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4820-00-889-2425

Safety Relief Valve

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Official Item Classification

Name
Safety Relief Valve
(NSN) National Stock Number
4820-00-889-2425
(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
01/01/1962 (64 years ago)

poppet flow control device, 8 2nd end bolt hole quantity, 8 1st end bolt hole quantity, spring disk loading method, 31000.0 pounds per hour valve discharge flow rate

Specs & Compatibility

Flow Control Device

poppet

Disk Loading Method

spring

Valve Discharge Flow Rate

31000.0 pounds per hour

Bolt Hole Quantity

8 1st end

Bolt Hole Quantity

8 2nd end

Maximum Operating Temp

775.0 fahrenheit single response

Valve Operation Method

automatic

Flange Shape

round with holes 1st end

Flange Shape

round with holes 2nd end

Connection Type

flange 1st end

Connection Type

flange 2nd end

Features Provided

valve stem lock shield

Adjustable Pressure Range

+696.0 to 760.0 pounds per square inch

Maximum Operating Pressure

900.0 pounds per square inch single response

Opening Pressure Setting

700.0 pounds per square inch

Nominal Outside Diameter

7.500 inches 1st end

Nominal Outside Diameter

9.000 inches 2nd end

Nominal Thickness

1.125 inches 1st end

Nominal Thickness

1.188 inches 2nd end

Bolt Hole Nominal Diameter

0.875 inches 2nd end

Bolt Hole Nominal Diameter

0.875 inches 1st end

Bolt Circle Nominal Diameter

5.875 inches 1st end

Bolt Circle Nominal Diameter

7.250 inches 2nd end

Flange Face Design

raised straight 1st end

Flange Face Design

raised straight 2nd end

Raised Face Nominal Height

0.062 inches 2nd end

Raised Face Nominal Height

0.688 inches 1st end

Raised Face Nominal Diameter

5.000 inches 1st end

Raised Face Nominal Diameter

5.500 inches 2nd end

Material

nickel alloy stem

Material

nickel alloy and steel corrosion resisting flow control device

Material

steel body

Material

steel corrosion resisting seat

Style Designator

angle

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

Related Hardware Products

Part Number Description
5355008892425 Safety Relief Valve
A34150ANDH45856SH4 Safety Relief Valve

Frequently Asked Questions

What is the FSCG of the NSN 4820-00-889-2425?
The FSCG of the NSN 4820-00-889-2425 is 4820
Does the NSN 4820-00-889-2425 have a Schedule B code assigned?
Yes, the Schedule B code is 8481400000
Does NSN 4820-00-889-2425 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 4820-00-889-2425 contain precious materials?
Item does not contain precious metal.
Does NSN 4820-00-889-2425 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 4820-00-889-2425 was assigned to the Federal Catalog?
It was assigned 64 years ago, on Mon, Jan 1, 1962