4820-01-215-3246 SEAT,VALVE Index 4320-01-215-3249 PUMP UNIT,CENTRIFUGAL

National Stock Number:
4820-01-215-3248

Federal Supply Class:
4820

National Item Identification Number:
012153248

Description:
SEAT,VALVE

Detail:
A replaceable item designed to provide a circular stationary seating surface for a mating, moveable item such as a valve disk or the like. The body may have a flange of various shapes. For diesel and gasoline reciprocating engines, see INSERT, ENGINE VALVE SEAT.


Manufacturer Information:
30147 PIECE 314959CRANE CO DIV VALVE DIV
9000-212996169ELECTRIC BOAT CORPORATION
9000-2129 PIECE 396169ELECTRIC BOAT CORPORATION


Techincal Specification:
BODY INSIDE DIAMETER2.625 INCHES MINIMUM AND 2.630 INCHES MAXIMUM
FLANGE DIAMETER3.875 INCHES NOMINAL
FLANGE SEAT TO DISK END HEIGHT0.688 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B164 ALLOY R-405 ASSN STD SINGLE MATERIAL RESPONSE SEAT
MATERIALNICKEL ALLOY B OVERALL
NOMINAL THREAD SIZE3.459 INCHES SINGLE THREADED PORTION
SPECIAL FEATURES4 SLOTS 0.750 IN. WIDE EQUALLY SPACED
SEATING SURFACE SHAPEFLAT
THREAD LENGTH0.656 INCHES NOMINAL SINGLE THREADED PORTION
THREAD QUANTITY PER INCH11-1/2 SINGLE THREADED PORTION
THREAD SERIES DESIGNATORUNS SINGLE THREADED PORTION
UNDER FLANGE HEIGHT0.812 INCHES NOMINAL
STYLE DESIGNATORTHREADED FLANGED


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