CHARACTERISTICS: Volume control dampers 150 mm pitch. ARTICLE DESCRIPTION: SRC150-P: opposed blade damper with pin for servo-motor (standard). SRC150-C: opposed blade damper with manual control. SRC150-PP: parallel blade damper with pin for servomotor. SRC150-PPC:parallel blade damper with manual control. T10: veneered blades. (price increase +30%) CONSTRUCTION: Galvanized steel frame. Galvanized steel blades. Nylon spindles (on request steel spindles for high temperatures) FIXING: By bolts on flanges corners. DETAILS: Drive: Counter rotating or parallel movement driven by manual control or servomotor.