Model: 83

Safety Relief Valve

Properties:

Pipe Size Accommodated
3.000 inches 1st end
Thread Direction
Right-hand 1st end
Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Threaded
Disk Loading Method
Spring
Bolt Hole Quantity
4 2nd end
Connection Style
G9 plain, optional en (pipe) 1st end
Valve Operation Method
Automatic or manual
Flange Shape
Round with holes 2nd end
Connection Type
Flange 2nd end
Connection Type
Threaded internal pipe 1st end
Features Provided
Valve stem lock shield and pressure tight outlet side
Valve Size
2.000 inches
Thread Size
3.000 inches 1st end
Opening Pressure Setting
12.0 pounds per square inch
Outside Diameter
6.000 inches 2nd end
Thickness
0.500 inches 2nd end
First Connection Face To Centerline Distance
4.500 inches
Bolt Hole Diameter
0.750 inches 2nd end
Second Connection Face To Centerline Distance
2.875 inches
Bolt Circle Diameter
4.750 inches 2nd end
Flange Face Design
Plain 2nd end
Material
Copper alloy flow control device
Material
Copper alloy seat
Material
Copper alloy body
Material
Steel stem
Thread Series Designator
Npt 1st end
Reference Number Differentiating Characteristics
As differentiated by relief pressure rating, and size and type of end connections
NSN
4820-00-950-5975
Part Number
83
Description
Valve,safety Relief
CAGE
01343

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 83 NSN 4820-00-950-5975

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

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:
Trailers/Vehicles

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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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