Valve housing modular system for providing one of several different functional or constructional configurations for a globe valve which is configured for adjusting a process fluid flow of a process plant, such as a chemical plant, a food processing plant, a power plant or the like, and which has a globe valve member (131, 231, 331) movable in translation along a stroke axis, wherein the valve housing modular system comprises: - a housing corpus with a process fluid inlet, a process fluid outlet and a process fluid passage arranged between the process fluid inlet and the process fluid outlet as well as an actuating opening for introducing the adjusting rod for actuating the stroke valve member (131, 231, 331) along the stroke axis; and - a housing cover for covering the actuating opening, which comprises a through opening extending in the direction of the stroke axis for receiving the adjusting rod and in particular a fastening section for mounting a particularly pneumatic adjusting drive or a yoke, a lantern or the like for carrying an adjusting drive, as well as - a plurality of different adapters (100, 200, 300, 400, 500) each for one of said different functional or constructional configurations, each of said adapters (100, 200, 300, 400) comprising a cylindrical retaining flange portion (111, 211, 311, 411) having a predetermined flange height (H F) and a predetermined flange diameter (D F), the housing corpus comprising a corpus interface adapted to the retaining flange portion (111, 211, 311, 411); wherein the housing cover comprises a cover interface adapted to the retaining flange portion (111, 211, 311, 411), wherein each adapter (100, 200, 300, 400) comprises a mounting collar (151, 251, 351, 451, 551) adjoining to the retaining flange portion (111, 211, 311, 411) in direction of the stroke axis A, which is designed to cooperate with a corresponding mounting inner surface of the housing cover, characterized in that a transition from the retaining flange portion (111, 211, 311, 411) to the mounting collar (151, 251, 351, 451, 551) is formed by a step extending in the direction of the stroke axis, the step having an outer diameter which is smaller than the flange diameter (D F) and larger than a mounting collar diameter (D K) of the mounting collar (151, 251, 351, 451, 551) and having a constant step height in the direction of the stroke axis. - a housing corpus with a process fluid inlet, a process fluid outlet and a process fluid passage arranged between the process fluid inlet and the process fluid outlet as well as an actuating opening for introducing the adjusting rod for actuating the stroke valve member (131, 231, 331) along the stroke axis; and - a housing cover for covering the actuating opening, which comprises a through opening extending in the direction of the stroke axis for receiving the adjusting rod and in particular a fastening section for mounting a particularly pneumatic adjusting drive or a yoke, a lantern or the like for carrying an adjusting drive, as well as - a plurality of different adapters (100, 200, 300, 400, 500) each for one of said different functional or constructional configurations, each of said adapters (100, 200, 300, 400) comprising a cylindrical retaining flange portion (111, 211, 311, 411) having a predetermined flange height (H F) and a predetermined flange diameter (D F), the housing corpus comprising a corpus interface adapted to the retaining flange portion (111, 211, 311, 411); wherein the housing cover comprises a cover interface adapted to the retaining flange portion (111, 211, 311, 411), wherein each adapter (100, 200, 300, 400) comprises a mounting collar (151, 251, 351, 451, 551) adjoining to the retaining flange portion (111, 211, 311, 411) in direction of the stroke axis A, which is designed to cooperate with a corresponding mounting inner surface of the housing cover, characterized in that a transition from the retaining flange portion (111, 211, 311, 411) to the mounting collar (151, 251, 351, 451, 551) is formed by a step extending in the direction of the stroke axis, the step having an outer diameter which is smaller than the flange diameter (D F) and larger than a mounting collar diameter (D K) of the mounting collar (151, 251, 351, 451, 551) and having a constant step height in the direction of the stroke axis.