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Safety Relief Valve NSN 4820-00-166-0278

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 4820-00-166-0278 NSN: 4820-00-166-0278

Features and Characteristics

Flow Control Device
Disk
Bonnet Type
Exposed spring
Bonnet Attachment Method
Bolted
Disk Loading Method
Spring
Valve Discharge Flow Rate
8900.0 pounds per hour
Renewable Seat Ring Type
Threaded
Bolt Hole Quantity
8 1st end
Valve Operation Method
Automatic or manual
Flange Shape
Round with holes 2nd end
Connection Type
Flange 1st end
Features Provided
Pressure tight outlet side
Valve Size
1.500 inches
Opening Pressure Setting
700.0 pounds per square inch
Outside Diameter
6.500 inches 1st end
Thickness
0.875 inches 2nd end
Bolt Hole Diameter
0.875 inches 2nd end
Bolt Circle Diameter
5.000 inches 1st end
Flange Face Design
Plain 2nd end
Raised Face Height
0.062 inches 1st end
Raised Face Diameter
3.625 inches 1st end
Special Features
The end connection identified above as the second end is the valve inlet
Style Designator
Angle flanged ends
Reference Number Differentiating Characteristics
As differentiated by the valve discharge flow rate requirement and as modified by crosby valve and gage co drawing h43589 sheet 2
FSC
4820 Nonpowered Valves
NIIN
001660278
NSN
4820001660278

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
A34153
Cage Code:
15187
Status:
A
MSDS:
Part Number:
A34153 M0D
Cage Code:
15187
Status:
A
MSDS:
Part Number:
3176765
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 4820-00-166-0278
What are the manufacturers of nsn 4820001660278?
Does this nsn 4820001660278 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820001660278
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 4820001660278 contain any precious metals?
No precious metal content.
Does nsn 4820001660278 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820001660278?
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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