. A manual of marine engineering: comprising the design, construction, and working of marine machinery. — Cock-burns Valve(Navy Type). Fig. 182. and worked the patent in this country, and Cockburns Yalve (fig. 184),designed and made by Messrs. Cockburn, of Glasgow. These consistessentially of an ordinary mushroom valve with a secondary outer rimof U section which overlaps the rim of the seat, so that there is a second SAFETY VALVE. 475 contracted orifice at the outer edge of this rim. As soon as the valveopens, the steam fills the outer rim, and the valve is then virtually oflarger area; the l
. A manual of marine engineering: comprising the design, construction, and working of marine machinery. — Cock-burns Valve(Navy Type). Fig. 182. and worked the patent in this country, and Cockburns Yalve (fig. 184),designed and made by Messrs. Cockburn, of Glasgow. These consistessentially of an ordinary mushroom valve with a secondary outer rimof U section which overlaps the rim of the seat, so that there is a second SAFETY VALVE. 475 contracted orifice at the outer edge of this rim. As soon as the valveopens, the steam fills the outer rim, and the valve is then virtually oflarger area; the load on it is so suddenly increased that the valve liftswide open immediately, and will continue to vibrate with the spring untilthe pressure falls so as to be insufiicient to open the valve when the lattertouches the seat in one of its vibrations. The second condition is bestfulfilled when the valve can be made to dance over its seat from the vibrationof the spring. The third condition can only be fulfilled by making everymovable part a very easy and, in most cases, a very slack Jit, and having.
Size: 1055px × 2369px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidmarineen00seatmanualofric
