Patent Number 5,746,252 Awarded for a “Three-Way Hot Air Divert Valve” that makes process changes easier on extrusion lines

May 1998: Dale Henson, of San Jose Ca, invented a 3-way valve that can withstand the high temperatures associated with in-line process heating (up to 1,000o F).  When an air heating process has to interrupt air flow in response to a line stoppage the heater can burn up unless the power is turned off.  It is then necessary to reestablish prope...

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