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Industrial Flow Restrictors

Porous metal flow restrictors are used in applications that require anti-clogging or laminar flow. Thousands of flow paths through the porous metal will prevent the restrictor from clogging if a large particle makes it into the gas stream. This thousand pore structure also ensures laminar flow in even the most intense conditions and eliminates turbulent flow on the outlet. Restrictors are available in a wide variety of alloys and hardware configurations to fit into your process.

Information Request

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Literature & Data Sheets

Typical Applications

Flow Restrictor Data Sheet

Overview of customization options and capabilities of Mott flow restrictors

Lab and Engineering Services

Rapid Prototyping, SEM/EDS Analysis, Cleanliness Testing, Quantitative Chemical Analysis, Filtration Performance and Feasibility Testing, Mechanical Properties Testing, Media Characterization, Failure Analysis and Lifecycle Testing, Metallography

Capabilities Brochure

Overview brochures of Mott markets served, applications, products, materials, and engineering capabilities

Product Specs

Compatible Flow Rates

Mott can tune restrictors to virtually an infinite number of flow rates. Consult with a Mott representative to procure a flow restrictor that’s right for your process conditions.

Flow Accuracy

Mott restrictors are typically +/- 7.5% of the specified flow rate. Ultra-high accuracy restrictors can be manufactured upon request with accuracies down to 1%. For ultra-low flow rates, broader accuracy ranges may be required.


Common hardware – Varying encapsulated sleeves, tube unions, male adapters, and hex nipples are available


Common alloys – 316L SS, 304 SS, Hastelloy® C-276, Hastelloy® C-22, Hastelloy® X, Monel® 400, Nickel 200, Inconel® 600

Custom alloys available upon request, consult factory

Operating Temperatures

Alloys with temperature resistance up to 1400° degrees Fahrenheit are available.

Custom alloys available to accommodate unique operating temperatures, consult factory

Our Design Capabilities

  1. Application Engineering – Need consultation on your design? Our team of application engineers are ready to help you determine the right part for your design. With decades of experience working with the world’s largest technical and performance brands, we’re eager to solve complex problems with you as well.
  1. Customer Innovation Center – We enjoy working with customers on complex projects. In fact, we’ve dedicated an entire facility to it. Want to join us for various lab testing and engineering consultation sessions? Visit our Customer Innovation Center in Connecticut to develop a solution for your unique application.
  1. Rapid Prototyping Cell – Trying to determine the feasibility of your design as fast as possible? Use our rapid prototyping cell to turn around prototypes in as little as 2 weeks. Our engineers will work with equipment similar to our manufacturing facility to provide with you with manufacturable, economical design.
  1. Additive Manufacturing – If you’re looking for the most uniform porosity or a non-traditional design, look no further than working with out porous 3D printing team. We can create controlled porosity designs with various density gradients in non-traditional shapes to satisfy the most unique design request. Our technology allows us to print parts with both solids and porous in a single print cycle

Relevant Services

Lab Testing – If you need data packages or feasibility testing for your part prior to installation, we’re happy to work with you. We’ll use our lab center to perform various characterization and performance tests to ensure your parts are meeting strict specifications prior to you receiving them.

Computational Fluid Dynamics – If you would like to model your process fluids interaction with your Mott requested part, ask your Mott representative how we can model it using CFD software.

Engineering Memberships – If you’re constantly working on complex designs that require the highest standards of engineering support, ask about our membership rates to our lab, which will allow you discounted rates to various lab testing, prototyping, and engineering resources.