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

temps15% Graphite-Polyimide(Vespel Matt Black~325C long term

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

Teflon Ferrules ( to~ 225C ) but Note >f low 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” thermal expansion effects !
& generally TOO Hard x for Glass / Ceramic tube use-age !

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