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4820-01-308-5209

Safety Relief Valve

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Official Item Classification

Name
Safety Relief Valve
(NSN) National Stock Number
4820-01-308-5209
(FSG) Federal Supply Group
48 Valves
(FSC) Federal Supply Classification
4820 Nonpowered Valves
(INC) Item Name Code
05488
(FIIG) Federal Item Identification Guide
A046B0
Date
09/29/1989 (37 years ago)

8 all ends bolt hole quantity, disk flow control device, bolted bonnet attachment method, 250.0 fahrenheit single response maximum operating temp, inside screw bonnet type

Specs & Compatibility

Flow Control Device

disk

Bonnet Type

inside screw

Bonnet Attachment Method

bolted

Bolt Hole Quantity

8 all ends

Maximum Operating Temp

250.0 fahrenheit single response

Valve Operation Method

automatic

Flange Shape

round with holes all ends

Connection Type

flange all ends

Valve Size

4.000 inches

Maximum Operating Pressure

225.0 pounds per square inch single response

Opening Pressure Setting

75.0 pounds per square inch

Nominal Outside Diameter

11.000 inches 1st end

Nominal Outside Diameter

9.000 inches 2nd end

Nominal Thickness

0.938 inches 2nd end

Nominal Thickness

1.000 inches 1st end

First Connection Face To Centerline Distance

8.250 inches

Bolt Hole Nominal Diameter

0.750 inches 2nd end

Bolt Hole Nominal Diameter

0.875 inches 1st end

Second Connection Face To Centerline Distance

7.750 inches

Bolt Circle Nominal Diameter

7.500 inches 2nd end

Bolt Circle Nominal Diameter

9.500 inches 1st end

Flange Face Design

raised straight all ends

Raised Face Nominal Height

0.062 inches 1st end

Raised Face Nominal Height

0.688 inches 2nd end

Raised Face Nominal Diameter

6.188 inches 2nd end

Raised Face Nominal Diameter

8.500 inches 1st end

Material

steel body

Material

steel comp 303 flow control device

Material

steel comp 416 stem

Style Designator

angle flanged ends

Regulatory Compliance

Precious Metals Indicator
A

Item does not contain precious metal.

Criticality Code
X

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator
N

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Pseudo Item Name Code

0005488

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Frequently Asked Questions

What is the FSCG of the NSN 4820-01-308-5209?
The FSCG of the NSN 4820-01-308-5209 is 4820
Does the NSN 4820-01-308-5209 have a Schedule B code assigned?
Yes, the Schedule B code is 8481400000
Does NSN 4820-01-308-5209 require demilitarization?
Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
Does NSN 4820-01-308-5209 contain precious materials?
Item does not contain precious metal.
Does NSN 4820-01-308-5209 contain hazardous materials?
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
When the NSN 4820-01-308-5209 was assigned to the Federal Catalog?
It was assigned 37 years ago, on Fri, Sep 29, 1989