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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:   Z2 PEEK Caps Ceramic Ball/Seat 2PK
Catalog Number: 97056-514
Supplier: Optimize



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Description:   Outlet Check Valve for Shimadzu LC-10ADvp, LC-10A Tvp, Similar to Shimadzu# 228-34976-91
Catalog Number: 10853-270
Supplier: Restek



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Description:   Material; Valve - PEEKFittings - PEEK/ETFE Valve, 1-way, 1/4-28 Threads, with 1/16" Flangeless Fittings The following tubing nuts and ferrules are required to make the initial tubing connections to the end fittings of Chromaflex AQ and Chromaflex OR Columns.
Catalog Number: KT420817-3306
Supplier: DWK Life Sciences (KIMBLE)



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Description:   Prime/Purge Valve for HPLC, 1/4-28 Flanged Seat, Material: Stainless Steel, with Tubing and Fittings, 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: 10853-602
Supplier: Restek



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Catalog Number: 77100-692
Supplier: Optimize



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Catalog Number: 77100-696
Supplier: Optimize



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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


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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:   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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Description:   Check Valve Cartridges (2) for Waters Alliance, Similar to Waters #WAT270941, 2-pk.
Catalog Number: 10853-584
Supplier: Restek



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