PTFE sheet gasket material comes in several forms. The first thing that must be determined is what type of PTFE gasket material your looking for. The first and most common form is a virgin PTFE gasket material. Virgin PTFE is specified for medical or electrical applications. Most applications however are not medical or electrical and can easily be satisfied with mechanical grade PTFE.
Mechanical grade PTFE is almost identical to Virgin PTFE and to the naked eye is very hard to differentiate. The difference is in mechanical grade reprocessed PTFE has been added. Generally a very small percentage of the material is reprocessed. The percentage will very however by manufacturer.
Some applications call for thinner material. While PTFE gasket material is exceptional in it's range of temperature (to 500 F) and PH range (0-14) it has limitations on the thickness available. Most PTFE sheet is skived off of a roll. Some material is molded but this is generally limited to 24" x 24" or 12" x 12" sections.
PTFE Film is another product that has the same or similar properties but is made in very thin and produced in rolls. We offer PTFE Film in .001" to .025" thick. The next size above .025" we offer is .032" which we then term as sheet PTFE gasket material.
Expanded PTFE - EPTFE Gasket material is a soft and conformable material that is ideal for applications with limited bolt load torque available. Or in applications such as glass lined pipe where excessive bolt load will cause more problems than it will solve. If you have never touched this exceptional sealing material think of a dense marshmallow. It has the same chemical resistance and temperature range as any PTFE but it is soft and will effect a seal much quicker than regular PTFE gasket material
HS10 Bidirectional PTFE - The most common brand is Garlocks Gylon but there are now 4 manufacturers world wide, Garlock, Teadit, FMI-SPA, and Flexitallic. We can supply any of them.
|WHAT IS TEFLON®? WHAT IS PTFE?
WHAT IS TEFLON®?
Teflon® is a registered trademark of The Chemours Company and is used in relation to products manufactured with The Chemours Company’s fluoropolymer resins.
What is PTFE?
PTFE stands for PolyTetraFluoroEthylene, which is the chemical term for the polymer (CF2)n.
Polytetrafluoroethylene (PTFE), (The Chemours Company’s trademark of Teflon®) is a thermoplastic member of the fluoropolymer family of plastics. PTFE has a low coefficient of friction, excellent insulating properties, and is chemically inert to most substances. It also can withstand high heat applications and it is well know for its anti-stick properties.
Other trademarks, in addition to The Chemours Company’s trademark Teflon®, of PTFE resin and their manufacturer are:
|AGC Chemicals Americas, Inc. (AGC). They have plants in the U.S., England, and Japan.
|Dyneon, a 3M Company, produces PTFE resin in Gendorf, Germany. This plant has operated since 1964, founded by Hoechst AG and resin formerly trademarked as HOSTAFLON®.
|Daikin Industries Ltd. has been producing PTFE resin since the 1960's in Japan and since 1994 in the U.S as Daikin America Inc.
|Solvay Solexis, formerly Ausimont, has plants in the U.S. and Italy. Ausimont was purchased by Solvay.
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American Seal & Packing (714) 593-9780
When it comes to cutting PTFE 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. Lasers cut PTFE exceptionally well.
PTFE 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 Cut Gaskets to fill irregularities. Gaskets are commonly produced by cutting from sheet Cut Gaskets, such as gasket paper (beater addition), Non-asbestos, Rubber, EPDM, Nitrile, Buna, Neoprene, Flexible Graphite, Grafoil®, Aflas, Kalrez®, Viton®, Silicone, Metal, Mica, Felt or a plastic polymer such as (PTFE), Peek, Urethane, or Ethylene Propylene (EP). In the past, the Cut Gaskets selected for specific applications may contain have contained asbestos.
Over compression of Cut Gaskets is a common problem with metal gaskets which have mechanically designed recovery built into the gasket. Over compression removes the Cut Gaskets ability to recover. This is also true of PTFE, once over compressed it will have no recovery and therefore will not longer adapt to maintain a seal.
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. PTFE is not an elastomer. For best performance the proper load should be calculated. produced from, making them difficult to over compress.
One of the more desirable properties of an effective PTFE Cut Gaskets in industrial applications is compatibility of PTFE with most chemicals. With it's temperature range of 450 - 500 F it's an universal material for industrial applications below 500 F.
American Seal & Packing Cuts Gaskets of all types, Including: PTFE, compressed non-asbestos,EPTFE vegetable fiber, Expanded PTFE, 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".
PTFE 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.
Gasket materials are available in rolls or on pallets depending on type and quantity. Name brands we can provide include; Klinger, Teadit, Johns Manville, FMI-SPA, 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 PTFE gasket materials online today!
American Seal & Packing (714) 593-9780
Strong, Resiliant, Reliable