4820-00-880-0420 DISK,VALVE Index 4820-00-880-0422 VALVE,CHECK

National Stock Number:
4820-00-880-0421

Federal Supply Class:
4820

National Item Identification Number:
008800421

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:
5-664-886768TELEDYNE INDUSTRIES INC TELEDYNE FLUID SYSTEMS REPUBLIC BUSINESS UNIT
576R360H0297942NORTHROP GRUMMAN SYSTEMS CORPORATION


Techincal Specification:
STYLE DESIGNATORANGLE
VALVE OPERATION METHODAUTOMATIC
MATERIALALUMINUM ALLOY 2014 AND
ALUMINUM ALLOY OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-200/2,ALLOY2014,T4 FED SPEC 1ST MATERIAL RESPONSE AND
QQ-A-225/4,ALLOY 2014,T4 FED SPEC 2ND MATERIAL RESPONSE OR
QQ-A-367,COMP 2014,T4 FED SPEC 3RD MATERIAL RESPONSE OVERALL
SURFACE TREATMENTANODIZE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY 1 MIL SPEC SINGLE TREATMENT RESPONSE
FLOW CONTROL DEVICEPOPPET
MAXIMUM OPERATING TEMP165.0 DEG FAHRENHEIT SINGLE RESPONSE
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
CONNECTION STYLEFLARED (TUBE) ALL ENDS
SEAT ANGLE37.0 DEGREES ALL ENDS
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS
THREAD SERIES DESIGNATORUNF ALL ENDS
NOMINAL THREAD SIZE0.437 INCHES ALL ENDS
THREAD QUANTITY PER INCH20 ALL ENDS
THREAD CLASS3A ALL ENDS
THREAD DIRECTIONRIGHT-HAND ALL ENDS
DISK LOADING METHODSPRING
OPENING PRESSURE SETTING90.0 POUNDS PER SQUARE INCH
ADJUSTABLE PRESSURE RANGE40.0 TO 125.0 POUNDS PER SQUARE INCH
FEATURES PROVIDEDPRESSURE TIGHT OUTLET SIDE


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