4820-00-821-8998 VALVE,GATE Index 1730-00-821-9014 SLING,AIRCRAFT MAINTENANCE

National Stock Number:
4820-00-821-9001

Federal Supply Class:
4820

National Item Identification Number:
008219001

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:
166438056ASHCROFT INC


Techincal Specification:
CONNECTION TYPETHREADED INTERNAL PIPE 1ST END
CONNECTION STYLEPLAIN,OPTIONAL END(PIPE) 1ST END
DISK LOADING METHODSPRING
FEATURES PROVIDEDPRESSURE TIGHT OUTLET SIDE
FLOW CONTROL DEVICEPOPPET
MATERIALCOPPER ALLOY BODY
MATERIALCOPPER ALLOY SEAT
MATERIALCOPPER ALLOY STEM
MAXIMUM OPERATING TEMP450.0 FAHRENHEIT 1ST RESPONSE
MAXIMUM OPERATING TEMP450.0 FAHRENHEIT 2ND RESPONSE
MAXIMUM OPERATING PRESSURE275.0 POUNDS PER SQUARE INCH 1ST RESPONSE
MAXIMUM OPERATING PRESSURE275.0 POUNDS PER SQUARE INCH 2ND RESPONSE
MEDIA FOR WHICH DESIGNEDAIR 1ST RESPONSE
MEDIA FOR WHICH DESIGNEDGAS, INERT 2ND RESPONSE
NOMINAL PIPE SIZE ACCOMMODATED0.250 INCHES 1ST END
NOMINAL THREAD SIZE0.250 INCHES 1ST END
OPENING PRESSURE SETTING30.0 POUNDS PER SQUARE INCH
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSAS DIFFERENTIATED BY VALVE SIZE AND SET PRESSURE
STYLE DESIGNATORSTRAIGHT THRU
THREAD DIRECTIONRIGHT-HAND 1ST END
THREAD SERIES DESIGNATORNPT 1ST END
THREAD QUANTITY PER INCH18 1ST END
VALVE DISCHARGE FLOW RATE33.0 CUBIC FEET PER MINUTE
VALVE OPERATION METHODAUTOMATIC


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