Model: D559A-4D-45

Safety Relief Valve

Properties:

Thread Class
3a all ends
Thread Direction
Right-hand all ends
Flow Control Device
Poppet
Maximum Operating Temp
-40.0 degrees fahrenheit 1st response
Maximum Operating Temp
280.0 degrees fahrenheit 2nd response
Connection Style
G46a plain (tube) all ends
Valve Operation Method
Automatic
Connection Type
Threaded external tube all ends
Maximum Operating Pressure
200.0 pounds per square inch single response
Thread Size
0.438 inches all ends
Opening Pressure Setting
45.0 pounds per square inch
Material
Aluminum alloy body
Media For Which Designed
Air 1st response
Media For Which Designed
Alcohol, ethyl 2nd response
Media For Which Designed
Ammonia, gaseous 3rd response
Media For Which Designed
Fuel/oil, hydrocarbon 4th response
Media For Which Designed
Hydrogen 5th response
Style Designator
C6 straight thru
Thread Series Designator
Unjf all ends
Furnished Items And Quantity
1 deflector cap
NSN
4820-01-221-8854
Part Number
D559A-4D-45
Description
Valve,safety Relief
CAGE
91816

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 D559A-4D-45 NSN 4820-01-221-8854

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05488
FIIG:
A046B0
Concept No.:
1
App. Key:
AP
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
051080
UFC:
29300
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 8481400000
  • SITC: 74740
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

Freight Class: Safety or relief valves

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