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Check valves

In critical fluid paths, controlling flow direction and flow rate is essential. IDEX Health & Science offers a wide range of check valves and control valves that prevent backflow and protect delicate equipment. That is why these components are the standard in HPLC, diagnostics and microfluidics.

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21 products visible
Check valves
P-696 - Quick Stop Luer Check Valve Assembly
Check valves
P-697 - Quick Stop Luer Check Valve
Check valves
P-698 - Bulkhead Quick Stop Luer Check Valve Assembly
Check valves
P-699 - Bulkhead Quick Stop Luer Check Valve
Check valves
CV-3000 - Check Valve Inline Assembly With Fittings
Check valves
CV-3000NF - Check Valve Inline Assembly Without Fittings
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Check valves
CV-3001 - Check Valve Inline Cartridge 1.5 psi
Check valves
CV-3010 - Check Valve Inline Assembly 3 psi
Check valves
CV-3011 - Check Valve Inline Cartridge 3 psi
Check valves
CV-3301 - Check Valve Inlet 1/4-28 Male x 1/4-28 Female
Check valves
CV-3302 - Check Valve Outlet Assembly 1/4-28 Male to 1/4-28 Female
Check valves
CV-3310 - Check Valve Inline Cartridge 3 psi
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Check valves
CV-3315 - Check Valve Inlet Assembly 3 psi 1/4-28 .020
Check valves
CV-3322 - Check Valve Inlet Non-Metallic.040 thru hole
Check valves
CV-3324 - Check Valve Inlet Non-Metallic.060 thru hole
Check valves
CV-3336 - Check Valve Out Non-Metallic 1/4-28 to 10-32
Check valves
CV-3345 - Check Valve Inline Outlet
Check valves
CV-3500 - Micro-Volume Check Valve
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Check valves
Check Valve Inlet
Check valves
Check Valve Inline
Check valves
Check Valve Outlet

Inline Check Valves

These valves restrict flow to one direction and prevent contamination or damage caused by backflow.

Prod. No.DescriptionSwept VolumeIncludes
CV-3000Inline Check Valve Assembly for 1/16” OD tubing96 µLCV-3001, P-215 (2), P-200 (2)
CV-3001Inline Check Valve Cartridge for CV-300091 µL-
CV-3010Inline Check Valve Assembly for 1/8” OD tubing100 µLCV-3011, P-315 (2), P-300 (2)
CV-3011Inline Check Valve Cartridge for CV-301095 µL-
Prod. No.Description**Cracking PressureThru-HoleSwept VolumePressure Rating
CV-3301Inlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F15 psi (1 bar)0.020” (0.50 mm)20 µL2,000 psi (138 bar)
CV-3302Outlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F15 psi (1 bar)0.020” (0.50 mm)20 µL2,000 psi (138 bar)
CV-3315Inlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F3 psi (0.2 bar)0.020” (0.50 mm)16 µL2,000 psi (138 bar)
CV-3316Outlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F3 psi (0.2 bar)0.020” (0.50 mm)16 µL2,000 psi (138 bar)
**F = Female (internal) threads; M = Male (external) threads; C = Coned; FB = Flat-Bottom
Prod. No.Description**Cracking PressureThru-HoleSwept VolumePressure Rating
CV-3500Inlet/Outlet Check Valve, 10-32 C, F to 10-32 C, F8 psi (0.6 bar)0.010” (0.25 mm)7.4 µL3,000 psi (207 bar)
**F = Female (internal) threads; M = Male (external) threads; C = Coned; FB = Flat-Bottom
Prod. No.Description**Cracking PressureThru-HoleSwept VolumePressure Rating
CV-3320Inlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F1 psi (0.07 bar)0.020” (0.50 mm)37 µL2,000 psi (138 bar)
CV-3321Outlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F1 psi (0.07 bar)0.020” (0.50 mm)37 µL2,000 psi (138 bar)
CV-3322Inlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F1 psi (0.07 bar)0.040” (1.0 mm)49 µL2,000 psi (138 bar)
CV-3323Outlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F1 psi (0.07 bar)0.040” (1.0 mm)49 µL2,000 psi (138 bar)
CV-3324Inlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F1 psi (0.07 bar)0.060” (1.60 mm)182 µL2,000 psi (138 bar)
CV-3325Outlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F1 psi (0.07 bar)0.060” (1.60 mm)182 µL2,000 psi (138 bar)
CV-3330Inlet/Outlet Check Valve, 1/4-28 FB, F to 1/4-28 FB, F1 psi (0.07 bar)0.020” (0.50 mm)34 µL2,000 psi (138 bar)
CV-3335Inlet Check Valve, 1/4-28 FB, F to 10-32 C, M1 psi (0.07 bar)0.020” (0.50 mm)49 µL2,000 psi (138 bar)
CV-3336Outlet Check Valve, 1/4-28 FB, F to 10-32 C, M1 psi (0.07 bar)0.020” (0.50 mm)49 µL2,000 psi (138 bar)
CV-3340Inlet/Outlet Check Valve, 10-32 C, F to 10-32 C, F1 psi (0.07 bar)0.020” (0.50 mm)34 µL2,000 psi (138 bar)
**F = Female (internal) threads; M = Male (external) threads; C = Coned; FB = Flat-Bottom
Prod. No.DescriptionSwept VolumeIncludes
P-696Quick-Stop Luer Check Valve Assembly127 µLP-697, P-655
P-697Quick-Stop Luer Check Valve107 µL-
P-699Bulkhead Quick-Stop Luer Valve107 µLnut/lock washer set

