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Safety Relief Valve NSN 4820-01-256-8745

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 4820-01-256-8745 NSN: 4820-01-256-8745

Features and Characteristics

Flow Control Device
Disk
Disk Loading Method
Spring
Maximum Operating Temp
165.0 degrees fahrenheit single response
Maximum Operating Pressure
460.0 pounds per square inch single response
Criticality Code Justification
Zzzy
Material
Stainless steel stem
Material Specification
Astm b61 assn standard single material response body
Media For Which Designed
Oxygen, liquid single response
Style Designator
Err-090
Furnished Items And Quantity
2 tailpiece
Reference Number Differentiating Characteristics
Requires special cleaning and packaging iaw mil-c-52211, for oxygen/nitrogen/hydrogen service
FSC
4820 Nonpowered Valves
NIIN
012568745
NSN
4820012568745

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
D841-4052
Cage Code:
96101
Status:
A
MSDS:
Part Number:
D841-4952
Cage Code:
96101
Status:
A
MSDS:
Part Number:
D841-4052CP
Cage Code:
03950
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 4820-01-256-8745
What are the manufacturers of nsn 4820012568745?
Does this nsn 4820012568745 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820012568745
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 4820012568745 contain any precious metals?
No precious metal content.
Does nsn 4820012568745 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820012568745?
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
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