12" x 16" x 1-1/4" Elliptical Black Max Manhole Gaskets - 2 Pack

Compared to spiral wound gaskets, BLACK-MAX gasket seal better and has much better recovery properties. And while spiral gaskets require near perfect conditions, BLACK-MAX gaskets seal on rough, pitted surfaces under less compressive load. Black-Max gaskets are made from multiple layers of foil-reinforced, exfoliated graphite and 316 stainless steel, ensuring gasket stability. The temperature range of the components and the recovery at broad temperature ranges (-400 to 1,200ºF Steam) allow you to use them in virtually any situation, in environments from cryogenic to steam. Gaskets are 1/4" Nominal Thickness Temperature - -400°F (-240°C) to +850°F (+454°C) in atmosphere,+1200°F (+650°C) in steam Pressure (Max) 2000 psig (70 bar) P x T (max) 175,000 (6,000) 1/4" M Factor 2 (smooth Flange Surface) Y Stress 900 psi (6 MPa) (Smooth Flange Surface) Maximum Gasket Load 24,000 psi (165 MPa) Material - Multi-Layer, High Strength 316SS Reinforced Graphite Black Max Spec Sheet