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To further control dust emissions, install an additional hood above the area where the wood is processed. To increase the effectiveness of this system, add a narrow hood and a stripper. [3] Routers. Place two open-faced hoods behind the heads of the router table. Connect the hoods to the exhaust ductwork via a flexible hose. [3]
When not in use, the hose is loosely coiled around a wire rack mounted on a closet wall, or on the back of a door. An alternative for storing vacuum hoses is the "Hide-A-Hose" system, which uses suction to draw the hose into the vacuum piping in the wall for storage. Hose lengths used are typically 30/40/50 ft (9/12/15 m).
In 2002 in Missouri, a flex hose ruptured during unloading a train car at a chemical plant, releasing approximately 16,900 pounds (7,700 kg) of chlorine gas. 67 persons were injured. [1] In 2004 in Macdona, Texas, a freight train accident released 9,400 US gallons (36,000 L; 7,800 imp gal) of chlorine gas and other toxic chemicals. At least 40 ...
Only the hose and cleaning head need be carried from room to room, and the hose is commonly 8 m (25 ft) long, allowing a large range of movement without changing vacuum inlets. Plastic or metal piping connects the inlets to the central unit. The vacuum head may be unpowered, or have beaters operated by an electric motor or by an air-driven turbine
These centralised systems consisted of an air exhauster, a dust filter (with detachable dust container), and wrought iron pipes run through the building, to which flexible hoses could be fitted for use in individual rooms.
Since the duration of the compressed-air burst is short (about 0.1 seconds), it acts as a rapidly moving air bubble, traveling through the entire length of the bag and causing the bag surfaces to flex. This flexing of the bags breaks the dust cake, and the dislodged dust falls into a storage hopper below.
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