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Safety Relief Valve NSN 4820-00-998-1739

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 4820-00-998-1739 NSN: 4820-00-998-1739

Features and Characteristics

Pipe Size Accommodated
0.250 inches 1st end
Thread Direction
Right-hand 1st end
Flow Control Device
Poppet
Bonnet Type
Inside spring
Bonnet Attachment Method
Threaded
Disk Loading Method
Spring
Connection Style
G9 plain, optional en (pipe) 1st end
Valve Operation Method
Automatic
Connection Type
Threaded internal pipe 1st end
Features Provided
Valve stem lock shield and bonnet packing and pressure tight outlet side
Thready Qty Per Inch (tpi)
18 1st end
Maximum Operating Pressure
200.0 pounds per square inch single response
Thread Size
0.250 inches 2nd end
Criticality Code Justification
Feat
Opening Pressure Setting
1.0 pounds per square inch
Special Features
Clean for oxygen
Material
Aluminum alloy seat
Media For Which Designed
Water-oil-gas single response
Style Designator
Err-090
Thread Series Designator
Npt 1st end
FSC
4820 Nonpowered Valves
NIIN
009981739
NSN
4820009981739

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
P891-2
Cage Code:
99251
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 4820-00-998-1739
What are the manufacturers of nsn 4820009981739?
Does this nsn 4820009981739 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820009981739
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 4820009981739 contain any precious metals?
Precious metal content is unknown.
Does nsn 4820009981739 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820009981739?
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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