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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:   This polypropylene non-return valve protects tubing and vacuum systems from back flow when pressure falls in the system. The recommended working pressure range for this valve is 1.0 to 28.4 psi. Nominal O.D.: 8/9/10mm. Crest O.D.: 7.8/10.0mm.
Catalog Number: 46600-040
Supplier: VWR International



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Description:   Back pressure regulator
Catalog Number: 76399-160
Supplier: HICHROM LIMITED



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Description:   Cs/6, Sp/1
Catalog Number: 71000-288
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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Description:   Cs/6, Sp/1
Catalog Number: 71000-284
Supplier: Ace Glass


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Description:   8-WAY VALVE TEFZEL OMNIFIT.
Catalog Number: 89077-464
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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Description:   Cs/6, Sp/1
Catalog Number: 71000-286
Supplier: Ace Glass


Small Business Enterprise

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


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Description:   PTFE Stopcock Valve, Two Way, 1/4" Female NPT
Catalog Number: 10099-050
Supplier: Ace Glass


Small Business Enterprise

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Description:   Cs/6, Sp/1
Catalog Number: 71000-282
Supplier: Ace Glass


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Description:   PTFE VALVE WITH ONE 1/4" MALE MALE-LUER CONNECTION AND ONE 1/4" FEMALE NPT CONNECTION.
Catalog Number: 89052-608
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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Description:   CONNECTION VALVE UNIVERSAL PTFE.
Catalog Number: 89077-466
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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Description:   PTFE Stopcock Valve, Two Way, 1/8" Female NPT
Catalog Number: 10099-046
Supplier: Ace Glass


Small Business Enterprise

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Description:   PTFE Stopcock Valve, Two Way, 3/4" Female NPT
Catalog Number: 10099-062
Supplier: Ace Glass


Small Business Enterprise

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Description:   PTFE Stopcock Valve, Two Way, 3/4" Tube Compression
Catalog Number: 10099-064
Supplier: Ace Glass


Small Business Enterprise

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Description:   PTFE Stopcock Valve, Two Way, 1/2" Female NPT
Catalog Number: 10099-058
Supplier: Ace Glass


Small Business Enterprise

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Description:   Tefzel Pk2
Catalog Number: 89097-278
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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Description:   PTFE Stopcock Valve, Two Way, 1/2" Tube Compression
Catalog Number: 10099-060
Supplier: Ace Glass


Small Business Enterprise

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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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Catalog Number: 21528-210
Supplier: Upchurch Scientific



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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:   0-14 drain valve only, 1in beaded pipe with 1/2in swagelock sidearm
Catalog Number: 89209-350
Supplier: Chemglass


Small Business Enterprise

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



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Catalog Number: 77100-280
Supplier: Optimize



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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: 77100-696
Supplier: Optimize



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Catalog Number: 77100-692
Supplier: Optimize



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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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