Specification Brand : Boiler Supplies.com BulletPoint1 : Material: Reinforced exfolilated graphite foil BulletPoint2 : Temperature: up to 636°F (336°C) in steam boilers; up to 850°F (454°C) in atmosphere BulletPoint3 : Pressure: 250-2,000 psig (17-138 bar) BulletPoint4 : Max Gasket Load = 24,000 psi (165 MPa) BulletPoint5 : The proprietary graphite used to manufacture BLACK-MAX is chemically inert (pH 0 -14) and resistant to chemicals used in treating boiler water. Color : Black ExternallyAssignedProductIdentifier1 : 742839527579 ExternallyAssignedProductIdentifier2 : 0742839527579 ExternallyAssignedProductIdentifier3 : 00008236424928 ItemName : Black Max Obround Boiler Handhole Gaskets 1/2" Flange (6 Pack) (3" x 4" x 1/2" O) ItemPackageDimensions_Height : 1 inches ItemPackageDimensions_Length : 18 inches ItemPackageDimensions_Width : 24 inches ItemPackageQuantity : 1 ItemShape : Oblong ItemTypeKeyword : sheet-gaskets LowerTemperatureRating : 400 degrees_fahrenheit Manufacturer : Topog-E Material : Reinforced exfolilated graphite foil ModelNumber : BKMX-BG 12" X 16" X 1.25"-E 1 NumberOfItems : 6 NumberOfPieces : 20 PackageLevel : unit PartNumber : Black Max 1/2" O Flange ProductDescription : The steam boiler market makes extreme demands on gaskets; Black Max gaskets are specifically designed and fabricated to provide the superior performance users of Black Max gaskets have come to expect – but at higher operating pressures and temperatures. These branded, engineered gaskets provide a cost-effective, reliable, and easy to use alternative to tacky-cloth, spiral wound and expanded PTFE gaskets. Black Max gaskets can be used as a cost-effective sealing alternative in most types of higher pressure industrial vessels and tanks that have inspection openings. The proprietary graphite used to manufacture these gaskets gives them exceptional thermal stability combined with chemical inertness, ensuring superior service capability under simultaneous conditions of saturated and superheated steam. They provide boiler manufacturers, users and service companies handhole and manhole gaskets with unprecedented characteristics. Compared to spiral wound gaskets, Black Max gaskets are compressible enough to conform to the topography of the mating surfaces – even on old worn and pitted flanges – with less torque. Their recovery characteristics are also superior to spiral wound gaskets and they are significantly lighter than spiral wound products. Black Max gaskets are easy to remove and replace with no chiseling or buffing required. Sizes are clearly marked on each gasket for easier identification. ProductSiteLaunchDate : 2014-09-23T00:00:01-07:00 Size : 3" x 4" x 1/2" O SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 6 UnspscCode : 31400000 UpperTemperatureRating : 636 degrees_fahrenheit WasherType : Sealing