3020-00-191-6880 GEAR,WORM Index 5910-00-191-6882 CAPACITOR,FIXED,MICA DIELECTRIC

National Stock Number:
4820-00-191-6881

Federal Supply Class:
4820

National Item Identification Number:
001916881

Description:
VALVE,SAFETY RELIEF

Detail:
A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes VALVE (1), RELIEF, PRESSURE AND TEMPERATURE.


Manufacturer Information:
C491-281755LOCKHEED MARTIN CORPORATION
P20-38391816CIRCOR AEROSPACE, INC.


Techincal Specification:
ADJUSTABLE PRESSURE RANGE+47.0 TO 53.0 POUNDS PER SQUARE INCH
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) 1ST END
CONNECTION TYPETHREADED EXTERNAL BOSS 1ST END
FEATURES PROVIDEDVALVE STEM LOCK SHIELD AND PRESSURE TIGHT OUTLET SIDE
FLOW CONTROL DEVICEDISK
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6,ALLOY2024 FED SPEC ALL MATERIAL RESPONSES OVERALL
MATERIALALUMINUM ALLOY 2024 OVERALL
MAXIMUM OPERATING PRESSURE60.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP450.0 FAHRENHEIT SINGLE RESPONSE
MEDIA FOR WHICH DESIGNEDAIR SINGLE RESPONSE
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED1.000 INCHES 1ST END
NOMINAL THREAD SIZE1.312 INCHES 1ST END
OPENING PRESSURE SETTING50.0 POUNDS PER SQUARE INCH
STYLE DESIGNATORSTRAIGHT THRU
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE
SURFACE TREATMENTANODIZE
THREAD CLASS3A 1ST END
THREAD DIRECTIONRIGHT-HAND 1ST END
THREAD QUANTITY PER INCH12 1ST END
THREAD SERIES DESIGNATORUN 1ST END
VALVE OPERATION METHODAUTOMATIC
VALVE DISCHARGE FLOW RATE200.0 CUBIC FEET PER MINUTE


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