STANDARD LUBRICATING OiL SYSTEM FOR GEARED TURBINES. 251 



UNITED STATES SHIPPING BOARD, EMERGENCY FLEET CORPORATION, 



PHILADELPHIA, PA. 



DOCUMENT A. 



Technical Order No. 75 as Amended, 7/1 5/19. 



Detail Specification No. K-27S T. 3,000. 



Lubricating Oil System for Geared Turbine Units up to and including 3,000 

 horse-power. 



A. General Description. — The system generally shall consist of a drain or 

 sump tank ; a duplex lubricating oil pump, and an auxiliary pump of the same size ; 

 two oil coolers ; two gravity tanks, either of which may be used as a settling tank ; 

 one twin oil discharge strainer; an oil filter or separator; a cooling water-circula- 

 ting pump; one reserve oil tank; piping and connections; and shall conform to these 

 specifications and to Drawing No. E-i 1000-10. (Plate 108.) 



1. The oil will be drawn from the drain or sump tank by either main or auxili- 

 ary oil pump, and discharged through a twin oil strainer to either or both oil cool- 

 ers, and thence to gravity tanks. From these tanks the oil will discharge through 

 an internal pipe (extending 8 inches above the bottom of the gravity tank) to a 

 line leading to all bearings and gears, thence drained to sump tank. 



2. A I ^ -inch drain line shall be led from the lowest point of the gravity and 

 reserve tanks through an oil filter or separator to the drain tank, so that oil may be 

 filtered continuously or at stated periods. 



3. An overflow line shall run from the side, and as near the top as possible, of 

 the gravity tanks to the drain tank. This gives the air a good chance to be re- 

 leased from the oil through the vent pipes. 



4. A connection on oil discharge line will allow the oil to be discharged direct 

 to bilge, in the event of oil becoming emulsified. Control of this line shall be by 

 means of suitable cock with name plate clearly marked as follows: — "For emer- 

 gency use only to discharge badly emulsified oil to bilge. Turbine to be stopped 

 before using." 



5. Piping shall be arranged to permit of by-passing coolers so that oil may be 

 discharged directly from pump to gravity tank. This has been found necessary 

 when using heavy oils with cooling water of low temperature. 



6. Piping shall be arranged so as to permit either gravity tank being used al- 

 ternately as a settling tank, in which oil shall be allowed to settle and then be 

 drained to filter or separator. Under normal operating conditions either gravity 

 tank shall constantly overflow to drain tank. 



7. Piping shall be arranged to permit of oil being delivered from reserve oil 

 tank to the filter or separator, and to drain tank through overflow line from gravity 

 tanks. 



8. Pressure gauges shall be provided in accessible and visible positions in dis- 

 charge lines from both oil and water pumps and in oil supply manifolds to turbine 



