Model: 1478-3-4IN300PSI

Safety Relief Valve

Properties:

Pipe Size Accommodated
0.750 inches 1st end
Pipe Size Accommodated
0.750 inches 2nd end
Thread Direction
Right-hand 2nd end
Thread Direction
Right-hand 1st end
Bonnet Type
Inside spring
Disk Loading Method
Spring
Maximum Operating Temp
406.0 degrees fahrenheit 1st response
Maximum Operating Temp
406.0 degrees fahrenheit 2nd response
Connection Style
G46b plain (pipe) 2nd end
Connection Style
G9 plain, optional en (pipe) 1st end
Connection Type
Threaded external pipe 2nd end
Connection Type
Threaded internal pipe 1st end
Maximum Operating Pressure
300.0 pounds per square inch 1st response
Maximum Operating Pressure
300.0 pounds per square inch 2nd response
Material
Copper alloy seat
Material
Copper alloy stem
Material
Copper alloy body
NSN
4820-01-015-1297
Part Number
1478-3-4IN300PSI
Description
Valve,safety Relief
CAGE
94611

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 1478-3-4IN300PSI NSN 4820-01-015-1297

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

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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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