Mechanical Seals

Our mechanical seals come in a wide assortment of shapes and materials. Mechanical seals are typically recommended for long-term installations and the most critical sealing applications as they are externally mechanically-actuated (they cannot leak internally due to the absence of an inflation medium).

Typical Applications:

  • Long-term sealing and isolation
  • Manual actuation and installation when inflation mediums are not available
  • Large face seals for power generation intake repair and coffer dams
  • Oil industry mud isolation and packing seals
  • High temperature welding isolation
  • Low, medium and high-pressure designs field proven to several thousand PSIG test pressures
  • Flange seals and gaskets
  • Lifting and product handling equipment
  • Automated industrial testing

Custom Molded Solutions

As with our inflatable seals, we can custom mold mechanical seals out of nearly any material and in nearly every shape.

Available Extrusions:

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Extruded O-ring cross-sections from .07" to over 5"

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Wedge and J-bulb profiles in stock today

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Flat sheet and molded materials available to meet every application

Custom Solutions

Our design and fabrication team has been involved in some of the most cutting-edge sealing design challenges in the world.

Available in a wide variety of materials:

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Ethylene propylene (EPDM)

N

Chloroprene (Neoprene)

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Buna-N (Nitrile)

N

Natural rubber

N

Silicone

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Butadiene Styrene (SBR)

N

Fluorinated Hydrocarbon (Viton®)*

* Viton® is a registered trademark of Du Pont Dow Elastomers

At Mechanical Research & Design, we’re proud to offer mechanical seals in a wide assortment of shapes, sizes, and materials suited to almost any application. In addition to our stock products, we can also create custom solutions to meet unique application needs.

How Mechanical Seals Are Used

Though small in nature, mechanical seals play a crucial role in any type of sealing job. Typically used for rotating equipment, such as pumps, compressors, and mixers, mechanical seals help to prevent potentially hazardous gas and fluid leaks. Because these seals are mechanically actuated externally, they can provide optimal protection against leaks even in equipment with the strictest sealing requirements. The unique design ensures seals cannot leak internally.

Mechanical seals are comprised of two main components: The first part remains stationary, while the second rotates against the first, creating the seal. Mechanical seals are installed by adhering one of the components to the pump housing, using a static seal. The other rotary component is then attached to the shaft of the machine. When the machine is in operation, the stationary piece and the rotary piece press against each other, most often using spring pressure.

On both components, the faces are manufactured via high-precision machines, allowing for an extremely thin, smooth design. As the two seal components press together, the flatness helps prevent leaks. While some leakage is inevitable, it is inconsequential and does not affect overall efficacy or reliability.

Common Applications for Mechanical Seals

Mechanical seals can be used in a wide range of rotation equipment, but they are most often used in long-term installations. Some of the most common applications include:

  •    Long-term sealing and isolation
  •    Manual actuation and installation when inflation mediums are not available
  •    Large-face seals for power generation intake repair and cofferdams
  •    Oil industry mud isolation and packing seals
  •    High-temperature welding isolation
  •    Low, medium, and high-pressure designs, field-proven to several thousand psig test pressures
  •    Flange seals and gaskets
  •    Lifting and product handling equipment
  •    Automated industrial testing

Mechanical seal manufacturers determine the details of a seal’s design — including its material selection and positioning — through the careful consideration of several factors, such as the pressure and temperature involved, as well as the rotational tempo and the type of equipment receiving the installation.

Material Options for Mechanical Seals

At Mechanical Research & Design, we can manufacture mechanical seals from several different kinds of materials. This wide range of options helps ensure that each seal is an ideal fit for its particular application. Below are some of our most popular material options.

  •    Ethylene propylene (EPDM)
  •    Chloroprene (Neoprene)
  •    Buna-N (Nitrile)
  •    Natural rubber
  •    Silicone
  •    Butadiene styrene (SBR)
  •    Fluorinated hydrocarbon (Viton®)

We also offer a number of extrusions to provide enhanced seal customization opportunities for our customers. Options include extruded O-ring cross-sections from .07 inch to over 5 inches, wedge and J-bulb profiles, and flat sheet and molded materials available to meet every application.

Learn More

Since our founding, Mechanical Research & Design has been dedicated to delivering the highest-quality custom solutions available. We are proud to be leaders in the industry among mechanical seal manufacturers, specializing in the development, testing, and fabrication of isolation and test tools — seeing them from the initial idea stage to the final production of applied, working solutions.

Our skilled team can create custom mold mechanical seals from nearly any material, in almost any shape and size, to fit unique specifications and requirements.

Looking for a mechanical seal manufacturer who can work with you to find the ideal seal solution for your specific job? Request a quote today to learn more and discuss your options with an expert.

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