The New Chem Flow TFF lined relief valves were developed for use on systems requiring the corrosion resistance compatibility offered by TFF. The operating principle is the same as used in our regular line of corrosion resistant relief valves made of borosilicate glass. A simple flange connection is provided for safe venting and after every operation, the valve resets itself without the labor or material cost of a rupture disk replacement. The Chem Flow patented seal assures a perfect seal against liquids and gases.