I
=,”,
15 December 1987
SUPERSEDING
I
NIL-V- 1189C(SHIPS)
25 August 1958
(See 6.8)
MILITARY SPECIFICATION
VALVE , GATE, 8RONZE
This specification is approved for use within the Naval Sea Systems Command,
Department of the Navy, and is available for use by al 1 Departments and
Agencies of the Department of Defense.
1.
SCOPE
1.1 =. This specification describes
oil , gas, or steam services on shipboard.
gate valves for use in water,
1.2 Classification. Gate valves shall be of the following types and
classes (see 6.2.1):
Type I
- Rising stem, outside screw and yoke.
,
I
class 1 -
Class 2 -
class 3 -
class 4 -
(See 6.6)
For working pressures not greater than 250 pounds
square inch (lb/in=) , 2-1/2 to 12 inches nominal
pipe size (rips)(water, oil, gas or steam)
For working pressures 251 to 400 lb/in2 , 2-1/2 to
inches nps (water, oil, gas , or steam)
For working pressures not greater than 50 lb/inz ,
per
12
14
to 46 inches nps (seawater) .
Type II - Non-rising stem, for working pressures not greater than 50
lbfin’ , 14 to 46 inches nps (seawater)
Beneficial comments (recommendations , additions, deletions) and any pertinent
data which may be of use in improving this document should be addressed to:
Commander, Neval Sea Systems Command,
SEA 5523, Department of the Navy,
Washington, DC 20362-5101 by using the self-addressed Standardizat ion Document
Improvement Proposal (DD Form 1426) appearing at the end of this document
or by letter.
AMSC N/A
FSC 4820
DISTRIBUTION STATEMENT A Approved for public release; distribution unlimited
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