The APV K34 gasket is pasted on corrugated plate. They are designed into 2-pass seal structure with signal holes. When the media leaks from the 1st sealing, if it comes out from the signal hole. You'll find out problems in time and deal with them. No media mixing up occures, and it do not let the medias mixed. The seal gaskets are made by different kinds of rubber adapted to different medias and operating temperature.
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