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NSN: 4820-00-001-0037
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Cross Reference

These part numbers have the same form, fit, and function of d559a3m2
Item Number Cage
D559A3M2 91816

Characteristic Codes

D559A3M2 spec. code meanings
Code Translation
AAAR A measurement of the pipe size the item will accommodate.
AAJF The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.
ADQU The part that controls the flow through the item.
ADSR Indicates the type of housing on the item that accommodates the stem packing or spring.
ADST The means by which the bonnet is attached to the item.
ADSU The means of closing the item when inlet pressure decreases.
AEHZ The maximum temperature at which the item is rated to operate for an extended period of time.
AHNC The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.
AHNC The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.
AQLR The means used to control the operation of the valve.
AWLS Indicates the type of connection/s/.
CQGM The maximum pressure at which the item is rated for operation.
CQJX A designation that is used for the purpose of general identification of the thread.
CSDC The predetermined pressure at which the item is calibrated to open.
MATT The chemical compound or mechanical mixture properties of which the item is fabricated.
MATT The chemical compound or mechanical mixture properties of which the item is fabricated.
MDCL The specification, standard, or manufacturers reference, and the classification designation, such as class, condition, temper, and the like, that identifies the material.
MDCL The specification, standard, or manufacturers reference, and the classification designation, such as class, condition, temper, and the like, that identifies the material.
MEDA The type of media for which the item is designed.
MEDA The type of media for which the item is designed.
SFTT The metallic, nonmetallic, and/or chemical properties with which the item is plated, dipped, and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.
STDC The specification, standard, or manufacturers reference, and the classification designation, such as type, class, grade, and the like, that identifies the surface treatment material.
STYL The style designation indicating the configuration that most nearly corresponds to the appearance of the item.
STYL The style designation indicating the configuration that most nearly corresponds to the appearance of the item.
THSD A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.

D559A3M2

Description: Safety Relief Valve
Mfr. Cage 91816

Specification

Thread Size: 0-3/8", aluminum alloy 2024 flow control device and rubber butadiene-acrylonitrile class nbr flow control device

AAAR Nominal Pipe Size Accommodated
0.375 inches 1st end
AAJF Thread Direction
Right-hand 1st end
ADQU Flow Control Device
Poppet
ADSR Bonnet Type
Inside screw
ADST Bonnet Attachment Method
Threaded
ADSU Disk Loading Method
Spring
AEHZ Maximum Operating Temp
280.0 deg fahrenheit single response
AHNC Connection Style
G46b plain (pipe) 1st end
AHNC Connection Style
Plain (pipe) 1st end
AQLR Valve Operation Method
Automatic
AWLS Connection Type
Threaded external pipe 1st end
CQGM Maximum Operating Pressure
200.0 pounds per square inch single response
CQJX Nominal Thread Size
0.375 inches 1st end
CSDC Opening Pressure Setting
2.0 pounds per square inch
MATT Material
Aluminum alloy 2024 flow control device and rubber butadiene-acrylonitrile class nbr flow control device
MATT Material
Aluminum alloy 2024 body
MDCL Material Spec
Qq-a-225/6,alloy2024,t4 fed spec single material response body
MDCL Material Spec
Qq-a-225/6,alloy2024,t4 fed spec single material response seat
MEDA Media For Which Designed
Air 1st response
MEDA Media For Which Designed
Hydrogen 4th response
SFTT Surface Treatment
Anodize
STDC Surface Treatment Spec
Mil-a-8625,ty 1 mil spec single treatment response
STYL Style Designator
C5 straight thru w/baffle
STYL Style Designator
Straight thru w/baffle
THSD Thread Series Designator
Npt 1st end

Technical Definition

Valve, Safety Relief, also referenced with federal logistics item name code 05488 - 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.
National Stock Number (NSN) 4820-00-001-0037

Last Modified: 02/14/2017