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In order to be "matched" all sprinkler heads in a given zone must have the same rate of precipitation. This can be achieved by matching the gallonage of a standard rotor to its arc and reducing range accordingly (i.e. 2 gallons at 90 degrees, 4 gallons at 180 degrees, or 8 gallons if the head does a full circle) or by using MPR nozzles or ...
The pin index safety system uses a face seal between the cylinder valve and the associated yoke clamp. There are two holes in specific positions on the cylinder valve body below the outlet port , in positions associated with the gas mixture, which prevent connection of the cylinder to a yoke or pressure regulator with a mis-matched set of pins.
A fire sprinkler mounted on a ceiling. A fire sprinkler or sprinkler head is the component of a fire sprinkler system that discharges water when the effects of a fire have been detected, such as when a predetermined temperature has been exceeded. Fire sprinklers are extensively used worldwide, with over 40 million sprinkler heads fitted each year.
A fire pump usually refers to a pressure-increasing component of the water supply for fixed-place fire suppression systems such as fire sprinklers, standpipes, and foam systems. Fire pumps are also a critical component integrated into fire trucks and fire boats, and serve a similar purpose boosting water supplies for firefighting hose operations.
In an internal combustion engine, a head gasket provides the seal between the engine block and cylinder head(s). Its purpose is to seal the combustion gases within the cylinders and to avoid coolant or engine oil leaking into the cylinders. [1] Leaks in the head gasket can cause poor engine running and/or overheating.
Marinejegerkommandoen (MJK) (English: Naval Special Operations Command) is the maritime/naval special warfare unit of the Norwegian Armed Forces [2] and was established in 1953.
Nathaniel Brown Palmer (August 8, 1799 – June 21, 1877) was an American seal hunter, explorer, sailing captain, ship designer, and a whale hunter.He gave his name to Palmer Land, Antarctica, which he explored in 1820 on his sloop Hero.
For the grommet iron, the pivoting head and the shaft of this harpoon were held parallel by means of a grommet banded around them. The grommet slid off when the iron penetrated the whale (or fish), allowing the head to toggle open as the barb caught in the tissue. Lewis Temple's harpoon represented the finalization of European toggle harpoon ...