1543H

View detailed technical data, stock status, and sourcing information for: 1543H
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-235-5638

Item Name Code

05488

Assigment Date

07/02/1986 (40 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.

right-hand 2nd end thread direction, right-hand 1st end thread direction, disk flow control device, plain (pipe) 2nd end connection style, plain,optional end(pipe) 1st end connection style

Product Characteristics

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

Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Flow Control Device: disk
Connection Style: plain (pipe) 2nd end
Connection Style: plain,optional end(pipe) 1st end
Valve Operation Method: manual
Connection Type: threaded external pipe 2nd end
Connection Type: threaded internal pipe 1st end
Nominal Thread Size: 1.500 inches 2nd end
Nominal Thread Size: 2.000 inches 1st end
Opening Pressure Setting: 30.0 pounds per square inch
Material: copper alloy body
Style Designator: angle
Thread Series Designator: npt 2nd end
Thread Series Designator: npt 1st end

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
1543H	Safety Relief Valve
28260	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-235-5638?

The FSCG of the NSN 4820-01-235-5638 is 4820

Does the NSN 4820-01-235-5638 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-235-5638 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 4820-01-235-5638 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-235-5638 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 4820-01-235-5638 was assigned to the Federal Catalog?

It was assigned 40 years ago, on Wed, Jul 2, 1986