4820-01-078-4788, VALVE,PRESSURE EQUALIZING,GASEOU

4820-01-078-4789 VALVE,PRESSURE EQUALIZING,GASEOU

National Stock Number:
4820-01-078-4788

Federal Supply Class:
4820

National Item Identification Number:
010784788

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:

1853332

03956

NORTHROP GRUMMAN SYSTEMS CORPORATION

Techincal Specification:

BODY MATERIAL	STEEL
FLOW CONTROL DEVICE	NEEDLE
MAXIMUM OPERATING PRESSURE	45.0 POUNDS PER SQUARE INCH
VALVE VENTING DESIGN TYPE	ATMOSPHERIC
BODY STYLE	STRAIGHT THRU
END CONNECTION QUANTITY	2
FIRST END CONNECTION TYPE	THREADED EXTERNAL TUBE
FIRST END STYLE DESIGNATOR	FLARED
FIRST END OUTSIDE DIAMETER TUBE ACCOMMODATED	0.500 INCHES NOMINAL
FIRST END THREAD PITCH DIAMETERS	0.5976 TO 0.5978 INCHES
FIRST END THREAD DIRECTION	RIGHT-HAND
FIRST END THREAD SERIES DESIGNATOR	UNEF
FIRST END NOMINAL THREAD SIZE	0.625 INCHES
FIRST END THREAD TOLERANCE CLASS	3A EXTERNAL
SECOND END RELATIONSHIP WITH FIRST END	NOT IDENTICAL
SECOND END CONNECTION TYPE	UNTHREADED INTERNAL HOSE
SECOND END STYLE DESIGNATOR	HOSE SOCKET
SECOND END INSIDE DIAMETER HOSE ACCOMMODATED	0.250 INCHES NOMINAL
SECOND END OUTSIDE DIAMETER HOSE ACCOMMODATED	0.250 INCHES MINIMUM AND
	0.437 INCHES MAXIMUM
MEDIA FOR WHICH DESIGNED	GAS
VALVE RELIEF DESIGN TYPE	PRESSURE AND
	VACUUM
THE MANUFACTURERS DATA
MANUFACTURERS CODE	03956
DESIGN CONTROL REFERENCE	1853332

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