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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, 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, creating a quality product that will remain independent for years with no need for replacement.


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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-BOHLE680-21

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.

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Product Image-118-0137

Thermostatic mixing valve for eye showers

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

Product Image-NALG6120-0010

Vacuum check valve and positive connector, Nalgene®

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

Environmentally Preferable


Product Image-229-3331

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).

Product Image-229-3311

Non-return valve

Catalog Number: (229-3311)
Supplier: Brand
Description: HDPE, transparent. Prevents backflow. With FKM valve disc not suitable for pressure applications.
UOM: 1 * 1 items
Product Image-VITL78593

Non return valves

Catalog Number: (VITL78593)
Supplier: VITLAB
Description: These non return valves are made from HDPE.
UOM: 1 * 10 items
Product Image-229-0538

Non-return valves, SP Bel-Art

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.

Product Image-BURK8540-0012

Non return valve, PP

Catalog Number: (BURK8540-0012)
Supplier: BURKLE
Description: Valve made of PP and POM, seal made of EPDM, springs made of stainless steel 1.4401.
UOM: 1 * 1 items
Product Image-229-0137

Non return valves

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

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Idex® Back Pressure Regulator (BPR) Holder

Catalog Number: (COLE02017-09)
Supplier: Cole-Parmer
Description: Enhance system performance through outgassing prevention.
UOM: 1 * 1 items

New Product


Product Image-HEWL19362-60515

Mass flow controllers and restrictors

Supplier: Agilent
Description: Old style restrictor, 0 - 20 ml/min, red/silver colour

Image Unavailable-HEWL19246-60560

Back pressure regulator

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

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 pressure from 0 to 20 bar (15 to 300 psi) without disconnecting from the system. Other sizes available.

Product Image-229-3591

Non-return valve

Catalog Number: (229-3591)
Supplier: Lenz Laborglas GmbH & CO.KG
Description: DURAN®, borosilicate glass, clear. Prevent pressure loss or backflow. Simple design, cannot be dismantled.
UOM: 1 * 1 items
Product Image-554-3059

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.

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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 0800 22 33 44.
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 0800 22 33 44
Additional Documentation may be needed to purchase this item. A VWR representative will contact you if needed.
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 Catalogue Number listed above. If you need further assistance, please call VWR Customer Service on 0800 22 33 44.
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