Product Details | SAFETY RELIEF VALVE

4820-01-011-0644 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: 5120T2MP2000, 77674226, 77674-226, 4820-01-011-0644, 01-011-0644, 4820010110644, 010110644

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 12 OCT 1975 01-011-0644

Drawings & Photos | NSN 4820-01-011-0644


Cross Reference | NSN 4820-01-011-0644

Part Number Cage Code Manufacturer
5120T2MP2000 91816 CIRCOR AEROSPACE, INC. DBA CIRCLE SEAL CONTROLS
77674-226 86768 TELEDYNE INDUSTRIES INC TELEDYNE FLUID SYSTEMS REPUBLIC

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Technical Data | NSN 4820-01-011-0644

Characteristic Specifications
MATERIAL STEEL COMP 303 BODY STEEL COMP 303 FLOW CONTROL DEVICE STEEL COMP 303 SEAT
MATERIAL DOCUMENT AND CLASSIFICATION QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE BODY QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE SEAT
STYLE DESIGNATOR C4 STRAIGHT THRU
FLOW CONTROL DEVICE CONE
MAXIMUM OPERATING PRESSURE 2000.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP 450.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD AUTOMATIC
POWER DRIVE OPERATING PRESSURE 1530.0 POUNDS PER SQUARE INCH NOMINAL
CONNECTION TYPE THREADED EXTERNAL PIPE 1ST END
CONNECTION STYLE G46B PLAIN 1ST END
NOMINAL PIPE SIZE ACCOMMODATED 0.250 INCHES 1ST END
THREAD SERIES DESIGNATOR NPT 1ST END
NOMINAL THREAD SIZE 0.250 INCHES 1ST END
THREAD QUANTITY PER INCH 18 1ST END
THREAD DIRECTION RIGHT-HAND 1ST END
RENEWABLE SEAT RING TYPE PRESSED-IN
BONNET TYPE INSIDE SPRING
BONNET ATTACHMENT METHOD THREADED
DISK LOADING METHOD SPRING
OPENING PRESSURE SETTING 2000.0 POUNDS PER SQUARE INCH
ADJUSTABLE PRESSURE RANGE 1530.0 TO 2400.0 POUNDS PER SQUARE INCH
FEATURES PROVIDED BONNET PACKING AND PRESSURE TIGHT OUTLET SIDE
MANUFACTURERS CODE 91816
DESIGN CONTROL REFERENCE 5120T2MP2000

Restrictions/Controls & Freight Information | NSN 4820-01-011-0644

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
NMF Description 127220 PRESSURE REG/RED/RELIEF VALVES NOI
Less than car load rating P 77.5
Less than truck load rating P 77.5
Water commodity Code 594 unknown
Originating Activity Code ZG Germany
ZH
ZJ
Air Dimension Code A Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity V Vehicles, machinery, shop and warehouse equipment and supplies, including special tools and equipment, ground servicing and special purpose vehicles, marine equipment and supplies, repair and maintenance parts for the above.
Air Special Handling Z No special handling required.
Special Handling Code 9 unknonwn
HAZMAT
Type of Cargo Z No special type of cargo code applicable