Pressure Relief/Check Valves

custom check valves

People Often Ask, What Makes Your Custom Check Valves Smart?


The answer is the ability to take customizable components, like the plastic body material and O-ring, and pair them with a precise opening pressure. This custom configuration coupled with a wide range of styles allows for millions of possible combinations to create an accurate and reliable low-pressure, low-flow check valve for a specific criterion.

Ideal for liquid or gas applications, our valves are featured in every industry, economical, FDA and NSF compliant, corrosion resistant, and able to withstand operating temperatures ranging from sub-zero to 400 °F depending on the materials specified. The thermoplastic materials used in these check valves provide improved corrosion resistance and make them a superior alternative to comparable metal valves.

The majority of our check valves incorporate a low-inertia poppet with double-tapered O-ring seats to achieve a fast, positive seal in ultra-low-pressure applications. Additionally, most of our check valves can also be used as pressure relief valves as long as the O-ring side vents to the atmosphere.

To ensure optimal valve performance every time, it is important to communicate any liquids/gasses used, application environment, and intended shelf life. The more we know about your low-pressure, low-flow needs, the better equipped we will be in selecting the right components to create a precise and accurate product exclusively for your application.


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custom check valves

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custom check valves

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custom check valves
Series 100 Standard Cartridge Check Valves

Standard cartridge and manual relief bleed valve styles. Easily inserted into fitting, manifold, or installed in-line.

  • Sizes range from 1/4" to 3/4"
  • 9+ plastic body material options
  • 7+ o-ring material options
  • 0.09 to 20 PSI opening pressure range
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custom check valves
Series 100 Specialty Cartridge Check Valves

Barbed, NPT, side seal, and flanged styles. Easily inserted into fitting, manifold, or installed in-line.

  • Sizes range from 1/8" to 5/8"
  • 8+ plastic body material options
  • 7+ o-ring material options
  • 0.09 to 20 PSI opening pressure range
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custom check valves
Series 200 NPT and Metric Check Valves

Male NPT styles plus metric options. Compression tubing adapter available for this series.

  • Sizes 1/8" and 1/4" plus metric M10 option
  • 4+ plastic body material options
  • 5+ o-ring material options
  • 0.09 to 20 PSI opening pressure range
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custom check valves
Series 300 Modular Check Valves

Barbed, NPT, & more styles. Our most popular series provides maximum versatility with the widest range of options.

  • Mix and match end fitting options
  • 6+ plastic body material options
  • 7+ o-ring material options
  • 0.11 to 20 PSI opening pressure range
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custom check valves
Series 500 Miniature Modular Check Valves

Flexible modular configuration - mix and match end fittings. Barbed & Luer styles.

  • Barbed sizes 1/16" and 1/8"
  • 4+ plastic body material options
  • 5+ o-ring material options
  • 0.09 to 20 PSI opening pressure range
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FAQs About Pressure Relief Valves, Our Processes, and Beyond

As your go-to manufacturer of custom liquid check valves, we want to ensure you have a high-level understanding of our products and specializations. With that in mind, check out some of the answers to our most commonly asked questions for more information.

What industries do you provide custom pressure relief valves to?

Smart Products is proud to provide custom low-pressure check valves to industries where reliability is crucial to the application. This includes industries such as:

So, no matter if you need liquid check valves for your medical devices or custom pressure relief valves for automotive brake systems, know that we have the capabilities to configure exactly what you’re looking for. Reach out to us to learn more about our custom applications.

What sets Smart Products USA apart from other low-flow check valve manufacturers?

When it comes to manufacturing custom low-flow check valves, you can trust that our team possesses the robust skill sets needed to supply you with an exceptional end product. This is because, at the end of the day, quality is our number one priority, and we are passionate about creating a reliable product for our customers.

Additionally, when you choose Smart Products, you’re selecting a team of experts who can carefully configure custom check valves to meet your needs. This can include working with most materials to create a product that is completely unique and able to withstand your specific application.

Can you tell me more about your process for making gas check valves and more?

Absolutely. When working with our team, you’ll be pleased to know that all of our custom gas check valves are manufactured in the United States, and that we ship both nationally and internationally. Plus, we pride ourselves on exceptional quality assurance, as there is minimal automation in our manufacturing process. This is to ensure that your finished product meets your stringent project specifications each and every time.

Beyond our extensive work creating low-pressure check valves, we also offer the following services for our customers:

Contact Smart Products USA for Liquid Check Valves and More

Ultimately, our team wants to ensure that you have the highest-quality products possible to meet the needs of your applications. So, start your order for custom check valves today or contact our team with any additional questions about our product line, as we look forward to assisting you.





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