INCH-POUND
MIL-PRF-18953C(SH)
14 February 2005
SUPERSEDING
MIL-F-18953B(SH)
22 October 1990
PERFORMANCE SPECIFICATION
FANS, VANEAXIAL AND TUBEAXIAL,
VENTILATION AND AIR CONDITIONING,
NAVAL SHIPBOARD
This specification is approved for use by the Department of the Navy and is available for use by all
Departments and Agencies of the Department of Defense.
1. SCOPE
1.1 Scope
. This specification covers fixed vaneaxial and tubeaxial fans for Naval shipboard use in ventilation
and air conditioning systems.
1.2 Classification. Fans are of the following types, sizes, current, voltage and phase, enclosures, maximum
ambient temperature, structure, thermal protection, and quiet bearings as specified (see 6.2):
1.2.1 Types
.
Types PIN Code
A – Vaneaxial, fixed, Navy Standard (HI Shock) AA
L – Tubeaxial, fixed, Navy Standard (HI Shock) LL
X-A – Vaneaxial, fixed, Navy Standard (Non-
Shock, commercial marine motor)
XA
X-L – Tubeaxial, fixed, Navy Standard (Non-
Shock, commercial marine motor)
XL
Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Sea Systems
Command, ATTN: SEA 05Q, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or
emailed to commandstandards@navsea.navy.mil
, with the subject line “Document Comment”. Since contact
information can change, you may want to verify the currency of this address information using the ASSIST Online
database at http://assist.daps.dla.mil
.
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