Product Details | SAFETY RELIEF VALVE

4820-01-271-4797 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.

Part Alternates: 559B2M425, 8814650407, 4820-01-271-4797, 01-271-4797, 4820012714797, 012714797

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 26 JAN 1988 01-271-4797

Drawings & Photos | NSN 4820-01-271-4797


Demand History | NSN 4820-01-271-4797

Part Number Request Date QTY Origin
4820-01-271-4797 2010-11-01 5 us

Cross Reference | NSN 4820-01-271-4797

Part Number Cage Code Manufacturer
559B2M425 91816 CIRCOR AEROSPACE, INC. DBA CIRCLE SEAL CONTROLS
8814650407 F0228 TURBOMECA

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Technical Data | NSN 4820-01-271-4797

Characteristic Specifications
MATERIAL COPPER ALLOY OVERALL
STYLE DESIGNATOR C4 STRAIGHT THRU
FLOW CONTROL DEVICE SLIDE
MAXIMUM OPERATING PRESSURE 600.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP 250.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE THREADED EXTERNAL PIPE ALL ENDS
CONNECTION STYLE G46B PLAIN ALL ENDS
THREAD SERIES DESIGNATOR NPT ALL ENDS
NOMINAL THREAD SIZE 0.250 INCHES ALL ENDS
THREAD DIRECTION RIGHT-HAND ALL ENDS
DISK LOADING METHOD SPRING
OPENING PRESSURE SETTING 425.0 POUNDS PER SQUARE INCH

Restrictions/Controls & Freight Information | NSN 4820-01-271-4797

Category Code Description
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Precious Metals Indicator Code:UPrecious metal type is unknown
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Category Code Description
No Freight Information