OLS Models MD1, MD2 & LD1

Features
• Robust construction with high quality material
• Non-metallic bearings prevent metal-to-metal contact
• Reliable with stainless steel or non-metallic components for moving parts
• Available with horizontal or vertical blades
• Modular design for easy assembly
• Specially rolled-formed blades guarantee performance or dampers
• Square shafts prevent slip between blades and axles, and operator and axle.
• No obstruction of blade movements
• Gear-action manual operator for large dampers
• Performance-rated
• Low pressure loss
• Low leakage


Construction
The dampers are constructed of high quality hot-dipped pre-galvanised steel sheet. Damper frames are constructed of 1.2mm-thick cold-formed ‘C’ channels for single-module dampers and 1.5mm-thick for multiple-module dampers. The channels are mechanically fastened at each corner.
The standard depth of frame ‘d’ is 150mm and other frame dephs are available upon request. The blades are constructed of 1.2mm-thick galvanised steel specially roll-formed with three grooves designed for better rigidity with three grooves designed for better rigidity.To minimise air leakage for LD dampers, stainless steel compression jambs seals are incorporated on the vertical frames and profile EPDM or PVC seals on the blade edges. The blades with 12.7mm2 plated steel axles at each end pivot on the non-metallic nylon bushes. Interconnecting blade linkage mechanism consists of galvanised steel brackets fastened to the blade axles outside the air stream and linked together by glavanised steel bar, which is connected to each bracket with astainless steel pin.
For connection to manual operator, electric or pneumatic actuator, dampers are fitted with standard 12.7mm × 100mm extended square drive shaft. Manually operated dampers of up to 1200mm × 1500mm are supplied with a factory-installed gear action operator. The maximum sizes of a single module MD2 dampers are 1200mm × 1830mm, and the LD1/MD1 dampers are 900mm × 1869mm. Larger dampers are constructed of panels, consisting of multiple modules, up to a maximum factory-assembled size of 2400mm × 1200mm.

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