This style is composed of a grooved metal core with a layer of graphite or other composition sheet material on both sides. They are ideal for standard pipeline and heat exchanger applications. There are 3 standard styles of this gasket. Ring, Fixed Guide Ring and Floating Guide ring. Kammprofile gaskets have excellent compression and recovery characteristics, maintaining joint tightness under pressure and temperature fluctuations, temperature differential across the flange face, flange rotation, bolt stress relaxation, and creep. Kammprofile gaskets consist of a sealing core metal with or without a guide ring. The sealing core is a solid metal gasket with concentric serrations on both sealing surfaces and faced with soft material such as flexible graphite, ePTFE or other materials depending on operating conditions. Handles pressures from vacuum to Class 2500 and temperatures cryogenics to 2000°F (1090°C)- depending on the sealing material and the metal.