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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
ADST The means by which the bonnet is attached to the item.
ADSR Indicates the type of housing on the item that accommodates the stem packing or spring.
AHNC The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.
AWLS Indicates the type of connection/s/.
ADSU The means of closing the item when inlet pressure decreases.
ADQU The part that controls the flow through the item.
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.
AEHZ The maximum temperature at which the item is rated to operate for an extended period of time.
CQGM The maximum pressure at which the item is rated for operation.
MEDA The type of media for which the item is designed.
MEDA The type of media for which the item is designed.
AAAR A measurement of the pipe size the item will accommodate.
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.
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.
STYL The style designation indicating the configuration that most nearly corresponds to the appearance of the item.
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.
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.
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.
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.
AQLR The means used to control the operation of the valve.

D559A3M2 Safety Relief Valve

Mfr. Cage 91816

Specification

aluminum alloy 2024 body Thread Size: 0-3/8"

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

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