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Safety Relief Valve NSN 4820-01-218-4611

Item Description

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.

NSN 4820-01-218-4611 NSN: 4820-01-218-4611

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Features and Characteristics

Thread Class
3a all ends
Thread Direction
Right-hand all ends
Flow Control Device
Poppet
Disk Loading Method
Spring
Maximum Operating Temp
280.0 degrees fahrenheit single response
Minimum Operating Temp
-40.0 degrees fahrenheit
Connection Style
G42 flared (tube) all ends
Valve Operation Method
Automatic
Connection Type
Threaded external tube all ends
Thready Qty Per Inch (tpi)
20 all ends
Adjustable Pressure Range
+0.5/+2.5 pounds per square inch
Maximum Operating Pressure
200.0 pounds per square inch single response
Thread Size
0.438 inches all ends
Seat Angle
37.0 degrees all ends
Material
Rubber synthetic packing
Material Specification
Mil-p-25732 military specification single material response packing
Media For Which Designed
Hydrogen 4th response
Style Designator
Err-090
Thread Series Designator
Unjf all ends
Furnished Items And Quantity
1 deflector cap
FSC
4820 Nonpowered Valves
NIIN
012184611
NSN
4820012184611

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
D559A-4D-1
Cage Code:
91816
Status:
A
MSDS:
Part Number:
Z02RD04A010B
Cage Code:
62701
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 8481400000
  • NAICS: 332911
  • SITC: 74740
  • Description: Safety or relief valves
  • End Use (Code 21180):
    Industrial machines, other

Q & A

Frequently asked questions for NSN 4820-01-218-4611
What are the manufacturers of nsn 4820012184611?
Does this nsn 4820012184611 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820012184611
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.
Does nsn 4820012184611 contain any precious metals?
No precious metal content.
Does nsn 4820012184611 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820012184611?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
05488
FIIG:
A046B0
App. Key:
AP
Cond. Code:
1
Status:
A

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