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Safety Relief Valve NSN 4820-01-268-0594

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 4820-01-268-0594 NSN: 4820-01-268-0594

Features and Characteristics

Thread Direction
Right-hand 1st end
Flow Control Device
Disk
Bonnet Type
Inside screw
Bonnet Attachment Method
Threaded
Disk Loading Method
Spring
Maximum Operating Temp
450.0 degrees fahrenheit single response
Connection Style
G9 plain, optional en (pipe) 2nd end
Connection Type
Threaded internal pipe 2nd end
Maximum Operating Pressure
300.0 pounds per square inch single response
Thread Size
0.750 inches 2nd end
Criticality Code Justification
Zzzy
Opening Pressure Setting
20.0 pounds per square inch
Special Features
Clean per mil-std-767 and aor-767-1; inspect per mil-i-45208; ship per mil-std-129
Material
Copper alloy
Media For Which Designed
Air 2nd response
Style Designator
Err-090
Thread Series Designator
Npt 1st end
Reference Number Differentiating Characteristics
Material will be in accordance with ships parts control center activity hx quality control, manufacturing and testing specifications
FSC
4820 Nonpowered Valves
NIIN
012680594
NSN
4820012680594

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
1856M-OL-1/2X3/4-20PSI
Cage Code:
72352
Status:
A
MSDS:
Part Number:
18252-F(20PSI)
Cage Code:
72352
Status:
A
MSDS:
Part Number:
1896M-OL-1/2X3/4-20PSI(SPCLN)
Cage Code:
72352
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 4820-01-268-0594
What are the manufacturers of nsn 4820012680594?
Does this nsn 4820012680594 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820012680594
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 4820012680594 contain any precious metals?
No precious metal content.
Does nsn 4820012680594 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820012680594?
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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  •   On Time Delivery
  •   Certificate of Conformance
  •   Quality Inspected Parts
  •   Quality Fast Service
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