valve selection
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Valco InjectorsandValves forGC
pages96–99,102–111
Fornearly40yearsValcovalveshavebeen the industrystandard ingaschromato
graphy. Modelsareavailablewith3,4,6,8,10,12,or 14ports,with1/32",1/16",
1/8",or 1/4"fittings,andwithbore sizes from0.25mm (.010") to4mm (.156").
Inaddition,Valcovalvesoffer thewidest rangeof rotor andbodymaterialsof any
valveavailable,withalloysandpolymer composites capableofmeetingvirtually
any system requirement. Allmodels canbeordered inmanual,pneumatic,or
electricallyactuatedversions.
Valco InjectorsandValves forHPLC
pages96–99,112–116
Apioneer and industry leader inproducts forHPLC,Valcocontinues tooffer the
market’smostdiverse line in termsof numberofports,fitting sizes,materialsof
construction,andactuation. 3,4,6,8,10,12port versionsareoffered,with1/32",
1/16",or 1/8"fittings. Aswith theGC line,Valcovalvesoffer thewidest range
of rotor andbodymaterialsof anyvalvesavailable,withalloysandpolymer
composites capableofmeetingvirtuallyany system requirement. Allmodels
canbeordered inmanual,pneumatic,or electricallyactuatedversions.
ValcoSelectors
pages100–101,122–133
One inherentbenefitof theValcoconical rotarydesign is that it allowsmultiple
planesofports, facilitatingavarietyof uniquemultipositionconfigurations
useful for stream selection,column selection,or trapping. Versionsareavailable
forGCandHPLCapplications,with1/16",1/8",or 1/4"fittings,withbore sizes
from0.40 to4.0mm (.016" to .156"). Selectorsareavailable forup to16 streams
(34ports),allwithValco’s trademarkflexibility in termsof actuationandmaterial
options.
DiaphragmValves forGC
pages140–143
Adiaphragmvalveconsistsofplungersandportsarranged inacircular
pattern,with theplungers controlledby the reciprocatingactionof twoair
actuatedpistons. Extremely long lifetime (typically1,000,000cyclesat ambient
temperature;approximately500,000cyclesat elevated temperatures),very short
actuation time (10milliseconds),minimum internal deadvolume,and reliability
havemade this typeof valvevery successful inprocessgas chromatography for
both sample injectionandcolumn switching. Ourminiatureversion features
1/16"or 1/32" zerodeadvolumefittings,and is thefirst tooffer a10port
configuration inaddition to the6port and internal sample4portmodels.
ValveSelection
Following isanoverviewof themany typesof valvesavailable fromVICI.
CHROMalyticTECHnologyPtyLtdAUSTRALIANDistributors e-mail:
: 03 97622034
