4820-00-987-7452 SEAT,VALVE Index 2825-00-987-7454 SEAT,VALVE

National Stock Number:
4820-00-987-7453

Federal Supply Class:
4820

National Item Identification Number:
009877453

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:
101B354AA203502GENERAL ELECTRIC CO NAVAL AND DRIVE TURBINE SYSTEMS DEPT
101B354AA224446GENERAL ELECTRIC COMPANY
PL501E458AEPC424446GENERAL ELECTRIC COMPANY


Techincal Specification:
BODY OUTSIDE DIAMETER1.999 INCHES MINIMUM AND 2.000 INCHES MAXIMUM
BODY STEPPED INSIDE DIAMETER0.500 INCHES NOMINAL FIRST STEP
BODY STEPPED INSIDE DIAMETER0.645 INCHES NOMINAL SECOND STEP
BODY STEPPED INSIDE DIAMETER1.500 INCHES NOMINAL THIRD STEP
FLANGE DIAMETER2.5005 INCHES MINIMUM AND 2.5010 INCHES MAXIMUM
FLANGE SEAT TO DISK END HEIGHT0.498 INCHES MINIMUM AND 0.502 INCHES MAXIMUM
FSC APPLICATION DATATURBINE,STEAM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-853,CL 3,TY E MIL SPEC SINGLE MATERIAL RESPONSE BODY
MATERIAL DOCUMENT AND CLASSIFICATIONSTELLITE B21B23 MFR REF SINGLE MATERIAL RESPONSE SEAT
MATERIALSTEEL BODY
MATERIALSTEEL SEAT
SEAT RADIUS0.147 INCHES MINIMUM AND 0.153 INCHES MAXIMUM
SEATING SURFACE SHAPERADIAL
STYLE DESIGNATORPLAIN FLANGED
UNDER FLANGE HEIGHT1.000 INCHES NOMINAL


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