10.07.2015 Views

UNDERWAY REPLENISHMENT NWP 4-01.4 - Historic Naval Ships ...

UNDERWAY REPLENISHMENT NWP 4-01.4 - Historic Naval Ships ...

UNDERWAY REPLENISHMENT NWP 4-01.4 - Historic Naval Ships ...

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<strong>NWP</strong> 4-<strong>01.4</strong>MACHINED GROOVEB END (SHOWN BELOW)FLANGE TO FEMALE SPLIT CLAMPA END (SHOWN BELOW)FUEL RISERSPLIT CLAMPHOSE COUPLINGHOSEDROP BOLTGASKETSLOTTEDFLANGEFLOATING RINGFLANGEA END - RECEIVING SHIPB END - DELIVERY SHIPFigure 3-12. Breakable-Spool, NATO Quick-Release Coupling3.7.4.5 Quick-Release Coupling, 2-1/2 Inch(63.5 mm). This coupling is used only when ships areunable to use the D-2 nozzle system.3.7.4.6 Type D-2 Nozzle and Receiver. The D-2nozzle (NAVSEA Drawing 571-6821693) shown inFigure 3-13 is the standard fuel coupling for all 2-1/2-inch (63.5 mm) alongside delivery rigs. The couplingis a quick-operating, dry-break device. Connectionrequires a 30° turn while pushing the two halves together.Once connected, the internal flow valve on thenozzle end is rotated to full open, which depresses thepoppet type of check valve in the receiving half. Whenthe valve is open, the nozzle cannot be disconnectedfrom the receiver (NAVSEA Drawing 571-6821656).To disconnect, the valve must first be closed; then thenozzle is rotated back 30° until free of the receiver.3-16 ORIGINAL

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