| mceftuydw | Date: Tuesday, 2013-12-17, 2:58 PM | Message # 1 |
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| 1.It truly is rigid and generally scalloped. Often, such hose is manufactured using molded synthetic material (for example PVC) shaped in to a series of rings. This shape allows the hose to be somewhat flexible, without allowing it to collapse in on itself <a href=http://www.uggsoutletstores2014.net>UGG Outlet Store</a> under suction, to be a normal, woven-jacket fire hose would. 2.It uses suction gaskets.PU Duct hose Gaskets in standard <a href=http://www.uggoutletstores2014.com>Uggs outlet store</a> fire hose ("pressure gaskets") are created to minimize the water leaking out between couplings. The gaskets connecting hard suction hose sections, pump, and strainer must instead prevent air from entering with the coupling, since that would spoil the vacuum and <a href=http://www.uggonsale2014.net>UGGS On Sale</a> allow air in to the pump intake. Large diameter (4-inch (10 cm) or greater) hard suction hose will typically use Storz fittings, which can be genderless. 3-inch (7.6 cm) or smaller hard suction hose will typically use threaded fittings. In each case, the hard suction hose connection will match the fittings on the pump intake and supply hose, so that hard suction hose might be used in place of supply hose as appropriate.3.It really is short. Typically, hard suction hose comes in 10 feet (3.0 m) lengths, while fire hose comes in 50 and 100 feet (15 and 30 m) lengths. Since a fire engine's pump only produces a partial vacuum, it truly is only recommended for lifting water 3 metres (9.8 ft) or less. For this reason, and because each junction is an opportunity for just a crack or imperfect seal to spoil the vacuum, it's rare to see many sections of hard suction hose connected Clamped polyester ventilation duct together.4.It is not designed in order to use in fire streams. The airtight nature of hard suction hose, necessary for drafting, renders the hose unsuitable with the high pressure water flow needed to spray a pressurized stream of water with a fire. Thus, hard suction hose is tested for the ability to "prevent collapse under vacuum conditions" in lieu of its ability to function as being an attack hoseline
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