For Pipe Slides, Equipment Supports, Architectural and Bridge Applications
RILOAD is a bearing material which is made by molding PTFE on each side and completely through a sheet of perforated stainless steel. RILOAD combines the sliding properties of PTFE with the strength and rigidity of steel.
Riload Bearing Pads Provide These Distinct Benefits:
- Excellent sliding properties with high strength and rigidity.
- Reliability in virtually any environment to 400°F.
- Non-weathering, non-aging, corrosion resistance.
- Simple, easy installation requiring no adhesives or bonding agents.
- Long life with little deterioration and freedom from lubricant washout.
Low Friction-High Load
The RILOAD surface provides a coefficient of friction as low as 0.02. The Stainless steel core provides rigidity and uniform strength in all directions resisting "cold flow" and stretch of the PTFE to the point that RILOAD bearing pads can carry loading in excess of 5,000 psi.
RILOAD bearing pads are non-lubricated. Unlike "permanently lubricated" or "prelubricated" bearing materials, RILOAD cannot suffer deterioration, contamination, or washout of lubricant.
RILOAD is unaffected by corrosives, solvents, temperature, (up to +400°F) moisture, sunlight, icing conditions and physical shock. The complete interlocking of the PTFE to its metal reinforcement eliminates the use of any adhesive in the construction of RILOAD and makes RILOAD independent of the quality variables and the environmental limitations of a cemented construction.
RILOAD can be positioned positively by conventional mechanical means such as screws, bolts, rivets, masonry nails or tack welds. This eliminates the potential problems inherent in cemented bearing pads.
RILOAD'S initial cost is low because it is a molded sheet requiring no machining; its installation cost is low due to the ease with which it can be fastened, and RILOAD maintenance costs are nil, because it requires no lubricant and is almost indestructible.
Go Green with Riload®
Riload® are the greener choice. Every bit of scrap produced in the manufacturing process of Riload bearing pads is recycled and renewable. Scrap PTFE is used in ink for ink pens and scrap steel is sent to a recycle mill to be turned back into productive products for industry use. Reduce your ecological footprint with TASK-LINE and Riload bearing pads.Download Brochure
Structural Bearing Pads
RILOAD bearing pads are used to accommodate horizontal movement due to expansion, contraction and vibration in many types of buildings, bridges, and other structures. RILOAD'S low and unvarying friction minimizes the forces imposed on support members, while its positive fastening and permanence provide assurance of satisfactory service for the life of the structure.
Storage tanks, heat exchangers, pumps compressors, and many other types of chemical refinery and general industrial equipment rest on RILOAD equipment supports. In these applications, RILOAD accommodates equipment movement in the most adverse environments with no maintenance and no diminishing of its bearing abilities.
Slides are used to support process, steam, refrigeration, natural gas and other types of piping which must move due to expansion or vibration. In this application, RILOAD bearings allow the piping system to be designed for unlimited horizontal movement against minimum restraining force. This, together with its temperature tolerance, its resistance to the elements and its freedom from maintenance, makes RILOAD an ideal pipe support slide.
Type 3 RILOAD is used for most bearing pad applications. Type 3 RILOAD has a nominal overall thickness of 3/32", consisting of 1/32" of PTFE molded on each side of a .030" sheet of perforated type 304 stainless steel. The composition used for type 3 RILOAD is black in color and contains 15% glass-reinforcement for optimum bearing properties.
Sizes and Shape
RILOAD is available in 14" × 18" sheets, used mainly for structural and equipment bearing. These RILOAD sheets can be sheared to size and formed into curved plates.
A RILOAD bearing set consists of two RILOAD pads sliding against one another. This provides complete inertness of bearing surface, thereby assuring constant bearing properties for the life of the installation.
In structural and equipment support bearings where the movement is relatively small, it is common practice to use rectangular pads dimensioned to provide adequate bearing area.
In pipe slide applications, where the movement may involve appreciable sidewise as well as lengthwise movement, a RILOAD pad large enough to accommodate the lengthwise movement is attached to a shoe on the bottom of the pipe and a second pad of length equal to the sidewise movement is mounted on the supporting structure at a 90° angle to the pipe. This allows the pipe complete freedom to move in the plane of contact between the RILOAD pads with the pipe weight supported by the area of contact.
To determine the bearing area for installations where the bearing surface temperature is below 300°F, a design load in the range of 100 to 500 psi is recommended. This usually results in an economical bearing size and yet is sufficiently conservative to handle any unanticipated load. Where unusually heavy loads must be supported or where higher temperatures are encountered, RILOAD bearings can be designed to support loading in excess of 5000 psi or to operate at temperatures up to 400°F.
The average RILOAD bearing pad installation has a coefficient of friction falling between 0.02 and 0.08 depending on the unit load, temperature, flatness and alignment of the bearing surfaces. We recommend that for design calculations a coefficient of 0.1 be used.
RILOAD pads are usually held in position by flat-head machine screws. Self-tapping screws, pull or drive rivets, Ramset fasteners and many other mechanical fastening devices can also be used.
Rectangular pads are usually held down at the four corners. Very large pads or long strip pads should have intermediate fasteners spaced on approximately 8 inch centers.
Where the fastener is within the area of sliding, the head must be recessed. This can be done by mounting the RILOAD pad on a support member provided with countersunk holes and pulling the RILOAD down into each countersink by means of flat head fastener.
|Mechanical Properties of Riload PTFE|
|Min. Tensile Strength (psi)||1,800||2,000|
|Tensile Elongation (%)||180||200|
|Compressive Strength (psi)
@ 0.2 Yield Stress
|Compressive Modulus (psi)||118,000||100.000|
|Flexural Strength (psi)
@ 0.2 Yield Stress
|Hardness (Shore D)||60-70||58-68|
|Physical Properties of Riload PTFE|