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Non Return Valves


33  results were found
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.


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Supplier:  Restek
Description:   Parker's fittings are ideal for installing new equipment, modifying existing instrumentation, or replacing worn connections.
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Supplier:  Restek
Description:   Parker's fittings are ideal for installing new equipment, modifying existing instrumentation, or replacing worn connections.
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Supplier:  Upchurch Scientific
Description:   Connect standard 1/4-28 Inline Check Valves to any 1/4-28 flat-bottom port to limit flow to one direction
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Catalog Number: (10853-426)

Supplier:  Restek
Description:   Outlet Check Valve for PE 200, 4, 250, 400, 410, 620, Similar to PE# 02540197
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Supplier:  Upchurch Scientific
Description:   Upchurch Scientific® cartridge-style Inline Check Valves are designed to limit flow in one direction
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Supplier:  Restek
Description:   Parker's fittings are ideal for installing new equipment, modifying existing instrumentation, or replacing worn connections.
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Supplier:  Avantor
Description:   Our valves have low internal volumes and are rated to 15,000 psi (103,421 kPa).
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Supplier:  Restek
Description:   Inlet Check Valve for Shimadzu LC-600, LC-9A, LC-10AD, Similar to Shimadzu# 228-18522-91
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Catalog Number: (10853-420)

Supplier:  Restek
Description:   PerformancePLUS Check Valve Cartridge, for HPLC Systems, Model Number: 1515, 1525, 2690, 2695, 2795, 510, 515, 600, 610
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Supplier:  Restek
Description:   Check Valve, Outlet for Shimadzu LC-20AD/B, Similar to Shimadzu# 228-45705-91
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Catalog Number: (89209-350)

Supplier:  Chemglass
Description:   These drain valves are suitable for filter reactors having volumes from 0 - 14 l.
Small Business Enterprise
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Catalog Number: (10853-584)

Supplier:  Restek
Description:   Check Valve Cartridges (2) for Waters Alliance, Similar to Waters #WAT270941, 2-pk.
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Supplier:  Upchurch Scientific
Description:   Upchurch Scientific® Nonmetallic 1/4-28 Inline Check Valves provide excellent backflow protection for sensitive equipment along with outstanding chemi...
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Catalog Number: (53500-818)

Supplier:  Upchurch Scientific
Description:   The 3/16" ruby ball will quickly open and depressurize the reservoir before the mobile phase can rise up the tubing.
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Catalog Number: (10853-476)

Supplier:  Restek
Description:   Inlet Check Valve for HPLC Systems, Model Number: Int. 4000, 1, 10, 2, 200 Series, 250, 3, 3B, 4, 400, 410, 620, Series 200 Micropump
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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...
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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.
To process your orders without delay, please provide the required business documentation to purchase this product.

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

  • State issued document with your organization's Federal Tax ID Number
  • State issued document with your organization's Resale Tax ID Number
  • City or County issued Business License
  • State Department of Health Services License
  • Any other ID issued by the State that includes the business name & address

* ATTN: California Customers may require additional documentation as part of the CA Health & Safety Code. Products that fall under this regulation will be placed on a mandatory 21-day hold after documentation is received. 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 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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