Chapter 9-MACHINERY ARRANGEMENT AND PLANT LAYOUT 



MAIN FUEL OIL 

 VALVES (ONE TO 

 EACKBOILER ) 



SUPERHEATER 

 SIDE BUHNER 

 MANIFOLD 



RECIRCULATING - 

 VALVE 



TO OVERBOARD OR 



OIL SETTLING TANK 



^-03 



RECIRCULATING 

 LINE 



^^-^ ^ ^SATURATEO-SID 



RECIRCULATING/^^ BURNER MANIFO 

 VALVE i^ 



TO 

 OTHER 

 BOILER 



DUPLEX 

 STRAINER 



F HEATERS^ 



-I'-CKH, 



■*-CXH 



HEATER BYPASS VALVE 



REMOTE -OPERATED 

 QUICK -CLOSING VALVE 



F 



SERVICE 

 I -CHECK PUMP, 

 ?< VALVE 



TO FILLING AND DISCHARGE 

 DECK CONNECTION 



V 



9»— ixi — 



FUEL OIL SERVICE 

 TANK 



38.63 



Figure 9-21.— Fuel oil service system on ship with double furnace boilers 

 having straight-through-flow atomizers. 



Suction and discharge valves allow the pumps 

 to be lined up for the delivery of fuel oil. The 

 remote-operated quick- closing valve in the sup- 

 ply main on the discharge side of the fuel oil 

 service pump provides a means for rapidly 

 shutting off the fuel oil from a remote location. 

 The remote operating gear for this valve is 

 arranged so that the valve may be operated 



from two places; (1) from the fuel oil pump 

 itself, and (2) from the fireroom escape trunk 

 or from the deck above and near the access 

 to the space. Fuel oil meter and meter bypass 

 valves allow the fuel oil meter to be used or 

 to be bypassed, as the situation requires; the 

 fuel oil meter is bypassed when oil is being 

 recirculated. A fuel oil heater bypass valve 



223 



