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” !

Graphite Ferrules

Graphite-PolyImide Ferrules

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

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

vespe lferrules

TeflonFerrules

100% Vespel Ferrules
 ( Bown-Orange & very hard ) ~> 300C,
> but brittle at sub-ambient > low temp

 Teflon Ferrules ( to~ 225C ) but Note >flow transition  at ~28C >
CTFE even Better !

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
at Only ppM levels )
Graphite can shed shards of graphire poweder as they can tend to fragment unless captured adequately in fittings a la” MS Jet Separator” problems etc !

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

Hardness : 100%Vespel
> 15%Graphite/Vespel> Teflon >> Graphite ( & malleable )

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

NEW Collapsible PEEK / CTFE(Kel-F) Ferrules for 1/16
( and smaller) and 1/8”OD tubing ! > & do NOT distort !
Conical ferrules ? > obsolete ? > tend to stick
in flat-bottom ports / Valves and fittings etc

CT > Chromatography Ferrules
[Ferrules] [Ferrules-m4] [Ferrules-m5] [Graphite Ferrules] [Graphite Ferrules-m4] [Graphite Ferrules-m5] [Large GFs-m5]
-m4

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

 more ABOUT FERRULES 2014+ FlipPAGE5 More about Ferrules FLIP-HTML5 Price List 2016; (PDF)  
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 tube size IDs 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” ( NOW any Size up to 2” ID )
                                                                  . . . 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 OFTEN AT MANY TIMES THE PRICE

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

& where the Metal Ferrules > are often just NOT Good Enough ! re overtightening > distortion of
both  ferrule & fittings !

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 temperaure 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-Jour htm-button

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

via Restek
PDF

 NEW > Biotech htm-button Biotech (Upchurch)

for LC & HPLC PEEK and /or Teflon-like eg CTFE are recommended
> 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 !  ( and 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
due to WW material shortage
> ASK ! Or use PEEK instead !

CTFE 1/16 Coll./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

VICI Nuts-Ferrules

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