The Fleet Type Submarine - Submarine Trim and Drain Systems

HNSA Crest with photos of visitors at the ships.

	The Fleet Type Submarine Online Submarine Trim and Drain Systems

Submarine Trim and Drain Systems manual cover

Folks,

Submarine Trim and Drain Systems, Navpers 16166, is one of a series of submarine training manuals that was completed just after WW II. The series describes the peak of WW II US submarine technology.

In this online version of the manual we have attempted to keep the flavor of the original layout while taking advantage of the Web's universal accessibility. Different browsers and fonts will cause the text to move, but the text will remain roughly where it is in the original manual. In addition to errors we have attempted to preserve from the original (for example, it was H.L. Hunley, not CS Huntley), this text was captured by optical character recognition. This process creates errors that are compounded while encoding for the Web. Please report any typos, or particularly annoying layout issues with the HNSA Feedback Form for correction.

Our thanks to Shelly Shelstad ( http://www.history-on-cdrom.com) for permitting us to use images he has scanned, particularly the oversized images that were meticulously pieced together. History on CD ROM sells a very nice CD version of this manual in PDF format for easy access off the web and for a printing. Thanks also to IKON Office Solutions (http://www.ikon.com) for scanning services.

Richard Pekelney
Webmaster

	Search hnsa.org

NavPers 16166

Produced for ComSubLant by Standards and Curriculum Division Training, Bureau of Naval Personnel. Submarine Trim and Drain Systems

July 1945

NRB-48151-7 May 45-6M.

~~RESTRICTED~~

This is one of a series of Submarine Training Manuals. The series includes:

1.	The Fleet Type Submarine	NavPers 16160
2.	Submarine Main Propulsion Diesels	NavPers 16161
3.	Submarine Electrical Installations	NavPers 16162
4.	Submarine Refrigerating and Air-Conditioning Systems	NavPers 16163
5.	Submarine Distilling Systems	Navpers 16163A
6.	Submarine Air Systems	NavPers 16164
7.	Submarine Periscope Manual	NavPers 16165
8.	Submarine Trim and Drain Systems	NavPers 16166
9.	Submarine Sonar Operator's Manual	NavPers 16167
10.	Submarine Underwater Log Systems	NavPers 16168
11.	Submarine Hydraulic Systems	NavPers 16169
12.	Torpedo Tubes, 21-Inch submerged, Mks 32 to 39	O.P. 1085

PREFACE

The Submarine School, Submarine Base, New London, Connecticut and other activities of Submarines, Atlantic Fleet, have collaborated in the preparation of this manual. It is designed for use in both instruction and operations.

The text is prepared in two parts: the first three chapters cover the principles of operation and description of the trim and drain systems; detailed and specific operational instructions for each system are presented in Chapters 4 and 5. Free use has been made of sketches and flow diagrams in order to best serve the forces afloat as well as the students of the Submarine School.

It is recognized that equipment design is subject to change as new requirements are taken into account, and as recommendations from the forces afloat are acted upon. Consequently, the descriptions and discussions included must be considered as generally typical rather than final and specific in all details.

Rear Admril Styer's signature
C. W. STYER,
Rear Admiral, U. S. Navy,
Commander Submarines, Atlantic Fleet.

iii

CONTENTS

CHAPTER 1.	INTRODUCTION
	A. Basic Principles	1
	B. Trim System	1
	C. Drain System	2
CHAPTER 2.	THE TRIM SYSTEM
	A. Functions	3
	B. Trim Pump	4
	C. Manifolds	9
	D. Valves	14
CHAPTER 3.	THE DRAIN SYSTEM
	A. Functions	20
	B. Drain Pump	22
	C. Valves and Fittings	25
CHAPTER 4.	TRIM OPERATIONS
	A. Pump from Forward Trim Tank to Sea with Trim Pump	32
	B. Pump from After Trim Tank to Forward Trim Tank with Trim Pump	33
	C. Pump from Forward WRT Tank to Sea with Trim Pump	34
	D. Pump from Auxiliary Ballast Tank No. 1 to Forward Trim Tank with Trim Pump	35
	E. Pump from Safety Tank to Sea with Trim Pump	36
	F. Pump from Negative Tank to Sea with Trim Pump	37
	G. Pump from Negative Tank to Auxiliary Ballast Tank No. 2 with Trim Pump	38
	H. Pump from Sea to Hose Connection in Forward Engine Room with Drain Pump	39
	I. Pump from No. 1 to No. 2 Auxiliary Ballast Tank with Trim Pump	40
CHAPTER 5.	DRAIN OPERATIONS
	A. Pump from Forward Torpedo Room Bilges to Expansion Tank with Drain Pump	41
	B. Pump from Pump Room Bilges to Sea with Drain Pump	42
	C. Pump from Forward Torpedo Room Bilges to Sea with Drain Pump	43
	D. Pump Water from Collecting Tank to Expansion Tank with Drain Pump	44
	E. Pump Water from Collecting Tank to Expansion Tank with Trim Pump	45
	F. Pump from Poppet Valve Drain Tank to Sea with Drain Pump	46

iv

ILLUSTRATIONS

2-1.	Trim pump	5
2-2	Trim pump controls	6
2-3	Priming pump	8
2-4	Trim manifold	10
2-5	Forward WRT and trim tank manifold	12
2-6	Torpedo tube drain manifold	13
2-7	Trim pump sea stop valve	15
2-8	Torpedo tube drain stop valve to WRT tank	16
2-9	Magazine flood valve and testing casting	17
2-10	Trim line hose connection	18
3-1	Drain pump	21
3-2	Drain pump controls	23
3-3	Drain line stop valve	24
3-4	Drain pump overboard discharge valve	26
3-5	Bilge strainer	27
3-6	Macomb strainer	28
3-7	Drain line sight glass	29
3-8	Pitometer log well suction line and sump	30
3-9	Trim and drain systems	31
4-1	Pump from the forward trim tank to sea with the trim Pump	32
4-2	Pump from the after trim tank to the forward trim tank with the trim pump	33
4-3	Pump from forward WRT tank to sea with the trim Pump	34
4-4	Pump from auxiliary ballast tank No. 1 to the forward trim tank with the trim pump	35
4-5	Pump from the safety tank to sea with the trim Pump	36
4-6	Pump from the negative tank to sea with the trim Pump	37
4-7	Pump from the negative tank to auxiliary ballast tank No. 2 with the trim pump	38
4-8	Pump from sea to hose connection in forward engine room with the drain pump	39
4-9	Pump from No. 1 to No. 2 auxiliary ballast tank with the trim pump	40
5-1	Pump from forward torpedo room bilges to the expansion tank with the drain pump	41
5-2	Pump from the pump room bilges to sea with the drain pump	42
5-3	Pump from the forward torpedo room bilges to sea with the drain pump	43
5-4	Pump water from the collecting tank to the expansion tank with the drain pump	44
5-5	Pump water from the collecting tank to the expansion tank with the trim pump	45
5-6	Pump from the poppet valve drain tank to sea with the drain pump	46


v

Fleetsub Home Page

Next chapter

The Fleet Type Submarine OnlineSubmarine Trim and Drain Systems

The Fleet Type Submarine Online
Submarine Trim and Drain Systems