For engineers and procurement teams who need the detail before they specify. Material grades, system logic, tolerance design, and assembly mechanics.
In a thermal break profile, the aluminium extrusion is split into two sections — inner and outer — separated by a PA6 GF30% nylon insert. The nylon prevents heat conducting across the frame, reducing the temperature differential between inner and outer faces. This cuts condensation risk and improves thermal transmittance classification under EN 1886:2007.
In a non-thermal break profile, aluminium runs continuously from inner to outer face. Fine for applications where condensation and energy rating are not specification requirements.
Each series is a matched set of four components. Tolerances at every interface designed together — not specified independently.
In the 50-25-SF series, panels do not require screw-through fixing. The panel geometry clips into the profile channel during assembly. The Panel Fixture (VS50-25-SF-PS) — an aluminium retaining strip — seats in the outer channel to lock the panel without penetrating its surface.
The result: no exposed fastener heads on the internal face, no surface break, no contamination risk. Primary specification for cleanroom and pharmaceutical AHU construction.
The Base Profile forms a fixed rectangular frame within the duct opening. The Shoulder Profile spans the frame and carries the pivot bushes at each end. The Blade Profile sits across the opening, supported through the H-Bush and Blade Plates.
The Gear connects the external Handle to blade rotation — turning the handle rotates the blade from fully open to fully closed, modulating airflow. The Stopper Stick limits travel at both ends. In wider assemblies, the Intermediate Profile adds a mid-span support point to prevent blade deflection under airflow pressure.
Available on the 45-25, 50-48, and 50-25 series. The Section Joining Corner Joiner and Profile allow two separately assembled frame sections to be mechanically joined on site without structural compromise. The section joining profile has a reduced nominal dimension to fit within the joint zone.
Share your panel thickness, thermal requirement, and operating environment. We’ll identify the right series.