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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:   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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Catalog Number: 77100-704
Supplier: Optimize



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Description:   For Waters* 625/626 systems. Stainless steel, 1.6mm.
Catalog Number: 77100-282
Supplier: Optimize



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Description:   Outlet Check Valve for PE 200, 4, 250, 400, 410, 620, Similar to PE# 02540197
Catalog Number: 10853-426
Supplier: Restek



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Description:   PTFE VALVE WITH TWO 1/2" FEMALE NPT CONNECTIONS.
Catalog Number: 89052-620
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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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: 21511-598
Supplier: Upchurch Scientific



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Description:   Material; Valve - ETFEFittings - 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: KT420817-2306
Supplier: DWK Life Sciences (KIMBLE)



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Description:   For 1/16 inch OD tubing with Delrin*/Tefzel* fittings & wrenches, 100 psi (7 bar)
Catalog Number: 21511-532
Supplier: Upchurch Scientific



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Description:   Back Pressure Regulator, 100 psi (7 bar) PEEK*/Tefzel*, Tan/Red, for Upchurch Scientific Back Pressure Regulator Holders
Catalog Number: 21511-588
Supplier: Upchurch Scientific



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Description:   For HP/Agilent* 1050, 1100. Stainless steel.
Catalog Number: 77100-700
Supplier: Optimize



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Description:   Prime/Purge Valve Repair Kit for Prime/Purge Valve, Includes: soft seal (2), PTFE O-ring (2), 7/32 hex key
Catalog Number: 10853-752
Supplier: Restek



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Description:   with 1000 psi (69 bar) Cartridge
Catalog Number: 53521-124
Supplier: Upchurch Scientific



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Description:   PTFE VALVE WITH ONE 1/4" OD TUBE CONNECTION AND ONE 1/4" FEMALE NPT CONNECTION.
Catalog Number: 89052-612
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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Description:   Material; Valve - ETFEFittings - ETFE Valve, 1-way, 1/4-28 Threads, with 1/8" 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: KT420817-2313
Supplier: DWK Life Sciences (KIMBLE)



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Description:   For 1/16 inch OD tubing
Catalog Number: 53500-796
Supplier: Upchurch Scientific



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Description:   1/4-28 threads, .02 inch thru-hole, Perfluoroelastomer O-ring
Catalog Number: 53501-030
Supplier: Upchurch Scientific



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