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Safety Relief Valve NSN 4820-00-078-6591

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 4820-00-078-6591 NSN: 4820-00-078-6591

Features and Characteristics

Pipe Size Accommodated
1.000 inches 2nd end
Thread Direction
Right-hand 1st end
Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Integral
Disk Loading Method
Spring
Maximum Operating Temp
400.0 degrees fahrenheit single response
Connection Style
Plain, optional en (pipe) 1st end
Valve Operation Method
Automatic
Connection Type
Threaded internal pipe 1st end
Features Provided
Pressure tight outlet side
Thready Qty Per Inch (tpi)
11-1/2 2nd end
Adjustable Pressure Range
+1.0/+250.0 pounds per square inch
Maximum Operating Pressure
250.0 pounds per square inch single response
Thread Size
1.000 inches 2nd end
Opening Pressure Setting
15.0 pounds per square inch
Material
Steel stem
Style Designator
Angle
Thread Series Designator
Npt 1st end
Reference Number Differentiating Characteristics
As differentiated by operating pressure, valve size, and pipe and thread size
FSC
4820 Nonpowered Valves
NIIN
000786591
NSN
4820000786591

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
2601
Cage Code:
14959
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 4820-00-078-6591
What are the manufacturers of nsn 4820000786591?
Does this nsn 4820000786591 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820000786591
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 4820000786591 contain any precious metals?
Precious metal content is unknown.
Does nsn 4820000786591 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820000786591?
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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