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Safety Relief Valve NSN 4820-01-121-8056

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 4820-01-121-8056 NSN: 4820-01-121-8056

Features and Characteristics

Thread Direction
Right-hand 1st end
Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Bolted
Disk Loading Method
Spring
Bolt Hole Quantity
4 2nd end
Maximum Operating Temp
450.0 degrees fahrenheit single response
End Application
Used on condensate tank onboard 270 ft wmec cg vessels
Connection Style
Plain, optional en (pipe) 1st end
Valve Operation Method
Automatic
Flange Shape
Round with holes 2nd end
Connection Type
Threaded internal pipe 1st end
Valve Size
4.000 inches
Maximum Operating Pressure
30.0 pounds per square inch single response
Thread Size
4.000 inches 1st end
Outside Diameter
7.000 inches 2nd end
Thickness
0.687 inches 2nd end
First Connection Face To Centerline Distance
5.250 inches
Bolt Hole Diameter
0.625 inches 2nd end
Second Connection Face To Centerline Distance
5.500 inches
Bolt Circle Diameter
5.875 inches 2nd end
Flange Face Design
Raised straight 2nd end
Raised Face Height
0.062 inches 2nd end
Raised Face Diameter
4.687 inches 2nd end
Material
Iron cast body
Style Designator
Angle flanged ends
Thread Series Designator
Npt 1st end
FSC
4820 Nonpowered Valves
NIIN
011218056
NSN
4820011218056

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
1511-L
Cage Code:
16497
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 4820-01-121-8056
What are the manufacturers of nsn 4820011218056?
Does this nsn 4820011218056 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820011218056
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 4820011218056 contain any precious metals?
No precious metal content.
Does nsn 4820011218056 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820011218056?
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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