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: (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: This PTFE valve is used with NPT fittings.

Small Business Enterprise

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

Product available on GSA Advantage® 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: (89077-464)
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


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: (89077-466)
Supplier: Ace Glass
Description: This universal tubing connector body includes an integral linear valve designed to provide flow control while connecting large O.D tubing to small O.D...

Product available on GSA Advantage® Small Business Enterprise


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

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

Supplier: Upchurch Scientific
Description: Upchurch Scientific® Ultra-Low Volume Back Pressure Regulators (BPRs) were developed to minimize swept volume, which is especially important for multi...

Supplier: Optimize
Description: Preassembled check valve cartridges conveniently insert into a reusable housing and function in either the inlet or outlet position

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

Supplier: Optimize
Description: Each ball and seat set is individually matched to ensure a lock-and-key fit. This guarantees three bubbles/minute or less in the industry standard nit...

Supplier: Restek
Description: Our valves have low internal volumes and are rated to 15,000 psi (103,421 kPa).

Supplier: Restek
Description: Inlet Check Valve for Shimadzu LC-600, LC-9A, LC-10AD, Similar to Shimadzu# 228-18522-91

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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.
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@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 1-800-932-5000.
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