PRINCIPLES OF NAVAL ENGINEERING 



STAINLESS STEEL 



BELLOWS 



INTERNAL SLEEVE 



COMPRESSION LIMIT 

 LIMIT STOP 



EXTERNAL DIRT GUARD 



FLANGE 



38.127X 

 Figure 14-2.— Bellows-type expansion 

 joint. 



11.312 

 Figure 14-3.— Flareless fluid connection 

 (bite-type fitting). 



the bellows cools and contracts, thereby opening 

 the valve and allowing the condensate to drain. 



IMPULSE STEAM TRAPS. -Impulse steam 

 traps of the type shown in figure 14-7 are used 

 in some steam drain collecting systems aboard 

 ship. Steam and condensate pass through a 

 strainer before entering the trap. A circular 



11.325D 

 Figure 14-4.— Ball float steam trap. 



TEST OUTLET 



VALVE SEAT 

 VALVE 

 VALVE BODY 



VALVE ROD 

 COVER 

 BODY. 



CAP GASKET 



OUTLET 

 MAIN 

 /nEASKET 



BUCKET 



!. 

 (■■ 

 [, 



' BUCKET 

 HINGE ROD 



VALVE HINGE 



BUCKET' 



11.325X 

 Figure 14-5.— Bucket-type steam trap. 



baffle keeps the entering steam and condensate 

 from impinging on the cylinder or on the disk. 

 The impulse type of steam trap depends for 

 its operation on the fact that hot water under 

 pressure tends to flash into steam when the 

 pressure is reduced. In order to understand how 



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