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AAA Technology provides low friction slide bearing plates for service conditions from -270° F to 1600° F (-168° C to 871° C). Properly sized slide bearing plates provide low frictional resistance to movement perpendicular to the plane of the bearing surface. An upper slide bearing should be attached to the bottom of the piping or equipment being supported and the lower slide bearing should be attached to the top of the supporting member (structural steel or concrete sleeper).
TRI*SLIDE™ slide plates are made of glass filled PTFE bonded to a steel backing plate. TRI*SLIDE™ slide plates are designed to reduce frictional resistance to movement at support or restraint points in piping systems and process equipment. When utilized properly, TRI*SLIDE™ slide plates will not show any significant wear during the expected life of the process plant. TRI*SLIDE™ slide plates are available in two basic styles for normal applications as follows:
|Type TF2 (75 psi to 2,000 psi)
Type TF2 is designed for applications where PTFE to PTFE slide plate surfaces are desired. The Type TF2 Slide plate consists of a 3/32" thick upper and lower PTFE slide plate element. These slide plates elements are typically bonded to 10 gauge carbon steel backing plates. The standard process industry practice is to make the upper element larger than the lower element by slightly more than the expected maximum movement. In fact, the practice is to ensure that the bottom element is never left uncovered by the upper element.
|Type TFSS (2,000 psi to 4,000 psi)
Type TFSS is designed for applications where a polished stainless steel plate moves across a PTFE slide plate. The Type TFSS slide plate consists of an upper Stainless Steel element and a lower PTFE element. The upper element is made of a 20 gauge Stainless Steel plate welded to a 10 gauge carbon steel backing plate and the lower element is made of a 3/32" thick PTFE slide plate bonded to a 10 gauge carbon steel backing plate. As with Type TF2, the standard process industry practice is to make the Stainless Steel upper element larger than the lower PTFE slide plate element by slightly more than the expected maximum movement.
|Construction Options for Type TF2 Slides
Standard TF2 slide plate assemblies are constructed per Table 1 where all thicknesses are specified in hundredths of an inch.
Type TF2 slide plate options are as follows:
▲ Slide Plate Thickness = 09, 12, 38
other Thicknesses of PTFE may be specified as well as any desired thickness of Virgin PTFE
▲ Backing Plate Thicknesses = 25, 38, 50, 75, 100
▲ Backing Plate Materials = Stainless Steel (SS) Hot Dip Galvanized Carbon Steel (HDG) & Aluminum (AL).
|Construction Options for a Type TFSS Slides
Standard TFSS slide plate assemblies are constructed per Table 2 where all thicknesses are specified in hundredths of an inch.
Type TFSS slide plate options are as follows:
▲ Upper Slide Plate Thickness = 03, 06, 07, 10, 12, 13
▲ Lower Slide Plate = 09, 12, 38 other Thicknesses of PTFE may be specified as well as any desired thickness of Virgin PTFE
▲ Backing Plate Thicknesses = 25, 375, 50, 75, 100
▲ Backing Plate Materials = Stainless Steel (SS), Hot Dip Galvanized Carbon Steel (HDG), & Aluminum (AL).
|Additional Construction Options
▲ Holes and Slots - If slide plates are specified at bolted connections, then bolts typically pass through the slide plates. One slide plate, typically the upper, will be slotted to allow for movement along the axis of the slots. The other slide plate will have hole in it to fix the plate in place while the other slide plate moves over it.
▲ Studs or Anchors - If stud or anchors are to be welded to the backing plate, specify a backing plate thickness equal to at least the diameter of the stud or anchor.
▲ High Temperature - If the surface temperature at the point of the slide plate exceeds 300 degree F, see the brochure TRI*SLIDE™ for High Temperature Applications.
Type TF2 TRI*SLIDE™ slide plates consist of two (2) PTFE plate pads bonded to backing plates with a lip all the away around the PTFE plates. With a 1/2" wide lip, the steel backing plate can be stitch welded or seal welded as desired.
Where Type TF2 TRI*SLIDE™ slide plates without a "Lip" are being installed, extreme care is to be taken to not exceed the 300 degree limit during stitch welding. A maximum weld of 1" for every 6" of plate edge is to be applied.
When excessive heat is applied to the steel, epoxy and PTFE during welding, the steel and the PTFE will separate. Whenever possible, Type TF2 TRI*SLIDE™ slide plates without a "Lip" should be installed using mechanical attachments or bonding with an appropriate high temperature epoxy. Contact AAA Technology for a recommendation in such cases.
In all installations where the backing plate is welded to a structural member to attach the slide plate, the plate slide surface must be protected from weld splatter as well as all foreign matter that would scratch or gall the slide surfaces. While awaiting installation, the PTFE surfaces should be stored where they are not exposed for prolonged periods to the direct rays of the sun. All PTFE surfaces and Stainless Steel slide surfaces should have a protective covering until installation is completed.