BackPressureRegulators (BPRs)
XX
Provenoutgassingprotection
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Flow-independent pumppreload for greater pumpefficiency
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5 to1,000psi cartridges and assemblies available
BackPressureRegulatorsaredesigned toenhancesystemperformance
throughoutgassingpreventionandimprovedpumpcheckvalveefficiency.
UpchurchScientific
®
backpressure regulators include:
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5 and 20psi assemblies (replacement cartridges not available)
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40, 75, 100, 250, 500, 750, and 1,000psi cartridges and assemblies
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PEEK and stainless steel BPRholders
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Highpressure adjustableBPR for pressures between
2,000 and 5,000psi
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Ultra low volumeBPRs set to100 and 500psi (page 154)
ForflowcontroloptionstrytheMicro-MeteringValvesfoundonpage147.
BPRAssemblies
Choose from our line of Biocompatible and Stainless Steel BPR
Assemblies,eachcompletewithareplaceable, factorypresetcartridge
(except the5and20psi versions).
Upchurch Scientific BPR Assemblies create incremental back
pressuresranging from5to1,000psi (0.3to69bar).TheBiocompatible
BPR Assemblies feature a PEEK holder; polymer-based fittings;
biocompatibleBPRcartridges andwrenches for tightening. Stainless
SteelBPRAssemblies feature thesamebiocompatibleBPRcartridges
witha316 stainless steel holder andpolymer fittings.
BiocompatibleBackPressureRegulatorHolder, shownwithavailableCartridges
U-609
500psi BPR
shownwithP-765Cartridge
P-790
5psi BPR
(soldasassemblyonly)
EachBPRAssembly includes
apresetBPRCartridgeand
UpchurchScientificfittings
for 1/16”OD tubing.
APPLICATIONNOTE
Small gasbubblesoften formas solventmoves from thehighpressure
of anHPLCcolumn to the lowpressureenvironment leading to the
detector. Thisoutgassingcancauseerraticbaseline readingsand lossof
sensitivity. PlacinganUpchurchScientificBPR (usuallya40–100psi) after
thedetector providesanexcellent, low-costmethod for reducing this
problembymaintainingenoughbackpressureon themobilephase to
keepgasesdissolved in solution.
Abackpressure regulator canalsobeusedasapumppreload for low
andfluctuatingpressureapplications.Manyof today’spumps requirea
steadybackpressure to functionproperly. Install anUpchurchScientific
BPR (usually500–1,000psi) between thepumpand the injector to
enhancepumpperformance.
Caution:Donotexceed themaximumoperatingpressureof your system—
please refer to theoperatingmanuals for your systemcomponentsbefore
choosing theappropriateBPR.
0.43”
(1.09cm)
1.04”
(2.64cm)
1.90”
(4.83cm)
1.92”
(4.88cm)
0.42”
(1.07cm)
Flangeless Ferrule
CartridgeHolder
Cartridge
Color-CodedEndCap
FlangelessNut
152
CHECKVALVES&
PRESSUREREGULATORS
Back PressureRegulators
