Example: dental hygienist
Section VI – Back-Up Rings
400°F). Thus, PTFE back-up rings may be used with most elastomeric O-ring seals. For installation, PTFE back-up rings are supplied either scarf or spiral cut as shown in Figure 6-1. These discontinuities may contribute to seal damage due to biting and pinching. PTFE can also impair seal lubrication by
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