4820-01-198-4201

Find complete technical information, availability, and procurement data for: 4820-01-198-4201
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-198-4201

Item Name Code

08101

Assigment Date

01/09/1985 (41 years ago)

A valve designed to release under excessive pressure and/or excessive temperature by opening at a predetermined pressure and/or temperature. Thermostatically operated valves close when the pressure is relieved or the temperature is reduced. Fusible plug valves require replacement of the plug. See also valve, safety relief and valve, regulating. Temperature.

0.250 inches first end nominal pipe size accommodated, not identical second end relationship with first end, threaded external pipe first end connection type, single connection, straight flow body style, plain face flange second end connection type

Product Characteristics

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

Body Style: single connection, straight flow
First End Connection Type: threaded external pipe
First End Nominal Pipe Size Accommodated: 0.250 inches
Second End Relationship With First End: not identical
Second End Connection Type: plain face flange
Second End Style Designator: plain
Second End Flange Shape Style: hexagon w/ bolt holes
Second End Width Across Flats: 0.750 inches nominal
End Connection Quantity: 2
Absolute Pressure Setting: 0.5
Body Material: steel comp 303
Special Features: operating pressure: 0-100 psi; operating temp: -40 to 105 deg celcius
Material Document And Classification: stm a582 ty 303 assn std single material response

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
4820PL0977403	Vacuum Breaking Valve
5189440	Vacuum Breaking Valve
P4-262T	Vacuum Breaking Valve

FAQs

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

What is the FSCG of the NSN 4820-01-198-4201?

The FSCG of the NSN 4820-01-198-4201 is 4820

Does the NSN 4820-01-198-4201 have a Schedule B code assigned?

Yes, the Schedule B code is 8481809050

Does NSN 4820-01-198-4201 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 4820-01-198-4201 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-198-4201 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 4820-01-198-4201 was assigned to the Federal Catalog?

It was assigned 41 years ago, on Wed, Jan 9, 1985