Model: 524A-4D-20

Safety Relief Valve

Properties:

Thread Class
3a 1st end
Thread Direction
Right-hand 1st end
Flow Control Device
Poppet
Disk Loading Method
Spring
Valve Discharge Flow Rate
6.0 cubic feet per minute
Maximum Operating Temp
-100.0 degrees fahrenheit 1st response400.0 degrees fahrenheit 2nd response
Connection Style
G42 flared (tube) 1st end
Valve Operation Method
Automatic
Connection Type
Threaded external tube 1st end
Features Provided
Pressure tight outlet side
Maximum Operating Pressure
200.0 pounds per square inch single response
Thread Size
0.437 inches 1st end
Seat Angle
37.0 degrees 1st end
Opening Pressure Setting
20.0 pounds per square inch
Outside Diameter Tube Accommodated
0.250 inches 1st end
Material
Aluminum alloy 2024 flow control device
Material
Aluminum alloy 2024 body
Media For Which Designed
Air 1st response
Media For Which Designed
Oil, chlorinated transformer 2nd response
Media For Which Designed
Oxygen, gaseous 3rd response
Thread Series Designator
Unjf all ends
NSN
4820-00-820-7659
Part Number
524A-4D-20
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 524A-4D-20 NSN 4820-00-820-7659

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:
SX
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:
594
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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