2825-00-991-8656 VALVE,POPPET,STEAM Index 2825-00-991-8658 VALVE,POPPET,STEAM

National Stock Number:
4820-00-991-8657

Federal Supply Class:
4820

National Item Identification Number:
009918657

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:
H-204216712SIEMENS ENERGY, INC.
H2042PC2616712SIEMENS ENERGY, INC.
KJ62BA16712SIEMENS ENERGY, INC.


Techincal Specification:
BODY OUTSIDE DIAMETER3.989 INCHES MINIMUM AND 3.990 INCHES MAXIMUM
BODY STEPPED INSIDE DIAMETER1.750 NOMINAL INCHES FIRST STEP
BODY STEPPED INSIDE DIAMETER2.470 NOMINAL INCHES SECOND STEP
FLANGE DIAMETER4.965 INCHES MINIMUM AND 4.975 INCHES MAXIMUM
FLANGE SEAT TO DISK END HEIGHT0.749 NOMINAL MILS AND 0.751 NOMINAL CENTIMETERS
FSC APPLICATION DATATURBINE,STEAM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-861,CL 410 MIL SPEC SINGLE MATERIAL RESPONSE BODY
MATERIAL DOCUMENT AND CLASSIFICATIONSTELLITE 6 MFR REF SINGLE MATERIAL RESPONSE SEAT
MATERIALSTEEL BODY
MATERIALSTEEL SEAT
PROPRIETARY CHARACTERISTICSPACS
SEAL ACCOMMODATION TYPERECESSED
SEAT RADIUS0.660 INCHES NOMINAL
SEATING SURFACE SHAPERADIAL
STYLE DESIGNATORPLAIN FLANGED
UNDER FLANGE HEIGHT4.000 INCHES NOMINAL


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