Shut-Off Valves

With the manual shut-off valves you stop the fluid flow immediately and reliably. These valves are made of ETFE and PEEK, which makes them extremely resistant to aggressive HPLC solvents.

  • Connection: Suitable for 1/4-28 flangeless fittings.
  • Compatibility: Works with PEEK, stainless steel and fluoropolymers. Use barbed adapters for soft tubing such as Tygon®.
Prod. No.*MaterialOD TubingThru-holeInternal Volume**Includes
P-721ETFE body, PEEK rotor black1/8"0.040” (1.0 mm)10.0 µLP-335 (2), P-300N (2)
P-782ETFE body, PEEK rotor black1/16"0.020” (0.5 mm)2.5 µLP-235 (2), P-200 (2)
P-783ETFE body, PEEK rotor black1/8"0.040” (1.0 mm)10.0 µLP-335 (2), P-300 (2)
**maximum internal volume, with valve fully open

Micro-Splitter Valves

Designed to accurately split a low flow stream from a main line.

  • High pressure: Versions available up to 4,000 psi (276 bar).
  • Graduated: Fitted with a scale for reproducible settings, so you can standardise methods more easily.
Prod. No.*DescriptionThreadsInternal Volume**Max PressureIncludes
P-450Standard Micro-Splitter Valve, Biocompatible1/4-282.1 / 4.1 µL800 psi (55 bar)P-235 (3), P-200 (3)
P-470High-Pressure Micro-Splitter Valve, Graduated with Stainless Steel Needle10-321.2 / 2.8 µL4,000 psi (276 bar)F-120 (3)
**referring to closed and fully open positions, respectively

Micro-Metering Valves

These needle valves offer ultra-fine control over the flow rate, adjustable down to only 3.5 µL/min. This makes them ideal for mass spectrometry and fraction collection.

  • Materials: PEEK and PTFE for maximum inertness.
  • Application: Can also be used for gas control in helium sparging lines.
Prod. No.*MaterialOD TubingThru-holeInternal Volume**Includes
P-445PEEK, Black1/16"0.020” (0.50 mm)7.7 µLP-330 (2), P-300 (2)
P-446PEEK, Black1/16"0.020” (0.50 mm)7.2 µLF-120 (2)
P-447PEEK, Black1/8"0.020” (0.50 mm)7.7 µLP-330 (2), P-300 (2)
**maximum internal volume with valve fully open

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