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Safety Relief Valve NSN 4820-01-178-2939

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 4820-01-178-2939 NSN: 4820-01-178-2939

Features and Characteristics

Thread Class
3a all ends
Thread Direction
Right-hand all ends
Flow Control Device
Poppet
Valve Discharge Flow Rate
1.0 gallons per minute
Maximum Operating Temp
275.0 degrees fahrenheit single response
Connection Style
G45 flareless (tube) all ends
Valve Operation Method
Automatic
Connection Type
Threaded external tube all ends
Thready Qty Per Inch (tpi)
20 2nd end
Maximum Operating Pressure
140.0 pounds per square inch single response
Thread Size
0.562 inches 1st end
Seat Angle
12.0 degrees all ends
Opening Pressure Setting
120.0 pounds per square inch
Material
Aluminum alloy 2024 body
Material Specification
Qq-a-225/6 federal specification single material response body
Media For Which Designed
Oil, hydraulic single response
Surface Treatment
Anodize
Surface Treatment Specification
Mil-a-8625, type 2 military specification single treatment response
Style Designator
Err-090
Thread Series Designator
Unjf all ends
FSC
4820 Nonpowered Valves
NIIN
011782939
NSN
4820011782939

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
2R2934
Cage Code:
99240
Status:
A
MSDS:
Part Number:
TE20521
Cage Code:
80206
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 4820-01-178-2939
What are the manufacturers of nsn 4820011782939?
Does this nsn 4820011782939 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820011782939
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 4820011782939 contain any precious metals?
No precious metal content.
Does nsn 4820011782939 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820011782939?
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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  •   Certificate of Conformance
  •   Quality Inspected Parts
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