Drainage assembly with upward opening and flat seat without retention areas for enameled chemical reactor

An interchangeable drainage assembly for a cylindrical outlet orifice of one of an enameled chemical reactor having one of a flange type outlet (5) and a pipe outlet (4), for attachment to an exterior structure of the orifice, the drainage assembly comprising:

• a valve (8) comprising a head (10) for forming a fluid tight seal with a mating seating piece (11), the head (10, when in an open position, facilitating drainage of the reactor via an outlet orifice (6) of the reactor, and the head (10), when in a closed position, forming a fluid tight seal which facilitates fluid retention within the reactor and prevents flow through the outlet orifice (6);
• and
• the valve (8), the head (10), the seating piece (11) and a mechanical body (13) forming the drainage assembly;
• wherein the seating piece (11) is sandwichable between the reactor and an upper flanged portion (12) of the body (13) of the drainage assembly,
• the seating piece (11) is removable and is manufactured as a flat annular seal with a planar reactor abutting surface and a planar body abutting surface and a central opening (25) that extends axially from the reactor abutting surface to the body abutting surface completely through the seating piece (11),
• the seating piece (11) has a first conical ramp (23) which surrounds and slopes toward the central opening (25) and a second conical ramp (24) which surrounds and slopes toward the first conical ramp (23),
• at least a portion of the first conical ramp (23) engages with a mating conical surface of the head (10), when the drainage assembly is in the closed position, to form the fluid tight seal and prevent the flow of fluid through the outlet orifice (6), and
• the first seating conical surface (23) is disposed axially between the reactor abutting surface and the body abutting surface.

An interchangeable drainage assembly for a cylindrical outlet orifice of one of an enameled chemical reactor having one of a flange type outlet (5) and a pipe outlet (4), for attachment to an exterior structure of the orifice, the drainage assembly comprising:

• a valve (8) comprising a head (10) for forming a fluid tight seal with a mating seating piece (11), the head (10), when moved into an open position spaced from the seating piece (11), facilitating drainage of the reactor via an outlet orifice (6) of the drainage assembly, and the head (10), when moved into a closed position in abutting engagement with the seating piece (11) forming a fluid tight seal so as to facilitate retaining a fluid within the reactor and preventing flow through the outlet orifice (6);
• the valve (8), the head (10), the seating piece (11) and a mechanical body (13) forming the drainage assembly;
• and
• the seating piece (11) contacting a planar edge surface of the outlet orifice (6) forming a planar frontal surface (7), and the seating piece (11) being sandwiched between the planar frontal surface (7) of the reactor and an upper flanged portion (12) of the body (13) of the drainage assembly upon attachment of the drainage assembly to the outlet orifice of the reactor,
• wherein the seating piece (11) is removable and is manufactured as a flat annular seal which has a central opening (25) which passes completely through the seating piece (11),
• an upper surface of the seating piece (11), facing the outlet orifice (6), has a first conical ramp (23) which converges centrally toward the central opening (25) and a second conical ramp (24) which surrounds and slopes toward the first conical ramp (23),
• the head (10) has a mating head conical surface which, when the drainage assembly is in the closed position, engages with the first conical ramp (23) to form a completely fluid tight seal therebetween and prevent the flow of fluid through the outlet orifice (6), and
• both the first conical ramp (23) and the second conical ramp (24) slope toward the central opening (25) so as to facilitate drainage through the outlet orifice (6) of the reactor and avoid creation of any fluid retention area within the drainage assembly.