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
UNDER FLANGE HEIGHT0.812 INCHES NOMINAL
STYLE DESIGNATORTHREADED FLANGED
THREAD LENGTH0.656 INCHES NOMINAL SINGLE THREADED PORTION
THREAD SERIES DESIGNATORUNS SINGLE THREADED PORTION
THREAD QUANTITY PER INCH11-1/2 SINGLE THREADED PORTION


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