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Mica Gaskets

Mica gasket material is exceptional in it resistance to high heat. At temperatures over 900 F the ideal sealing material Grafoil® or flexible graphite cannot be used. Flexible graphite or Grafoill® will coke at those elevated temperatures when oxygen is present, where mica gasket material will not (900 - 1850 F).

Mica gasket material is an excellent alternative in these high temperature (to 1800 F) applications. Some of the basics on Mica are shown below. As a gasket material Mica can be very effective in sealing those high temp critical applications with out failing due to the presence of oxygen.

Mica comes in multiple forms.1) Laminated (2) Flexible and Ridgid. The Mica image above is a laminated Mica and tanged Stainless Steel combination which is a premium grade for higher pressures. Mica is also combined with a polymer by heat treatment to create a Flexible Mica sheet. Mica is also available as a ridgid product. The best mica for you depends on your application.

Mica Gasket

Mica is a mineral, which offers a wide range of exceptional properties.

You may find that some of the properties of mica could improve the different products in your range.

Mica which comes in the form of flakes is completely harmless and presents very high thermal and mechanical performances, allowing it to successfully replace asbestos gasket material in many applications.

American Seal & Packing offers a wide range of gasket materials, each corresponding to specific requirements and designed for a well-defined application. American Seal & Packing can assist you in determining which mica gasket material (or other material) corresponds best to your application.

Mica Thermal Properties - Withstands heat up to temperatures of 1850oF (1000oC). - Resists fire without burning. - Low heat conductivity.

Mica Electrical Properties - Insulating strength better than 25 kV/mm. - Good resistance against arcing and arc erosion. - Permeability to microwaves.

Mica Chemical Properties - Very good compression resistance. - Good tensile and bending strength. - Large elasticity modulus.

Mica Thermal Properties -

Withstands heat up to temperatures of 1850oF (1000oC).

     Resists fire without burning.

     Low heat conductivity.

Mica Electrical Properties -

Insulating strength better than 25  kV/mm.

     Good resistance against arcing and arc erosion.

     Permeability to microwaves.

Mica Chemical Properties -

Very good compression resistance.

     Good tensile and bending strength.

     Large elasticity modulus.

Call us directly or order Mica gasket material online today!
American Seal & Packing (714) 593-9780

When it comes to cutting gaskets there are several ways to get the job done. Traditional "clicker presses" are great for larger quantity jobs and have been the standard in the industry for years. The biggest down side to using clicker presses is tooling must be made to produce a gasket. Just as CNC lathes revolutionized the machining industry, laser cutters, routers and water jet are all computer controled ways of cutting a gasket with out the need for tooling or dies.

Laser Gasket Cutting

 

Specialized sealing products like Grafoil® flexible graphite, FKM, Ameri-lon®, and more common materials for cut gaskets like: PTFE, Expanded PTFE, filled PTFE, FKM, Viton®, silicone, rubber, buna, EPDM, cork, fish paper, vegetable fiber, and non-asbestos Cut Gaskets.

If you have a cut gasket application that requires more than traditional solutions, let our team of cut gasket professionals help.

Manufacturers we represent

Flow Serve, Borg Warner, Durametallic, AST, Utex Industries, JM Clipper, Sepco, FMI, Pure Flex,  Parker, Leader Gasket, Burgmann.

Though trading partners we can also offer Flexitallic, Garlock, A.W. Chesterton, Anchor, and other major brands.

Mica Cut Gaskets 

Fills the space between two objects, generally to prevent leakage between the two objects while under compression. Cut Gaskets saves money by allowing less precise mating surfaces on machine parts which can use Mica Cut Gaskets to fill irregularities. Mica Gaskets are commonly produced by cutting from Mica sheet. Mica has two basic forms Phlogopite mica and Muscovite mica.

Phlogopite or Muscovite mica impregnated with an outstanding high temperature resistant silicone resin provides a softer more conformable gasket.

It is usually desirable that the gaskets be made from a material that is compressible such that it tightly fills the space it is designed for, including any slight irregularities. The most common misconception when selecting a Cut Gasketss thickness is to choose a Cut Gaskets that is too thick. The thicker the material the more likely the material being contained can weep through the pores of the Cut Gaskets itself. This is a greater issue with some materials than others.  A rule of thumb is to have the material thick enough to compensate for any surface face irregularities and to permit some compression.  The required compression for your Cut Gaskets will depend many factors including:

1)Mica Gasket Surface area

2)Pressure being sealed by Mica.

3)Size of bolts (assuming bolts are being used)

4)Number of bolts

5)Condition of the bolts

6)Lubrication on the bolts

All must be considered when determining torque.  Torque data must be determined using all of the above and should be provided by an engineer using M&Y data we can provide. 

In most cases unless your gasket is a standard ANSI or API flange using Ring or Full Face gaskets torque data will be difficult to come by (due to staffing and the fear of law suits).  In most cases the old tighten it tight enough to stop any leaks but not too tight as to completely crush the gasket is generally accepted.

Over compression of Cut Gaskets is a common problem with metal gaskets which have mechanically designed recovery built into the gasket. This applies to mica filled spiral wound gaskets.  Over compression removes the Cut Gaskets ability to recover.

The common strategy of "The more compressive load exerted on the gasket, the longer it will last" is generally true of elastomeric materials since elastomers (rubbers) are not compressible but deflect compression.  Many materials such as non-asbestos compressed Cut Gasketss and beater addition (ie; Armstrong) materials contain elastomers in the mix of material they are produced from, making them difficult to over compress.

One of the more desirable properties of an effective Mica Gaskets in industrial applications is the ability to withstand high compressive loads. Most industrial gasket applications involve bolts exerting compression well into the 14 MPa (2000 psi) range or higher. This is why mica Cut Gaskets are so widely used in industrial Cut Gaskets applications.

American Seal & Packing Cuts Gaskets of all types, Including: PTFE, compressed non-asbestos, vegetable fiber, beater add, cork, and various rubbers - Nitrile, Buna-N, SBR, EPDM, Viton®, FKM, Hypalon, Aflas®, natural rubber, closed cell, open cell, Neoprene, GRAFOIL® Flexible Graphite and other "soft goods". Gaskets can be cut based on your drawing or sample of the gasket you desire. Basic I.D x O.D shapes can be cut by hand however most gaskets require a die. Mica Gasket materials are available in rolls or on pallets depending on type and quantity. Name brands we can provide include;Thermoseal, Klinger, Johns Manville, FMI, RM, Detroit, Utex and GRAFOIL® Flexible Graphite among other gasket styles. So, if you want a cut gasket or gasket material so you can cut your own, we can help.

Call us directly or order Mica gasket materials online today!
American Seal & Packing (714) 593-9780

 

 

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American Seal & Packing, Inc., Santa Ana,, CA 92705   714-593-9780

A California based, U.S. Supplier of Mica Gaskets, Mica Gasket Materials