Marine Auxiliary Machinery by David W. Smith, J. Crawford and P. S. Moore (Auth.)

By David W. Smith, J. Crawford and P. S. Moore (Auth.)

The 7th variation of this vintage marine textbook is now on hand for the 1st time in paperback. This hugely revered publication instructs either scholars and sea-going engineers within the operation, care and upkeep of the auxiliary equipment and equipment on board send and is vital examining for marine engineers getting ready for British certificate of Competency examinations, US Licenses and comparable skills elsewhere.

Designed for ease of use, the special remedy and functional orientation of the subject material is gifted in a truly obtainable demeanour. The inclusion of feedback for extra analyzing on the finish of every bankruptcy is of specific use to scholars and all these drawn to any comparable titles. along this, there's additionally enough theoretical history to permit the reader to totally comprehend the rules concerned. those a number of positive aspects let the publication to additionally function an invaluable reference paintings for engineers within the shipbuilding and kit production industries, in addition to all sea-going engineers

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Leakage along the valve spindle is prevented by a stuffing box, packed with a suitable PIPES AND FITTINGS 3 GUIDES CAST INTEGRAL COVER 29 STUDS COVER NUTS COVER GASKET BODY DISC STELLITE Figure 2. ) material and a gland. g. in a bilge suction or on the side of a pressure vessel the valve is referred to as an angle valve. The flow is from below the valve seat, so that the gland is always on the low pressure side. The type of valve having the disc unattached to the spindle is known as screw-down non-return (SDNR).

Hinge shaft 7. Door 4. 12 2-valve change-over chest for oil and ballast suctions as arranged when filling or discharging ballast for either dry cargo or water ballast. In both cases the suction branches will have to be led to more than one pumping system. In the case of the former it may be the oil main and ballast main; in the case of the latter it will be the ballast main and the bilge main. To prevent accidents occurring, special valve chests are used in such cases in which interchangeable blanks and connecting passages are incorporated.

Steel in contact with copper, may corrode rapidly in sea water or even in condensate. The action is galvanic and sacrificial anodes give protection when attached in a manner giving good electrical bonding. Examples are soft iron plates in condenser water-boxes and zinc plates around the propeller aperture, adjacent to high-tensile brass propellers. Basically, brass is an alloy of copper and zinc and bronze an alloy of copper and tin. In both cases there may be additions of other metals and there is some confusion of nomenclature; some high-tensile brasses are called 'bronze' and the practice has prevailed for so long as to be accepted.

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