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Non Return Valves

106  results were found
Non Return Valves

Our non-return valves protect tubing and vacuum systems from backflow when pressure falls in the system. Sealing system eliminates backflow, helping to prevent upstream contamination or damage. These valves are compatible with a wide range of systems, all with different specific levels when dealing with the three main pressure values: cracking pressure, maximum pressure, and back pressure created. Durable steel or plastics are used in all designs, with spring loaded, creating a quality product that will remain independent for years with no need for replacement.


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Description:   Active Inlet Valve (AIV) Replacement Cartridge, 600 bar
Catalog Number: 10123-660
Supplier: Optimize



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Description:   For 1/8 inch OD tubing 1/4-28 threads, Tefzel* (ETFE), .040 inch thru-hole, blue
Catalog Number: 21511-232
Supplier: Upchurch Scientific



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Description:   Ball Valve
Catalog Number: 10058-920
Supplier: Restek



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Description:   PEEK* Holder with PEEK/Tefzel* Cartridge, 1/4-28 Tefzel Flangeless Fittings for 1/16 OD Tubing, Wrenches
Catalog Number: 21511-586
Supplier: Upchurch Scientific



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Description:   Ball Valve
Catalog Number: 10855-722
Supplier: Restek



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Description:   PTFE VALVE WITH TWO 3/8" FEMALE NPT CONNECTIONS.
Catalog Number: 89052-618
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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Description:   Angle Valve for HPLC, 1/16 inch Fittings, 1/4-28, Material: Stainless Steel, Includes: Nuts and Ferrules, low internal volumes and are rated to 15,000 psi (103,421 kPa), two-piece stem assembly in which the rotating upper shank is coupled through a ball joint to a static lower stem
Catalog Number: 10853-750
Supplier: Avantor



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Description:   Outlet housing. Stainless steel cartridge. Red 3.2mm ball. For use with Hewlett-Packard* HPLC systems, models 1050, 1100.
Catalog Number: 77100-702
Supplier: Optimize



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Catalog Number: 77100-292
Supplier: Optimize



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Description:   For select models from ABI/Kratos, Gilson*, HP/Agilent*, LDC/Milton Roy, PerkinElmer*, Integral 4000, Spectra-Physics*, Isochrom, P-Series, the SSI 200 Series Model 300, Varian* models 2010, 9000 Star, 9010, 9012, Waters* 100, 225uL systems. Stainless steel, 3.2mm.
Catalog Number: 77100-286
Supplier: Optimize



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Description:   Hitachi* 655, L-600, L-6200/L-6200A, L-7100 (LaChrom), LKB 2150, 2248, Shimadzu LC-600, LC-9A, LC10AD (and ESA 580), LC-10ADVP, LC-10AT, LC-10ATVP, Waters* 2690/Alliance, Varian 616. Stainless steel, 1.6 mm.
Catalog Number: 77100-278
Supplier: Optimize



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Description:   Ball Valve
Catalog Number: 10855-016
Supplier: Restek



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Description:   Ball Valve
Catalog Number: 10855-720
Supplier: Restek



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Description:   PerformancePLUS Check Valve Cartridge, for HPLC Systems, Model Number: 1515, 1525, 2690, 2695, 2795, 510, 515, 600, 610
Catalog Number: 10853-420
Supplier: Restek



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Description:   Check Valve, Outlet for Shimadzu LC-20AD/B, Similar to Shimadzu# 228-45705-91
Catalog Number: 10853-702
Supplier: Restek



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Description:   PTFE VALVE WITH ONE 1/4" MALE NPT CONNECTION AND ONE 1/4" OD TUBE COMPRESSION CONNECTION.
Catalog Number: 89052-616
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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Description:   Bottom Vent Valve for HPLC, 1/16 inch Fittings, 1/4-28, Material: Stainless Steel, Includes: Nuts and Ferrules, low internal volumes and are rated to 15,000 psi (103,421 kPa), two-piece stem assembly in which the rotating upper shank is coupled through a ball joint
Catalog Number: 10853-600
Supplier: Avantor



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Description:   Outlet Check Valve for Shimadzu LC-600, LC-9A, LC-10AD, LC-10AT, Similar to Shimadzu# 228-18522-92
Catalog Number: 10853-440
Supplier: Restek



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Description:   This Guarantees 3 Bubbles/Minute Or Less In The Industry Standard Nitrogen Bubble Test; Common Acceptable Standards Are 12 Bubbles Or Less.
Catalog Number: 89522-316
Supplier: Optimize



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Description:   Ultra-Low Volume, Low Flow 100 psi (7 bar) With Flangeless Fittings & 1/16 OD PEEK* Tubing (.010 ID)
Catalog Number: 53501-328
Supplier: Upchurch Scientific



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Description:   PTFE VALVE WITH ONE 1/8" FEMALE NPT CONNECTION AND ONE 1/4" FEMALE NPT CONNECTION.
Catalog Number: 89052-614
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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Description:   For 1/16 inch OD tubing, 1/4-28 threads, with flangeless fittings
Catalog Number: 21511-160
Supplier: Upchurch Scientific



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Description:   75 psi (5.2 bar) PEEK* Holder with PEEK/Tefzel* Cartridge, 1/4-28 Tefzel flangeless fittings for 1/1 inch OD tubing, wrenches
Catalog Number: 21511-600
Supplier: Upchurch Scientific



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Description:   PTFE VALVE WITH ONE 1/4"-28UNF CONNECTION AND ONE 1/4" FEMALE NPT CONNECTION.
Catalog Number: 89052-610
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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Description:   This Guarantees 3 Bubbles/Minute Or Less In The Industry Standard Nitrogen Bubble Test; Common Acceptable Standards Are 12 Bubbles Or Less.
Catalog Number: 89522-318
Supplier: Optimize



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Catalog Number: 77100-288
Supplier: Optimize



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Description:   For Beckman* 100A, 110A, 110A/B, 112/112M, 114/114M, 116, 118, 125, 126, 127, 128, stainless steel, 4.8mm.
Catalog Number: 77100-294
Supplier: Optimize



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Catalog Number: 77100-694
Supplier: Optimize



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Description:   For Beckman 110A/B, 112/112M, 114/114M, 116 systems. Contains 1 inlet housing and cartridge and 1 outlet housing and cartridge.
Catalog Number: 83008-434
Supplier: Optimize



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Description:   Ball Valve, Shut-Off Gas Valve, Size: 1/8in, Material: Stainless Steel, Accessory for gas chromatography
Catalog Number: 10803-334
Supplier: Restek



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Description:   Black/Blue, PEEK*/Tefzel*, for Upchurch Scientific Back Pressure Regulator Holders
Catalog Number: 53521-132
Supplier: Upchurch Scientific



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Description:   With PEEK* polymer body and perfluoroelastomer disc, featuring 0.060in through-holes for higher flow rates
Catalog Number: 97055-072
Supplier: Upchurch Scientific



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