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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Catalog Number: (46600-040)
Supplier: VWR International
Description: This polypropylene non-return valve protects tubing and vacuum systems from back flow when pressure falls in the system.

Catalog Number: (76399-160)
Supplier: HICHROM LIMITED
Description: Back pressure regulator


Supplier: Ace Glass
Description: Polypropylene connectors, two-way or three-way, with PTFE valve and serrated tubulations

Small Business Enterprise

Supplier: Ace Glass
Description: This PTFE valve is used with NPT fittings.

Small Business Enterprise

Catalog Number: (89097-278)
Supplier: Ace Glass
Description: Similar to the Variable Bore Tubing Connector (89077-438), except this Two-Way Tubing Connector Valve features a single Tefzel control valve rated at ...

Product available on GSA Advantage® Small Business Enterprise


Catalog Number: (89077-462)
Supplier: Ace Glass
Description: This three-way tubing connector valve is used for applications where stream switching, reagent switching, sample removal, or sample injection is desir...

Product available on GSA Advantage® Small Business Enterprise


Catalog Number: (89077-464)
Supplier: Ace Glass
Description: This eight-way tubing connector valve is used for applications where multiple channels are necessary for distributing reagents, solvents, or buffers t...

Product available on GSA Advantage® Small Business Enterprise


Supplier: Upchurch Scientific
Description: Upchurch Scientific® Back Pressure Regulators (BPRs) are designed to enhance system performance through outgassing prevention and improved pump check ...

Catalog Number: (21511-232)
Supplier: Upchurch Scientific
Description: 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, m...


Supplier: Restek
Description: Parker's fittings are ideal for installing new equipment, modifying existing instrumentation, or replacing worn connections.

Supplier: Upchurch Scientific
Description: Prevent system over-pressurization with Upchurch Scientific® Pressure Relief Valves

Supplier: Upchurch Scientific
Description: Upchurch Scientific® cartridge-style Inline Check Valves are designed to limit flow in one direction

Supplier: Upchurch Scientific
Description: Upchurch Scientific® Nonmetallic 1/4-28 Inline Check Valves provide excellent backflow protection for sensitive equipment along with outstanding chemi...

Supplier: Restek
Description: Parker's fittings are ideal for installing new equipment, modifying existing instrumentation, or replacing worn connections.

Catalog Number: (10853-426)
Supplier: Restek
Description: Outlet Check Valve for PE 200, 4, 250, 400, 410, 620, Similar to PE# 02540197


Supplier: Restek
Description: Check Valve, Outlet for Shimadzu LC-20AD/B, Similar to Shimadzu# 228-45705-91

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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.
You must log in to order restricted items. We request that you provide the required business documentation to purchase this product for the first time.

To order chemicals, medical devices, or other restricted products please provide identification that includes your business name and shipping address via email CMD_NA@vwr.com or fax 484.881.5997 referencing your VWR account number . Acceptable forms of identification are:

  • issued document with your organization's Federal Tax ID Number
  • Government issued document with your organization's Resale Tax ID Number
  • Any other Government ID that includes the business name and address


VWR will not lift restrictions for residential shipping addresses.

-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 currently unavailable but limited stock may be available in our extended warehouse network. Please call 1-800-932-5000 and a VWR Customer Service Representative will help you.
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