Model: 521879

Safety Relief Valve

Properties:

Thread Direction
Right-hand 1st end
Flow Control Device
Poppet
Bonnet Type
Inside spring
Bonnet Attachment Method
Threaded
Disk Loading Method
Spring
Valve Discharge Flow Rate
42.0 cubic feet per minute
Maximum Operating Temp
60.0 degrees fahrenheit single response
Connection Style
G46b plain (pipe) 1st end
Connection Style
Plain (pipe) 1st end
Valve Operation Method
Automatic or manual
Connection Type
Threaded external pipe 1st end
Thread Size
0.250 inches 1st end
Opening Pressure Setting
70.0 pounds per square inch
Material
Copper alloy
Media For Which Designed
Air single response
Style Designator
Angle
Thread Series Designator
Npt 1st end
NSN
4820-00-287-6031
Part Number
521879
Description
Valve,safety Relief
CAGE
82722

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 521879 NSN 4820-00-287-6031

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:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
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:
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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