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You Searched For: 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.

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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Product Image-LENZ05590000

Non-return valve

Catalog Number: (LENZ05590000)
Supplier: Lenz Laborglas GmbH & CO.KG
Supplier Article Number:: 05590000
Description: DURAN®, borosilicate glass, clear. Prevent pressure loss or backflow. Simple design, cannot be dismantled.
UOM: 1 * 1 items
Product Image-HICHHI-128

Avantor® Hichrom PEEKsil™, Back Pressure Regulator

Catalog Number: (HICHHI-128)
Supplier: Avantor
Description: Avantor® Hichrom, Back pressure regulator, Pressure: 5,17 bar
UOM: 1 * 1 items
Product Image-BURK8714-0080

Non return valves

Supplier: BURKLE
Description: Translucent PP retaining valves with embossed directional arrow or printed in black. With tapered ends. Various uses.

Product Image-BOHLE680-31

Non return valves, BOLA

Supplier: Bohlender
Description: These non return valves are made from PTFE, with nuts made from glass fibre reinforced PTFE for connecting tubing or tubes.

Product Image-VITL78593

Non return valves

Catalog Number: (VITL78593)
Supplier: VITLAB
Supplier Article Number:: 78593
Description: These non return valves are made from HDPE.
UOM: 1 * 10 items
Product Image-KART418

Non-return valves

Supplier: KARTELL
Description: PP, translucent. Prevent pressure loss and backflow. Maximum working pressure 2 bar and minimum working pressure  0,07 bar at room temperature (20 °C).

Image Unavailable-SGEA1236282

Micro control valves

Supplier: SGE Analytical Science
Description: Micro control valves provide precision metering and on-off control of gas flows. They are designed specifically for chromatography applications and used at elevated temperatures from high vacuum to medium pressure.

Product Image-BRND134002

Non-return valve

Catalog Number: (BRND134002)
Supplier: Brand
Supplier Article Number:: 134002
Description: HDPE, transparent. Prevents backflow. With FKM valve disc not suitable for pressure applications.
UOM: 1 * 1 items
Product Image-UPCHCV-3001

Inline cartridge check valves, Upchurch Scientific®

Supplier: UPCHURCH SCIENTIFIC
Description: Inline cartridge check valves are designed to limit flow in one direction and deliver a low cracking pressure. Ideal placement for these valves would be on the effluent side of the column to prevent post-column derivatisation agents from flowing back and poisoning the column if the HPLC mobile phase pump were to shut down.

Product Image-NALG6120-0010

Vacuum check valve and positive connector, Nalgene®

Catalog Number: (NALG6120-0010)
Supplier: Thermo Fisher Scientific
Supplier Article Number:: 6120-0010
Description: These vacuum check valves with positive connector are designed to prevent back pressure with aspirator-type vacuum pumps.
UOM: 1 * 6 items

Environmentally Preferable


Product Image-UPCHU-455

Pressure relief valves, Upchurch Scientific®

Supplier: UPCHURCH SCIENTIFIC
Description: Pressure relief valves are ideal for preventing system over-pressurisation. These products protect system components by diverting fluid flow automatically when inline pressure exceeds the set limit.

Product Image-UPCHP-782

Shut-off valves, Upchurch Scientific®

Supplier: UPCHURCH SCIENTIFIC
Description: Stop a flow stream quickly with these shut-off valves. The bodies are manufactured from either PEEK or ETFE. 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.

Product Image-UPCHM-410

Ultra-low volume back pressure regulators (BPR), Upchurch Scientific®

Supplier: UPCHURCH SCIENTIFIC
Description: These ultra-low volume back pressure regulators (BPRs) are developed to minimise swept volume, which is especially important for multi-detector applications.

Product Image-UPCHCV-3315

Inline check valves, standard 1/4-28, Upchurch Scientific®

Supplier: UPCHURCH SCIENTIFIC
Description: These standard inline check valves are made from gold plated stainless steel.

Image Unavailable-UPCHP-696

Inline check valves, quick-stop luer, Upchurch Scientific®

Catalog Number: (UPCHP-696)
Supplier: UPCHURCH SCIENTIFIC
Supplier Article Number:: P-696
Description: The Quick-Stop Luer check valve assembly is specifically designed to provide inline Luer connect/disconnect convenience while avoiding spills. It is made from biocompatible PEEK with gold-plated stainless steel spring.
UOM: 1 * 1 items
Product Image-UPCHP-764

Back pressure regulators, Upchurch Scientific®

Supplier: UPCHURCH SCIENTIFIC
Description: Back pressure regulator assemblies are designed to create incremental back pressures ranging from 5 to 1000 psi (0,3 to 69 bar). These biocompatible and stainless steel back pressure regulator assemblies are available complete with a replaceable, factory pre-set cartridge (except the 5 and 20 psi (0,3 to 1,4 bar versions).

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Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the call is still displayed and you need assistance, please call us at +65 6505 0760.
Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the call is still displayed and you need assistance, please call us at +65 6505 0760.
This product is marked as restricted and can only be purchased by approved Shipping Accounts. If you need further assistance, email VWR at sales@sg.vwr.com
-Additional Documentation May be needed to purchase this item. A VWR representative will contact you if needed.
This product has been blocked by your organization. Please contact your purchasing department for more information.
The original product is no longer available. The replacement shown is available.
This product is no longer available. Alternatives may be available by searching with the VWR Catalog Number listed above. If you need further assistance, please call VWR Customer Service at +65 6505 0760.
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