VICI M50 - Chemical Compatibility of Wetted Surfaces; Model M6

18
Chemical Compatibility of Wetted Surfaces
To ensure best results, please consider the chemical
compatibility of the wetted surfaces with the liquids to
be used before putting the pump into service.
Model M6
PTFE
ThepistontipsaremadefromPTFE.Polytetrauoroethyleneisthegeneric
name for the class of materials such as Teflon
®
. It offers superior chemical
resistanceandlendsitselftogoodsealingcharacteristics.Becauseit’sso
easy to handle, it is often used in low pressure situations such as the M6
pump.CompoundsoflowmolecularweightcanpermeatePTFE.
PAEK
ThepumpportendcapismadeofaPAEK-basedcomposite.
Polyaryletherketoneisthegenericnameforthefamilyofpolyketonecom-
pounds.PAEKincludesPEK,PEEK,PEKK,andPEKEKK,whichdifferin
physical properties and, to a lesser degree, in inertness. This composite
usedintheM6resistsallcommonHPLCsolventsanddiluteacidsand
bases. However, concentrated or prolonged use of halogenated solvents
may cause the polymer to swell. Avoid concentrated sulfuric or nitric acids
(over10%)andrefertotheguidelinesonthenextpage.
Valcon P
TheM6pumprotorismadefromValconP.ThisPTFE/carboncompositeis
employedasarotormaterialinmanyValcovalves,soithasseenextensive
useinmanyanalyticalapplications.Itisroutinelyusedat1000psi/75°C,
andcanalsobeusedattemperaturesapproaching200°Cwithdecreased
sealing tension.
Sapphire
The M6 piston chambers are made of sapphire and are sealed in place
withaViton
®
O-ring. Sapphire has a unique set of properties including
high strength, hardness, surface smoothness, and excellent chemical
compatibility. It is commonly used in applications where a combination
of exceptional mechanical and chemical properties is essential.
Viton
®
Viton
®
O-rings are used to seal the sapphire pistons. Besides its excellent
mechanicalproperties,Viton
®
provides the best proven fluid and chemical
resistance of any commercial non-fluorinated elastomer. NOTE: Viton
®
is
not compatible with THF and acetone. Use of these substances will cause
premature O-ring failure, which can lead to additional pump damage.
Teflon
®
isaregisteredtrademarkofE.I.duPontdeNemours.
Viton
®
isaregisteredtrademarkofDuPontDowElastomers.