Gaskets safety

D. Little, Inc., report for Contract 210-76-0130 to the National Institute for Occupational Safety and Health(11) and are shown in Fig. 1. The cell was constructed of Pyrex 1720 glass with stainless steel membrane holders and stainless steel top covers. Gaskets for the cell were constructed from Teflon (trademark DuPont) with the test material placed between the gaskets and with the bolts tightened to a torque of 5 2.5 pounds. This torque was chosen because values less than 2.5 in pounds did not seal the protective material firmly,and torques greater than 7.5 in pounds would put such pressure on the material that it would tear or degrade rapidly at the points of contact. 

Replacement Gaskets to Improve Personnel Safety Had the Potential to Downgrade Process Safety... 

Carefully place the cell holder top-plate on the top gasket, drop the locking nuts into place and carefully tighten each in rotation. These are safety nuts and if you over-tighten them or if the back- and top-plates are not parallel, they will spring loose to prevent the NaCI plates being crushed. 

Use Automotive parts, gaskets, cable coating, mechanical rubber products, cover strips for tire side-walls, tire tubes, safety bumpers, coated fabrics, footwear, wire and cable coating, thermoplastic resin modifier. 

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