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    • Flow Splitters
      • Fixed Flow Splitters
        • Post Column Application, Binary
        • Post Column Application, Multiport
      • Adjustable Flow Splitters
        • Post-Column Application
        • Pre-Column Application
      • Automated Flow Splitters
        • Pre-Column Application
      • Makeup-Flow Splitters
        • Adjustable Makeup-Flow Splitters
        • Fixed Makeup-Flow Splitters
      • Accessories
        • Adjustable Flow Splitter Accessories
        • Fixed Flow Splitter Accessories
        • Flow Measurement Kit
        • Makeup-Flow Splitter Accessories
    • Mixers
      • Static Mixers
        • Standard HPLC Static Mixer Development Kit
        • Standard HPLC Static Mixers
        • Ultra HPLC Static Mixers
        • High Temperature Static Mixers
        • Biocompatible PEEK Static Mixers
        • In-Line Combo Static Mixers
      • Dynamic Mixers
        • Binary
        • Ternary
    • Pumps
      • Syringe Pumps
        • Infusion Syringe Pump
        • High Pressure Syringe Pumps
        • Syringe Pump Replacement Parts
      • HPLC & UHPLC Pumps
        • Isocratic Model 541 Pumps
        • Model 540G Gradient Systems
      • 545 Star Prep Pumps
      • 546 Star Pilot Pumps
      • High Temperature Metering Pumps
        • Model 541 High Temperature Metering Pumps
        • Model 551 High Temperature Metering Pumps
    • Filters
      • UltraShield HPLC/UHPLC Precolumn Filters
        • 0.5 Micron Frits
        • 2 Micron Frits
        • Replacement Parts
      • ColumnShield HPLC FingerTight Precolumn Filters
        • 0.5 Micron Frits
        • 2 Micron Frits
      • In-line HPLC/UHPLC Precolumn Filters
        • 0.2 Micron Frits
        • 0.5 Micron Frits
        • 2 Micron Frits
        • 5 Micron Frits
      • Direct Connect HPLC/UHPLC Precolumn Filters
        • 0.2 Micron Frits
        • 0.5 Micron Frits
        • 2 Micron Frits
        • 5 Micron Frits
      • Precolumn Filter Replacement Filters
        • SST Frits
        • Titanium Frits
      • High Capacity In-Line Filters
      • In-Line Filters
      • Solvent Filters
    • Other ASI Products
      • Pulse Dampers
        • Standard HPLC Pulse Dampers
        • Rupture Proof Diaphragm Dampers
        • UHPLC Pulse Dampers
      • In-line Check Valves
        • Slim-Line 1/8" & 1/16" Ball Cartridge, HPLC/UHPLC
        • 3/16", 1/8" & 1/16" Ball Cartridge, HPLC/UHPLC/30K
        • High Temperature
        • SFC Application
        • Other port options
      • Direct Connect Guard Column HPLC/UHPLC Hardware
        • 5 mm Long Guard Column
        • 7 mm Long Guard Column
        • 10 mm Long Guard Column
        • 20 mm Long Guard Column
      • Post-Column Reactor Modules
        • Stainless Steel Post Column Reactors
        • Biocompatible Post-Column Reactors
      • Biolistic Supplies
        • Carrier Disc
        • Rupture Disc
        • Stopping Screen
        • Gold Particles
        • Tungsten Particles
      • Fittings & Unions
      • Metering Valves
    • Pump Replacement Parts
      • OEM Check Valves
      • ABI / Kratos
        • Spectaflow 400, 1400A, 1406A
      • Agilent
        • 1050, 1100, 1120, 1200, 1220/1260 Infinity
        • 1090
      • Alcott
        • 760, 765
      • ASI
        • Model 500, Micro Head
        • Model 500, Analytical Head
        • Model 500, Semi-prep Head
        • Model 500, Prep Head
        • Model 520 and 540, Micro Head
        • Model 520 and 540, Analytical Head
