146
VALVES
Micro-SplitterValves
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For interfacing LC-MS systems
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Adjustable split stream flow rates
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Versions for up to 800psi (55bar) andup to 4,000psi (276bar)
TheUpchurchScientific
®
lineofMicro-Splitter Valves is designed to
accuratelysplitandcontrola low-flowstreamoffasingle incomingsupply.
Choosebetween1/4-28flat-bottomand10-32conedthreadedversions.
TheHigh PressureMicro-Splitter Valves are designed to operate
successfully up to4,000psi (276bar) and the standardMicro-Splitter
valves arepressure rated to800psi (55bar).
TheGraduated Valve offersmany of the benefits and features of
Micro-Splitter Valves, plus the ability to adjust and set the split flow
to repeatablesettings.Thisallowsdocumentationof settingsand the
resultingflow rates foreasiermethoddevelopment. Thegraduations
alsomake iteasier toemploy thevalve inasystemused to runmultiple
analyses that requiredifferent split flow rates.
PartNo. Description
Includes
MICRO-SPLITTERVALVES
P-450
Standard, 1/4-28, Biocompatible
(3) XP-235
P-451
Standard, 10-32, Biocompatible
(3) F-120
P-460S
HighPressure, 10-32, withStainless Steel Needle
(3) F-120
P-460T
HighPressure, 10-32, withTitaniumNeedle
(3) F-120
GRADUATEDMICRO-SPLITTERVALVES
P-470
HighPressureGraduated, 10-32,
withStainless Steel Needle
(3) F-120
*Usewith theMicroTight TubingSleeves, foundonpage19.
APPLICATIONNOTE
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With an incoming flow rateof 1mL/minusing room temperature
water andequal pressures onbothoutlet lines, theminimum split
flow rate is 2µL/min for the standardmicro-splitter valves and
4.8µL/min for thehighpressuremicro-splitter valves.
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AllMicro-SplitterValveshavebeen testedatflow rates to100mL/min,
with amaximum resultingpressuredropof only 45psi (3.1bar)
when the valve is fullyopened.
PartNo. ValveType
Threads
Internal Volume
1
(closed/fullyopen)
Max.Operating
Pressure
P-450
Standard
1/4-28
2.1 / 4.1µL
800psi (55bar)
P-451
Standard
10-32
1.2 / 2.8µL
800psi (55bar)
P-460S, T
HighPressure
10-32
1.2 / 2.8µL
4,000psi (276bar)
P-470
HighPres. Graduated 10-32
1.2 / 2.8µL
4,000psi (276bar)
1
The supplyandwasteport thru-holeshave IDsof 0.020” (0.50mm). The ID for the split-streamport
thru-hole is0.020” (0.50mm) in standardversions; incapillaryversions it is0.010” (0.25mm).
SPECIFICATIONS&DETAILS
P-450
P-470
Thumbscrew
1.40”
(3.56 cm)
P-451
Standard
Micro-Splitter Valve
Micro-Splitter Valves
