INCH-POUND
MIL-PRF-2940D
13 April 1999
SUPERSEDING
MIL-S-2940C
1 November 1994
PERFORMANCE SPECIFICATION
SNUBBERS, FLUID PRESSURE, INSTRUMENT PROTECTION
This specification is approved for use by all Departments and Agencies
of the Department of Defense.
1.
SCOPE
1.1 Scope. A snubber covered by this specification is a pressure
transmission device which restricts the rate of fluid flow to a pressure
sensing instrument and, as a result, the rate of pressure change.
1.2 Classification. Snubbers covered by this specification are
classified according to the following characteristics, as specified (see 6.2).
EXAMPLE:
M2940
-
1
-
L
-
A
-
P
-
G
Type
Class
Composition
End
Cleanliness
(see
(see
(see 1.2.3)
connection
(see 1.2.5)
1.2.1)
1.2.2)
(see 1.2.4)
1.2.1 Types. The type of service in which the snubber will be used
will be designated by one of the following numbers and should be selected
based on the expected fluid at the snubber location:
Type
Service
1
Oils, hydraulic fluid above 20 centistokes
(cSt). Oil above 225 Saybolt seconds universal
(SSU) at operating temperatures.
2
Fresh water, steam, gasoline, light oils below
20 cSt.
3
Gases.
4
Seawater.
Beneficial comments (recommendations, additions, deletions) and any pertinent
data which may be of use in improving this document should be addressed to:
Commander, SEA 03Q, Naval Sea Systems Command, 2531 Jefferson Davis Hwy,
Arlington, VA 22242-5160 by using the Standardization Document Improvement
Proposal (DD Form 1426) appearing at the end of this document or by letter.
AMSC N/A
FSC 6685
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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