4820-00-287-4049

Find complete technical information, availability, and procurement data for: 4820-00-287-4049
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-287-4049

Item Name Code

05488

Assigment Date

01/01/1963 (63 years ago)

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.

spring disk loading method, round with holes 1st end flange shape, 8 1st end bolt hole quantity, 40500.0 pounds per hour valve discharge flow rate, 9 2nd end bolt hole quantity

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Disk Loading Method: spring
Valve Discharge Flow Rate: 40500.0 pounds per hour
Bolt Hole Quantity: 9 2nd end
Bolt Hole Quantity: 8 1st end
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
Opening Pressure Setting: 639.0 pounds per square inch
Nominal Outside Diameter: 7.500 inches 1st end
Nominal Outside Diameter: 8.688 inches 2nd end
Bolt Hole Nominal Diameter: 0.812 inches 1st end
Bolt Hole Nominal Diameter: 0.812 inches 2nd end
Bolt Circle Nominal Diameter: 5.875 inches 1st end
Bolt Circle Nominal Diameter: 7.125 inches 2nd end
Flange Face Design: plain 2nd end
Flange Face Design: raised straight 1st end
Special Features: w/lifting lever
Style Designator: angle

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-00-202-8389	No Name Available	08/18/1969

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
A20675	Safety Relief Valve
DD445S5103-118	Safety Relief Valve

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 4820-00-287-4049?

The FSCG of the NSN 4820-00-287-4049 is 4820

Does the NSN 4820-00-287-4049 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-287-4049 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 4820-00-287-4049 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-287-4049 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 4820-00-287-4049 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963