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Safety Relief Valve NSN 4820-00-401-3974

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 4820-00-401-3974 NSN: 4820-00-401-3974

Features and Characteristics

Flow Control Device
Disk
Bonnet Type
Packing retaining
Valve Discharge Flow Rate
58300.0 pounds per hour
Renewable Seat Ring Type
Threaded
Bolt Hole Quantity
9 2nd end
Valve Operation Method
Automatic
Flange Shape
Round with holes 2nd end
Connection Type
Flange 1st end
Features Provided
Pressure tight outlet side
Outside Diameter
8.688 inches 2nd end
Thickness
1.438 inches 1st end
Bolt Hole Diameter
0.812 inches 2nd end
Bolt Circle Diameter
7.125 inches 2nd end
Flange Face Design
Plain 2nd end
Raised Face Height
0.250 inches 1st end
Raised Face Diameter
5.000 inches 1st end
Material
Stainless steel stem
Style Designator
Angle
Reference Number Differentiating Characteristics
As differentiated by the valve discharge flow rate requirementand the raised face diameter requirement
FSC
4820 Nonpowered Valves
NIIN
004013974
NSN
4820004013974

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
R6180X
Cage Code:
38056
Status:
A
MSDS:
Part Number:
CL55S51-101
Cage Code:
80064
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 4820-00-401-3974
What are the manufacturers of nsn 4820004013974?
Does this nsn 4820004013974 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820004013974
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 4820004013974 contain any precious metals?
No precious metal content.
Does nsn 4820004013974 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820004013974?
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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