        • Model 520 and 540, Semi-prep Head
        • Model 520 and 540, Prep & Flash Chrome Head
        • Model 551 High Temperature Metering Pumps
      • Beckman
        • 100A, 110A, 110B
        • 112, 112M
        • 114, 114M, 116, 118, 125, 126, 127, 128
      • Bio-Rad
        • 1330, 1350
      • Bischoff
        • 2200, 2250
      • Chrompack
        • CP 5000
      • Dionex
        • P-580, P-680
        • GP-40
        • GP 50/IP25 Standard Bore
        • ICS-900, 1000, 1100, 1500, 1600, 2000, 2100, 3000
      • Eldex
        • A, AA, B, E
        • Optos 3 HM
      • ESA
        • Model 580, 582
      • Gilson / Rainin
        • 5SC, 5SS, 5TI
        • 10SC, 10SS, 10WSS, 10TI, 10WTI
        • 25SC, 25SS, 25WSS, 25TI, 25WTI
      • Hitachi
        • L2100, L2130
        • 655, L6000, L6200, L6200A
        • L7100
      • Jasco
        • PU-880, PU-980
        • BIP-1
        • PU-1500, 2000 (xx80, xx86, xx87, xx89)
      • Knauer
        • K-100, K-120, K-500, K-501, K-1000, K-1001
      • Lab Alliance
        • Prep 24, 100
      • LDC / Milton Roy
        • Analytical
      • LKB
        • 2150
      • Perkin-Elmer
        • 1, 2, 3, 3B
        • Series 10
        • Series 4,200,400,410,620,Model 250,Integral 4000
      • Shimadzu
        • LC-10AD
        • LC-10ADvp
        • LC-10AS
        • LC-10AT
        • LC-10ATvp
        • LC-20AB
        • LC-20AD
        • LC-20ADXR
        • LC-20AT
        • LC-30ADSF
        • LC-40D/40DXR/40BXR
        • LC-2010
        • LC-6A
        • LC-7A
        • LC-8A
        • LC-600, LC-9A
        • Nexera-i (LC-2040/2040C)
        • Prominence-i (LC-2030/2030C)
        • Prominence System
        • left
      • SSI
        • 200, 220, 222, 300, 350 SS
        • Accuflow Series 1, 2, 3, 4 PEEK
        • Accuflow Series 1, 2, 3, 4 SS
      • Teledyne Isco
        • Swagelok, Analytical, Analytical Inert, Vari Pump
      • ThermoFisher
        • Spectra-Physics 8100, 8800, 8810, IsoChrom
        • Spectra-Physics 8700
        • TSP SpectraSYSTEM P100, P1000/2000/3000/4000
        • TSP SpectraSYSTEM 3200 Constametric
      • Varian
        • 2010, 2510
        • 5000, 5020, 5060, 5500, 5560
        • Star 9010, 9012, 9020, ProStar 220, 230, 240
        • Prostar 210, 215 / Rainin SD200, SD300
        • PrepStar SD-1 200, 500 & 800 mL/min.
        • 212 LC
      • Waters
        • 616 SS
        • 625, 626 PEEK
        • Alliance Model 2690, 2695, 2790, 2795, 2796
        • M45, 45G
        • M501
        • M510,515,590,1515,1525 Analytical,6000,6000A,LCM1
        • 600, 600E, 610
        • Extended Flow 225 µL Head #3 M510 EF, 590 EF
        • Extended Flow 225 µL Head #3 M600 EF, 600E EF
        • Acquity UPLC
      • YL
        • YL 9100, 9300

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    CATEGORIES

      • OEM Check Valves
      • ABI / Kratos
        • Spectaflow 400, 1400A, 1406A
      • Agilent
        • 1050, 1100, 1120, 1200, 1220/1260 Infinity
        • 1090
      • Alcott
        • 760, 765
      • ASI
        • Model 500, Micro Head
        • Model 500, Analytical Head
        • Model 500, Semi-prep Head
        • Model 500, Prep Head
        • Model 520 and 540, Micro Head
        • Model 520 and 540, Analytical Head
        • Model 520 and 540, Semi-prep Head
        • Model 520 and 540, Prep & Flash Chrome Head
        • Model 551 High Temperature Metering Pumps
      • Beckman
        • 100A, 110A, 110B
        • 112, 112M
        • 114, 114M, 116, 118, 125, 126, 127, 128
      • Bio-Rad
        • 1330, 1350
      • Bischoff
        • 2200, 2250
