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 ST


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: 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...

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

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...

Catalog Number: (229-3311)
Supplier: Brand
Supplier Article Number : 134002
Description: HDPE, transparent. Prevents backflow. With FKM valve disc not suitable for pressure applications.
UOM: 1 * 1 ST


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 ST


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


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

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.

Catalog Number: (BURK8540-0012)
Supplier: BÜRKLE
Supplier Article Number : 8540-0012
Description: Valve made of PP and POM, seal made of EPDM, springs made of stainless steel 1.4401.
UOM: 1 * 1 ST


Supplier: QVF LABORTECHNIK GMBH
Description: Air valve anti-return, cone size 14/23 NS, without sidearm, Borosilicate glass 3.3

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 ultra-low volume back pressure regulators (BPRs) are developed to minimise swept volume, which is especially important for multi-detector applic...

Supplier: UPCHURCH SCIENTIFIC
Description: These biocompatible PEEK and perfluoroelastomer inline check valves are designed for applications where low flow path volume is critical, such as deli...

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 ...

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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 1-800-932-5000.
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 1-800-932-5000.
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 Regulatory.affairs.ch@vwr.com
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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.
Product(s) marked with this symbol are discontinued - sold till end of stock. Alternatives may be available by searching with the VWR Catalogue Number listed above. If you need further assistance, please call VWR Customer Service on 044 745 13 13
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