VK-100 shutter self adj.

VK-100 Self adjusting Louvre shutters for vertical mounting on a wall. The profiled vanes produce a strong upward force which reduces the air resistance. This means that the vanes opens fully at low air velocities as well. All the parts are manufactured in weather-resistant and shockproof nylon material (PVC containing special synthetic). The robust construction ensures that the vanes will not become deformed or loose. Above size 45, the vanes are fitted with a cast counterweight. Air velocity should not exceed 12 m/s. The louvre shutters are easy to install. Wall plugs and screws are included above size 15.