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, creating a quality product that will remain independent for years with no need for replacement.
VWR® Non-Return Valves
Supplier: VWR International
This polypropylene non-return valve protects tubing and vacuum systems from back flow when pressure falls in the system.
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Avantor® Hichrom, Back Pressure Regulator
Supplier: Avantor
Avantor® Hichrom, Back pressure regulator
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Connectors, with PTFE Plug Valve, Ace Glass Incorporated
Supplier: Ace Glass
Polypropylene connectors, two-way or three-way, with PTFE valve and serrated tubulations
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Eight-Way Tubing Connector Valve, Ace Glass Incorporated
Supplier: Ace Glass
This eight-way tubing connector valve is used for applications where multiple channels are necessary for distributing reagents, solvents, or buffers to chromatography columns
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Two-Way Tubing Connector Valve, Ace Glass Incorporated
Supplier: Ace Glass
Similar to the Variable Bore Tubing Connector (89077-438), except this Two-Way Tubing Connector Valve features a single Tefzel control valve rated at 500psi
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PTFE Stopcock Valve, Two Way, Ace Glass Incorporated
Supplier: Ace Glass
This PTFE valve is used with NPT fittings.
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Three-Way Tubing Connector Valve, Ace Glass Incorporated
Supplier: Ace Glass
This three-way tubing connector valve is used for applications where stream switching, reagent switching, sample removal, or sample injection is desirable
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PerformancePLUS Check Valve Housing for Waters HPLC Systems, Restek
Supplier: Restek
PerformancePLUS Check Valve Housing
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Check Valve Cartridges for Waters HPLC Systems, Restek
Supplier: Restek
Check Valve Cartridges (2) for Waters Alliance, Similar to Waters #WAT270941, 2-pk.
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Ball Valve, Parker Balston® Shut-Off Gas Valve, Restek
Supplier: Restek
Parker's fittings are ideal for installing new equipment, modifying existing instrumentation, or replacing worn connections.
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PerformancePLUS Check Valve Cartridge for Waters HPLC Systems, Restek
Supplier: Restek
PerfromancePLUS Check Valve Cartridge, Similar to Waters #700000254, 2-pk.
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Outlet Check Valves for Shimadzu HPLC Systems, Restek
Supplier: Restek
Check Valve, Outlet for Shimadzu LC-20AD/B, Similar to Shimadzu# 228-45705-91
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Prime/Purge Valve Repair Kit for Prime/Purge Valve, Restek
Supplier: Restek
Prime/Purge Valve Repair Kit for Prime/Purge Valve
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Outlet Check Valve for PerkinElmer HPLC Systems, Restek
Supplier: Restek
Outlet Check Valve for PE 200, 4, 250, 400, 410, 620, Similar to PE# 02540197
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Inlet Check Valve for PerkinElmer HPLC Systems, Restek
Supplier: Restek
Inlet Check Valve for PE 200, 4, 250, 400, 410, 620, Similar to PE# 02540177
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OPTI-MAX® Check Valves and Replacement Cartridges, Optimize Technologies
Supplier: Optimize
Preassembled check valve cartridges conveniently insert into a reusable housing and function in either the inlet or outlet position
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Ball Valve, Swagelok® Shut-Off Gas Valve, Restek
Supplier: Restek
Parker's fittings are ideal for installing new equipment, modifying existing instrumentation, or replacing worn connections.
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Ball Valve, 2-Way, Straight, Parker, Restek
Supplier: Restek
Parker's fittings are ideal for installing new equipment, modifying existing instrumentation, or replacing worn connections.
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Upchurch Scientific® Inline Cartridge Check Valves, IDEX Health and Science
Supplier: Upchurch Scientific
Upchurch Scientific® cartridge-style Inline Check Valves are designed to limit flow in one direction
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Upchurch Scientific® Back Pressure Regulators, IDEX Health & Science
Supplier: Upchurch Scientific
Upchurch Scientific® Back Pressure Regulators (BPRs) are designed to enhance system performance through outgassing prevention and improved pump check valve efficiency.
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Upchurch Scientific® Pressure Relief Valves, IDEX Health & Science
Supplier: Upchurch Scientific
Prevent system over-pressurization with Upchurch Scientific® Pressure Relief Valves
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Valves for HPLC, Restek
Supplier: Avantor
Our valves have low internal volumes and are rated to 15,000 psi (103,421 kPa).
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Sparging Relief Valve, Upchurch Scientific®
Supplier: Upchurch Scientific
The 3/16" ruby ball will quickly open and depressurize the reservoir before the mobile phase can rise up the tubing.
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Upchurch Scientific® Standard ¹/₄-28 Inline Check Valves, IDEX Health & Science
Supplier: Upchurch Scientific
Connect standard 1/4-28 Inline Check Valves to any 1/4-28 flat-bottom port to limit flow to one direction
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Shut-Off Valves, Upchurch Scientific®
Supplier: Upchurch Scientific
Stop a flow stream quickly with these shut-off valves. The bodies are manufactured from either PEEK or ETFE and both versions feature a PCTFE rotor, making them highly resistant to chemicals. The blue colorant used in some valve configurations has proven not to leach out with common HPLC solvents.
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Upchurch Scientific® Nonmetallic ¹/₄-28 Inline Check Valves, IDEX Health & Science
Supplier: Upchurch Scientific
Upchurch Scientific® Nonmetallic 1/4-28 Inline Check Valves provide excellent backflow protection for sensitive equipment along with outstanding chemical resistance guaranteed by the PEEK™ polymer and perfluoroelastomer construction
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Drain Valves for Filter Reactors, Chemglass
Supplier: Chemglass
These drain valves are suitable for filter reactors having volumes from 0 - 14 l.
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Inlet Check Valves for Shimadzu HPLC Systems, Restek
Supplier: Restek
Inlet Check Valve for Shimadzu LC-10ADvp, Similar to Shimadzu# 228-39093-92
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Upchurch Scientific® Ultra-Low Volume Back Pressure Regulators, IDEX Health & Science
Supplier: Upchurch Scientific
Upchurch Scientific® Ultra-Low Volume Back Pressure Regulators (BPRs) were developed to minimize swept volume, which is especially important for multi-detector applications
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Kimble® CHROMAFLEX® One-Way Valves, DWK Life Sciences
Supplier: DWK Life Sciences (KIMBLE)
One-Way valves are designed for use in making connections between the tubing and the end fittings of CHROMAFLEX® columns.
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: VWR International
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