The unique system employs a stainless steel upper element sliding on a CHP lower element. This two element concept has seen worldwide acceptance for major pipeline, bridge, building and industrial applications. The system will yield long life under high load applications. This system gives the designer high pressure allowable loads even at design temperatures of 500°F.
The design engineer shall determine the square inches of bearing area required for the lower element by dividing the load by the allowable pressure from the graph. The upper element is sized for the movement after the lower element is sized for pressure. Size is out to out of back-up plate.
For ease of installation, CON-SERV recommends a back-up plate 1" larger than the PTFE size to allow a 1/2" recess all around. This recess must be provided for plates requiring a seal weld.
This bearing system has been tested in a long cycle friction apparatus. The coefficient of friction at 70°F for the load ranges indicated varies from 4% to 5%. This variation is due to the initial break-in period, not due to the variation in pressure.
When friction was recorded at the design temperature limit of 500°F, it was 2-1/2% to 1-1/2% depending on the dwell time at 500°F. It is interesting to note that friction decreases with increases in either load or temperature.
Certifications are available on this data upon request.
Type |
N/A CHP |
Element |
N/A Upper |
Slide Surface Thickness |
N/A 20 GA |
Slide Surface Material |
N/A Stainless Steel |
Back-Up Plate Thickness |
N/A 1/2" PL |
Back-Up Plate Material |
N/A Stainless Steel |
Size |
N/A 10" x 10" |
|
N/A
The Following Specifications for CON-SLIDE (Type CHP) Slide Bearing will give the engineer a quality product when installed: |
|
N/A
CON-SLIDE Bearings with PTFE flush with the steel back-up plate should be stitch welded only for attachment to the structure. A fillet weld 1inch long every 6inch on center each side of an element is satisfactory. Usually (1) tack weld each side is sufficient for elements 6inch on a side or smaller. The recessed PTFE type hearing can be stitch welded or seal welded. Minimize heal input into the bearing with a skip and fill technique for seal welding (300° for standard bond and 500° for HT Bond). A CON-SLIDE set usually consists of the large pad or element being the upper unit over the smaller lower pad, thus eliminating the possibility of accumulating dirt or contaminants on the interface. The bearings will function with a larger lower pad, however. The PTFE surfaces of the bearings shall be maintained clean and free from grit, dirt or grease. Bearing elements with slots or holes should be welded in place for location. The hearing slide surfaces must be protected during welding and maintained clean and free from foreign matter. The surface (if PTFE) must not be exposed to the direct rays of sunlight. Keep the PTFE surfaces covered. Remove vinyl masking from stainless steel slide- surfaces before final placement in the structure. Do not scratch or mar surfaces. |
