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System Pressure Regulating Valve NSN 4820-01-259-8851

Item Description

A value designed to automatically maintain within close limits a predetermined pressure within a closed system regardless of the higher fluctuating or constant inlet pressure. The excess pressure is by-passed to the accumulator or reservoir in lieu of passing through the entire system. It is designed primarily for use in refrigeration and air conditioning systems. Excludes valve, regulating, fluid pressure and valve, calibrated flow.

NSN 4820-01-259-8851 NSN: 4820-01-259-8851

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Features and Characteristics

Body Material
Aluminum
Body Style
Straight thru
Stem Material
Aluminum
Media For Which Designed
Air
First End Connection Type
Threaded external pipe
First End Thread Size And Series/type Designator
1/4-18 nptf
First End Thread Direction
Right-hand
Second End Relationship With First End
Identical
Seat Material
Aluminum
Flow Control Device
Diaphragm
Flow Control Device Material
Rubber
End Connection Quantity
2
Outlet Pressure Range
+0.0/+50.0 pounds per square inch
Regulation Type
1st stage manual, 2nd stage automatic
Valve Stem Design
Double seat
Maximum Inlet Pressure Rating
250.0 pounds per square inch
Outlet Pressure Setting
50.0 pounds per square inch
Filter
Not included
Special Features
2 ports for gages
FSC
4820 Nonpowered Valves
NIIN
012598851
NSN
4820012598851

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
P55675
Cage Code:
65035
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 8481809015
  • NAICS: 332911
  • SITC: 74780
  • Description: Regulator valves, self-operating, for controlling variables such as temperature, pressure, flow and liquid level
  • End Use (Code 21180):
    Industrial machines, other

Q & A

Frequently asked questions for NSN 4820-01-259-8851
What are the manufacturers of nsn 4820012598851?
Does this nsn 4820012598851 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820012598851
A value designed to automatically maintain within close limits a predetermined pressure within a closed system regardless of the higher fluctuating or constant inlet pressure. the excess pressure is by-passed to the accumulator or reservoir in lieu of passing through the entire system. it is designed primarily for use in refrigeration and air conditioning systems. excludes valve, regulating, fluid pressure and valve, calibrated flow.
Does nsn 4820012598851 contain any precious metals?
No precious metal content.
Does nsn 4820012598851 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820012598851?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
35896
FIIG:
A21100
App. Key:
D
Cond. Code:
1
Status:
A

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