Model: 3R1908

Safety Relief Valve

Special Features:

1 to 5 psig check pressure

Properties:

Thread Class
3a all ends
Thread Direction
Right-hand all ends
Flow Control Device
Disk
Maximum Operating Temp
275.0 degrees fahrenheit single response
End Application
4720-01-290-7430
Connection Style
G45 flareless (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
4000.0 pounds per square inch single response
Thread Size
0.438 inches all ends
Seat Angle
24.0 degrees all ends
Opening Pressure Setting
50.0 pounds per square inch
Material
Stainless steel bodystainless steel flow control device
Media For Which Designed
Hydraulic fluid, petroleum base single response
Thread Series Designator
Unj all ends
NSN
4820-01-344-1622
Part Number
3R1908
Description
Valve,safety Relief
CAGE
99240

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 3R1908 NSN 4820-01-344-1622

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:
BA
CRITL:
N

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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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