      • Chrompack
        • CP 5000
      • Dionex
        • P-580, P-680
        • GP-40
        • GP 50/IP25 Standard Bore
        • ICS-900, 1000, 1100, 1500, 1600, 2000, 2100, 3000
      • Eldex
        • A, AA, B, E
        • Optos 3 HM
      • ESA
        • Model 580, 582
      • Gilson / Rainin
        • 5SC, 5SS, 5TI
        • 10SC, 10SS, 10WSS, 10TI, 10WTI
        • 25SC, 25SS, 25WSS, 25TI, 25WTI
      • Hitachi
        • L2100, L2130
        • 655, L6000, L6200, L6200A
        • L7100
      • Jasco
        • PU-880, PU-980
        • BIP-1
        • PU-1500, 2000 (xx80, xx86, xx87, xx89)
      • Knauer
        • K-100, K-120, K-500, K-501, K-1000, K-1001
      • Lab Alliance
        • Prep 24, 100
      • LDC / Milton Roy
        • Analytical
      • LKB
        • 2150
      • Perkin-Elmer
        • 1, 2, 3, 3B
        • Series 10
        • Series 4,200,400,410,620,Model 250,Integral 4000
      • Shimadzu
        • LC-10AD
        • LC-10ADvp
        • LC-10AS
        • LC-10AT
        • LC-10ATvp
        • LC-20AB
        • LC-20AD
        • LC-20ADXR
        • LC-20AT
        • LC-30ADSF
        • LC-40D/40DXR/40BXR
        • LC-2010
        • LC-6A
        • LC-7A
        • LC-8A
        • LC-600, LC-9A
        • Nexera-i (LC-2040/2040C)
        • Prominence-i (LC-2030/2030C)
        • Prominence System
        • left
      • SSI
        • 200, 220, 222, 300, 350 SS
        • Accuflow Series 1, 2, 3, 4 PEEK
        • Accuflow Series 1, 2, 3, 4 SS
      • Teledyne Isco
        • Swagelok, Analytical, Analytical Inert, Vari Pump
      • ThermoFisher
        • Spectra-Physics 8100, 8800, 8810, IsoChrom
        • Spectra-Physics 8700
        • TSP SpectraSYSTEM P100, P1000/2000/3000/4000
        • TSP SpectraSYSTEM 3200 Constametric
      • Varian
        • 2010, 2510
        • 5000, 5020, 5060, 5500, 5560
        • Star 9010, 9012, 9020, ProStar 220, 230, 240
        • Prostar 210, 215 / Rainin SD200, SD300
        • PrepStar SD-1 200, 500 & 800 mL/min.
        • 212 LC
      • Waters
        • 616 SS
        • 625, 626 PEEK
        • Alliance Model 2690, 2695, 2790, 2795, 2796
        • M45, 45G
        • M501
        • M510,515,590,1515,1525 Analytical,6000,6000A,LCM1
        • 600, 600E, 610
        • Extended Flow 225 µL Head #3 M510 EF, 590 EF
        • Extended Flow 225 µL Head #3 M600 EF, 600E EF
        • Acquity UPLC
      • YL
        • YL 9100, 9300
    Replacement O-ring for Purge Valve Knob Assembly, ASI Model 540 Biocompatible PEEK Heads
    View Product
    Replacement O-ring for Purge Valve Knob Assembly, ASI Model 540 Biocompatible PEEK Heads
    540-2012-1
    1 2
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            • Post Column Application, Binary
            • Post Column Application, Binary
            • Analytical Inlet Flow Range: 0.1 - 5 mL/min.
            • Semi-Preparative Inlet Flow Range: 5 - 40 mL/min.
            • Preparative Inlet Flow Range: 30 - 200 mL/min.
            • Hi-Preparative Inlet Flow Range: 200-1,000 mL/min
          • Post Column Application, Multiport
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          • Adjustable Flow Splitters
          • Adjustable Flow Splitters
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            • Post-Column Application
            • Post-Column Application
            • Nano Flow Splitters
            • Analytical Inlet Flow Range: 0.25 - 5 mL/min.
            • Semi-Preparative Inlet Flow Range: 5 - 40 mL/min.
            • Preparative Inlet Flow Range: 40 - 1,000 mL/min.
