Engineering topics
Publications and source records attributed to Lerma, G..
Diaphragm seal retains flexibility throughout temperature range of -200 to +600 degree F (-129 to +316 degree C). Diaphragm durable, simple, versatile, and relatively inexpensive to manufacture. Suitable for refrigeration seals, autoclaves, storage lockers, and other sealing applications subjected to extreme temperature differentials.
Aluminum foil, tetrafluoroethylene (TEF), and glass fabric are vacuumbonded together to make composite covering material that is flexible, easy to handle, and unaffected by cryogenic temperatures.
Masking parts with Tetrafluoroethylene (TFE) tape allows easy removal of insulation; therefore, insulation can be used temporarily while testing of parts and then removed for their reworking.
Prefabricated polyurethane foam insulation is inexpensive and easily installed on cryogenic lines. Insulation sections are semicircular half shells. Pair of half shells is placed to surround cryogenic line. Cylindrically-shaped knit sock is pulled over insulation then covered with polyurethane resin to seal system.