MIL-V-2042XS~PS)
24 Ju]y ~gw
SUPERSEDING
MXL-V-2042C@H1=)
28
~OVSTI)ber 1966
(See 6. 6J
IKXLITARY SPECIFICATION
VALVES, REDUCING, WATER SERVICE, FOR
NAVAL SHIPBOARD USE
1. SCOPE
1.1 Scope .- This specification covers pressure reducing valves for use in water systems on Naval
sNps. These valves are hrmted to pressure settings of 200 pounds per square inch gage @aig) and below.
d
L. 2 ~assifjcation. - Valves shi311be of the foIloting types, as 5P@ctiIed (see fit ~;.
~pe 1 (Specld) -
Valve6 in which the spring chamber in combination with the body and bottom cap
forms a pressure containing envelope capable of withstanding the full proof pressure rating. These
valves shall be specified for special applications where it is necessary to contain the line media
in the event of a failure which subjects the spring chamber to full inlet pressure. The spring
chamber assembly need not be leakproof, however it shall be capable of containing line media at
proof pressure without structural failure and shall L]mit exlernal lsakage to a small weepage
past the adjusting screw threads and spri~ chamber )omt.
Type I valves may alsc~ mcc)rporate
a choke feature c)n thl- poppef to Iimil Capaci% in the evf’mt of diaphragm fatiure) where sPec~i -
cslly ordered.
Type U - Valves m which the sprin~;
ChMIA)ei mea w. AUJ.ii PAI [ Li L],. PI S,jur L c I.’ I.*wI:!ri:
envelope.
1.3 Pressure ratings. -
Valves shall have nommal pressure ratings of 150, 250, 400 and 700 psig
as spectfied (see 6. 2/.
2. APPLICABLE DOCUMENTS
2.1 The follownq CIOCurnencs of th!$issue in effect
cm date of invitation for bids or request for proposal,
form a part oi the speciftca~on to the extent spectiled herein.
SPECI.FICATIONS
FEDERAL
QQ-N-288 - NickeI - Copper Alloy and Nickel-Copper-Silicon Alloy Castings.
MILITARY
MSL-S-901 -
MIL-D-lM’W’2 -
MIL-F-1183 -
MIL-h9-1657ti -
MIL-F-20042 -
MIL-C-20159 -
MIL-B-23921 -
MIL-B-24059 -
MIL-F-24227 -
Shock Tests, H. L (High-impact), Shipboard Machinery, Equipment and
Systems, Requirements for.
Drawings, Engineering and Associated L~sts.
Fittings, ~be,
Cast Bronze, Silver Br~lW.
Met&L 6un Castmgb.
Flanges, Pipe,
Bronze (sfl~er ~r=~w)o
Oopper-Nickel Alloy (70-30 and 90-10) Castings.
Bronze, Nickel-Aluminum Castings for Seawater Service.
Bronze, Nickel Aluminum, Rod, FI at Products with Finished Edges,
Shapes and Forgings.
Fittings and Flanges, Cast Bronze, Silver-BraziW? S@table for Ultrasomc
Inspection.
FSC 4820
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