9905-00-990-9038 PLATE,IDENTIFICATION Index 4820-00-990-9045 VALVE,GATE

National Stock Number:
4820-00-990-9043

Federal Supply Class:
4820

National Item Identification Number:
009909043

Description:
VALVE,PRESSURE EQUALIZING,GASEOU

Detail:
A VALVE CONSISTING OF A SINGLE DEADWEIGHT LOADED DISK, OR TWO DEADWEIGHT LOADED DISKS EACH WITH A SEPERATE SEAT. IT IS SPECIFICALLY DESIGNED FOR THE RELIEF OF SMALL PRESSURE AND VACUUM CONDITIONS WITHIN A TANK OR OTHER CONTAINER TO OR FROM THE ATMOSPHERE. THE CENTER OF A SINGLE DEADWEIGHT LOADED DISK MAY CONTAIN A SPRING LOADED DISK FORMING AN ADDITIONAL SEAT OR APERTURE. IT MAY BE SPRING LOADED AND/OR EQUIPPED WITH A MANUAL UNLOADER ON EITHER THE PRESSURE OR VACUUM SIDE. EXCLUDE VALVE, VACUUM BREAKING.


Manufacturer Information:
1021519418876U S ARMY AVIATION AND MISSILE COMMAND
HV19415939STRATOTECH LLC


Techincal Specification:
BODY STYLESINGLE CONNECTION STRAIGHT THRU
END CONNECTION QUANTITY1
FIRST END CONNECTION TYPETHREADED EXTERNAL TUBE
FIRST END STYLE DESIGNATOREXTERNAL SEAT FOR GASKET SEAL
FIRST END THREAD DIRECTIONRIGHT-HAND
FIRST END THREAD CLASS2A
FIRST END OUTSIDE DIAMETER TUBE ACCOMMODATED0.875 INCHES NOMINAL
FIRST END SEAT ANGLE IN DEG37.5
FLOW CONTROL DEVICEDISK, PLUG TYPE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/4, ALLOY 2024, T3 FED SPEC SINGLE MATERIAL RESPONSE SEAT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-268, T3 FED SPEC SINGLE MATERIAL RESPONSE BODY
MATERIALALUMINUM ALLOY 2024 BODY
MATERIALALUMINUM ALLOY 2024 SEAT
MEDIA FOR WHICH DESIGNEDSTEAM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625, TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625, TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE
SURFACE TREATMENTANODIZE OUTSIDE
VALVE RELIEF DESIGN TYPEPRESSURE
VALVE VENTING DESIGN TYPEATMOSPHERIC


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