a Customer TECHNICAL Resource for U !
see 2009-10, 2011-22015-6 > Catalogs .but some items no longer available / superseded ! :  ASK !
Printed Catalogs  R NO LONGER AVAILABLE from Restek ! ( latest was 2015-16 ! > & here on-line ! )

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