          • Pre-Column Applicationdropdown_arrow
            • Pre-Column Application
            • Pre-Column Application
            • Analytical Inlet Flow Range: 0.25 - 1 mL/min.
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            • Fixed Prep Inlet Flow and Variable Split Flow
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          • Fixed Makeup-Flow Splittersdropdown_arrow
            • Fixed Makeup-Flow Splitters
            • Fixed Makeup-Flow Splitters
            • Prep Inlet Flow Range: 1 - 5 mL/min.
            • Prep Inlet Flow Range: 5 - 10 mL/min.
            • Prep Inlet Flow Range: 10 - 20 mL/min.
            • Prep Inlet Flow Range: 20 - 50 mL/min.
            • Prep Inlet Flow Range: 50 - 150 mL/min.
            • Prep Inlet Flow: Custom
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            • Standard HPLC Static Mixer Development Kit
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            • Biocompatible PEEK 2,500 - 3,000 PSI
          • Standard HPLC Static Mixersdropdown_arrow
            • Standard HPLC Static Mixers
            • Standard HPLC Static Mixers
            • Micro Flow Series (0.5 µL - 25 µL)
            • Low Flow Series (50 µL - 250 µL)
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            • Prep Flow Series (3.0 mL - 15 mL)
            • In-Line Mixer Stainless Steel Housing
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            • Ultra HPLC Static Mixers
            • Ultra HPLC Static Mixers
            • Micro Flow Series (0.5 µL - 25 µL)
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            • High Temperature Static Mixers
            • High Temperature Static Mixers
            • Micro Flow Series (0.5 µL - 25 µL)
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            • High Flow Series (800 µL - 1.50 mL)
            • Prep Flow Series (3.0 mL - 15 mL)
          • Biocompatible PEEK Static Mixersdropdown_arrow
            • Biocompatible PEEK Static Mixers
            • Biocompatible PEEK Static Mixers
            • Micro Flow Series (0.5 µL - 25 µL)
            • Low Flow Series (50 µL - 250 µL)
            • Analytical Flow Series (350 µL - 500 µL)
            • High Flow Series (800 µL - 1.50 mL)
            • In-Line Mixer Biocompatible PEEK Housing
            • Binary Tee Mixer Biocompatible PEEK Housing
            • Ternary Tee Mixer Biocompatible PEEK Housing
          • In-Line Combo Static Mixersdropdown_arrow
            • In-Line Combo Static Mixers
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            • Isocratic Model 541 Pumps
            • Isocratic Model 541 Pumps
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            • SFC Application
            • Stainless Steel Heads
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          • Model 540G Gradient Systemsdropdown_arrow
            • Model 540G Gradient Systems
            • Model 540G Gradient Systems
            • Biocompatible PEEK Heads
            • Stainless Steel Heads
            • Titanium Heads
        • 545 Star Prep Pumps
        • 546 Star Pilot Pumps
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          • Model 541 High Temperature Metering Pumps
          • Model 551 High Temperature Metering Pumps
      • Filtersdropdown_arrow
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          • UltraShield HPLC/UHPLC Precolumn Filters
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          • 2 Micron Frits
          • Replacement Parts
        • ColumnShield HPLC FingerTight Precolumn Filtersdropdown_arrow
          • ColumnShield HPLC FingerTight Precolumn Filters
          • ColumnShield HPLC FingerTight Precolumn Filters
          • 0.5 Micron Frits
          • 2 Micron Frits
        • In-line HPLC/UHPLC Precolumn Filtersdropdown_arrow
          • In-line HPLC/UHPLC Precolumn Filters
          • In-line HPLC/UHPLC Precolumn Filters
          • 0.2 Micron Frits
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          • 2 Micron Frits
          • 5 Micron Frits
        • Direct Connect HPLC/UHPLC Precolumn Filtersdropdown_arrow
          • Direct Connect HPLC/UHPLC Precolumn Filters
          • Direct Connect HPLC/UHPLC Precolumn Filters
          • 0.2 Micron Frits
          • 0.5 Micron Frits
          • 2 Micron Frits
          • 5 Micron Frits
        • Precolumn Filter Replacement Filtersdropdown_arrow
          • Precolumn Filter Replacement Filters
          • Precolumn Filter Replacement Filters
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        • Solvent Filters
