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Safety Relief Valve NSN 4820-00-202-6638

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 4820-00-202-6638 NSN: 4820-00-202-6638

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Features and Characteristics

Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Union
Disk Loading Method
Spring
Renewable Seat Ring Type
Welded
Bolt Hole Quantity
6 all ends
Valve Operation Method
Automatic or manual
Flange Shape
Round with holes all ends
Connection Type
Flange all ends
Valve Size
2.000 inches
Adjustable Pressure Range
+18.0/+32.0 pounds per square inch
Maximum Operating Pressure
100.0 pounds per square inch single response
Outside Diameter
5.562 inches all ends
Thickness
0.438 inches all ends
First Connection Face To Centerline Distance
4.750 inches
Bolt Hole Diameter
0.562 inches all ends
Second Connection Face To Centerline Distance
5.250 inches
Bolt Circle Diameter
4.438 inches all ends
Flange Face Design
Plain all ends
Material
Nickel alloy r-405 stem or copper alloy 462 stem
Material Specification
Qq-n-281 cl b federal specification 1st material response stem or mil-b-994 cl d military specification 2nd material response stem
Media For Which Designed
Water, salt 1st response
Style Designator
Angle flanged ends
FSC
4820 Nonpowered Valves
NIIN
002026638
NSN
4820002026638

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
BAMGG03MHH
Cage Code:
5P967
Status:
A
MSDS:
Part Number:
L-2210-C 2IN MONEL TRIM
Cage Code:
15187
Status:
A
MSDS:
Part Number:
NMP-149
Cage Code:
01343
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 4820-00-202-6638
What are the manufacturers of nsn 4820002026638?
Does this nsn 4820002026638 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820002026638
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 4820002026638 contain any precious metals?
Precious metal content is unknown.
Does nsn 4820002026638 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820002026638?
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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