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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:   PTFE Stopcock Valve, Two Way, 3/8" Female NPT
Catalog Number: 10099-054
Supplier: Ace Glass


Small Business Enterprise

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Description:   PTFE Stopcock Valve, Two Way, 3/8" Tube Compression
Catalog Number: 10099-056
Supplier: Ace Glass


Small Business Enterprise

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Description:   PTFE Stopcock Valve, Two Way, 1/8" Tube Compression
Catalog Number: 10099-048
Supplier: Ace Glass


Small Business Enterprise

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Description:   3-WAY TEFZEL VALVE OMNIFIT.
Catalog Number: 89077-462
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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Description:   PEEK* Holder with PEEK/Tefzel* Cartridge, 1/4-28 Tefzel Flangeless Fittings for 1/16 OD Tubing
Catalog Number: 21001-206
Supplier: Upchurch Scientific



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Description:   1/4-28 threads, .02 inch thru-hole, Perfluoroelastomer O-ring
Catalog Number: 53501-028
Supplier: Upchurch Scientific



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Description:   with Stainless Steel Holder with PEEK/Tefzel* Cartridge, 1/4-28 Delrin*/Tefzel Flangeless Fittings for 1/16 OD Tubing
Catalog Number: 21511-596
Supplier: Upchurch Scientific



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Description:   Back Pressure Regulator, 500 psi (34 bar) PEEK*/Tefzel*, Tan/Green, for Upchurch Scientific Back Pressure Regulator Holders
Catalog Number: 21511-590
Supplier: Upchurch Scientific



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Description:   Ultra-Low Volume, Low Flow, 500 psi (34 bar) With Flangeless Fittings & 1/16 OD PEEK* Tubing (.010 ID)
Catalog Number: 53501-020
Supplier: Upchurch Scientific



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Catalog Number: 21528-210
Supplier: Upchurch Scientific



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Description:   For use with Upchurch Scientific Back Pressure Regulator hardware, useful for applications where more efficient pump performance is needed through provision of strong pre-load pressure
Catalog Number: 97055-106
Supplier: Upchurch Scientific



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Description:   PerformancePLUS Check Valve Housing, for HPLC Systems, Model No: 1515, 1525, 510, 515, 525, 600, 610
Catalog Number: 10853-686
Supplier: Restek



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Description:   Ball Valve, 2-Way, Straight
Catalog Number: 10854-528
Supplier: Restek



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Description:   Ball Valve
Catalog Number: 10855-636
Supplier: Restek



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Description:   Ball Valve
Catalog Number: 10855-718
Supplier: Restek



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Catalog Number: 77100-296
Supplier: Optimize



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