Model: D520A-4D-130

Safety Relief Valve

Special Features:

Deflector cap

Properties:

Thread Class
3a all ends
Thread Direction
Right-hand all ends
Flow Control Device
Poppet
Bonnet Type
Inside spring
Bonnet Attachment Method
Integral
Disk Loading Method
Spring
Maximum Operating Temp
-100.0 degrees fahrenheit 1st response
Maximum Operating Temp
400.0 degrees fahrenheit 2nd response
Connection Style
G46a plain (tube) all ends
Valve Operation Method
Automatic
Connection Type
Threaded external tube all ends
Thready Qty Per Inch (tpi)
20 all ends
Maximum Operating Pressure
200.0 pounds per square inch single response
Thread Size
0.438 inches all ends
Opening Pressure Setting
130.0 pounds per square inch
Material
Aluminum alloy 2024 body
Material
Silicon seat
Material Specification
Qq-a-225/6 federal specification single material response body
Media For Which Designed
Air 1st response
Media For Which Designed
Carbon dioxide 2nd response
Media For Which Designed
Helium 3rd response
Media For Which Designed
Hydrogen 4th response
Media For Which Designed
Nitrogen, gaseous 5th response
Surface Treatment
Anodize
Surface Treatment Specification
Mil-a-8625a military specification single treatment response
Thread Series Designator
Unjf all ends
Furnished Items And Quantity
1 deflector cap
NSN
4820-01-189-8525
Part Number
D520A-4D-130
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 D520A-4D-130 NSN 4820-01-189-8525

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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
127220
UFC:
64490
LTL:
77.5
LCL:
--
WCC:
671
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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