... welded with the plastic components, all the vents in the production line must be tested before delivery to customers.ePTFE membrane ... tooling design and cost. protective vents has been widely used in protective automotive electronics unit or control module, Vents allow ... into 4 rates ,IP65, IP67, IP68, IP69 protection class,, in line with GB4208-2008/IEC60529: 2001 "Degrees of protection provided by ...