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          • In-line Check Valves
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          • Slim-Line 1/8" & 1/16" Ball Cartridge, HPLC/UHPLC
          • 3/16", 1/8" & 1/16" Ball Cartridge, HPLC/UHPLC/30K
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        • Direct Connect Guard Column HPLC/UHPLC Hardwaredropdown_arrow
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          • 1090
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          • 760, 765
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          • Model 500, Micro Head
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          • Model 500, Prep Head
          • Model 520 and 540, Micro Head
          • Model 520 and 540, Analytical Head
          • Model 520 and 540, Semi-prep Head
          • Model 520 and 540, Prep & Flash Chrome Head
          • Model 551 High Temperature Metering Pumps
        • Beckmandropdown_arrow
          • Beckman
          • Beckman
          • 100A, 110A, 110B
          • 112, 112M
          • 114, 114M, 116, 118, 125, 126, 127, 128
        • Bio-Raddropdown_arrow
          • Bio-Rad
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          • 1330, 1350
        • Bischoffdropdown_arrow
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        • Chrompackdropdown_arrow
          • Chrompack
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          • CP 5000
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          • Dionex
          • Dionex
          • P-580, P-680
          • GP-40
          • GP 50/IP25 Standard Bore
          • ICS-900, 1000, 1100, 1500, 1600, 2000, 2100, 3000
        • Eldexdropdown_arrow
          • Eldex
          • Eldex
          • A, AA, B, E
          • Optos 3 HM
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          • ESA
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          • Model 580, 582
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          • 10SC, 10SS, 10WSS, 10TI, 10WTI
          • 25SC, 25SS, 25WSS, 25TI, 25WTI
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          • Hitachi
          • L2100, L2130
          • 655, L6000, L6200, L6200A
          • L7100
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          • PU-880, PU-980
          • BIP-1
          • PU-1500, 2000 (xx80, xx86, xx87, xx89)
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          • K-100, K-120, K-500, K-501, K-1000, K-1001
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          • Prep 24, 100
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        • LKBdropdown_arrow
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          • Series 10
          • Series 4,200,400,410,620,Model 250,Integral 4000
        • Shimadzudropdown_arrow
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          • LC-10AD
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          • LC-40D/40DXR/40BXR
          • LC-2010
          • LC-6A
          • LC-7A
          • LC-8A
          • LC-600, LC-9A
          • Nexera-i (LC-2040/2040C)
          • Prominence-i (LC-2030/2030C)
          • Prominence System
          • left
        • SSIdropdown_arrow
          • SSI
          • SSI
          • 200, 220, 222, 300, 350 SS
          • Accuflow Series 1, 2, 3, 4 PEEK
          • Accuflow Series 1, 2, 3, 4 SS
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          • Swagelok, Analytical, Analytical Inert, Vari Pump
        • ThermoFisherdropdown_arrow
          • ThermoFisher
          • ThermoFisher
          • Spectra-Physics 8100, 8800, 8810, IsoChrom
          • Spectra-Physics 8700
          • TSP SpectraSYSTEM P100, P1000/2000/3000/4000
          • TSP SpectraSYSTEM 3200 Constametric
        • Variandropdown_arrow
          • Varian
          • Varian
          • 2010, 2510
          • 5000, 5020, 5060, 5500, 5560
          • Star 9010, 9012, 9020, ProStar 220, 230, 240
          • Prostar 210, 215 / Rainin SD200, SD300
          • PrepStar SD-1 200, 500 & 800 mL/min.
          • 212 LC
        • Watersdropdown_arrow
          • Waters
          • Waters
          • 616 SS
          • 625, 626 PEEK
          • Alliance Model 2690, 2695, 2790, 2795, 2796
          • M45, 45G
          • M501
          • M510,515,590,1515,1525 Analytical,6000,6000A,LCM1
          • 600, 600E, 610
          • Extended Flow 225 µL Head #3 M510 EF, 590 EF
          • Extended Flow 225 µL Head #3 M600 EF, 600E EF
          • Acquity UPLC
        • YLdropdown_arrow
          • YL
          • YL
          • YL 9100, 9300
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