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


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 us...

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

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 (2...

Supplier: BROEN-LAB
Description: Thermostatic mixing valve for eye showers designed for delivering tepid water (20 to 25 °C).

Catalog Number: (229-3311)
Supplier: Brand
Description: HDPE, transparent. Prevents backflow. With FKM valve disc not suitable for pressure applications.
UOM: 1 * 1 items


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


Catalog Number: (VITL78593)
Supplier: VITLAB
Description: These non return valves are made from HDPE.
UOM: 1 * 10 items


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

Catalog Number: (BURK8540-0012)
Supplier: BÜRKLE
Description: Valve made of PP and POM, seal made of EPDM, springs made of stainless steel 1.4401.
UOM: 1 * 1 items


Supplier: Bel-Art Products, a Part of SP
Description: PP valve, translucent with neoprene valve disk. Stops reverse flow of liquid when pressure is interrupted.

Supplier: Agilent
Description: New style restrictor, 0 - 110 ml/min, green/purple colour

Catalog Number: (HEWL19246-60560)
Supplier: Agilent
Description: Back pressure regulator, 1 - 15 psi
UOM: 1 * 1 items


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 a...

Supplier: JOUR RESEARCH (VICI)
Description: This regulator installs on the detector drain line and prevents bubble formation in the flow cell during outgassing. It has an adjustable back pressur...

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

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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 on +353 1 88 22222.
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 on +353 1 88 22222
This product is marked as restricted and can only be purchased by approved Shipping Accounts. If you need further assistance, email VWR Regulatory Department at eurega_services@eu.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 organisation. Please contact your purchasing department for more information.
The original product is no longer available. The replacement shown is available.
Product(s) marked with this symbol are discontinued - sold till end of stock. Alternatives may be available by searching with the VWR Catalog Number listed above. If you need further assistance, please call VWR Customer Service on +353 1 8822222.
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