4820-01-198-4203

Find complete technical information, availability, and procurement data for: 4820-01-198-4203
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-198-4203

Item Name Code

16996

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.

straight thru body style, hydraulic fluid, silicate-ester base media for which designed, threaded internal boss first end connection type, swivel nut, gasket seal first end style designator, 125.0 fahrenheit temp rating

Product Characteristics

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

Body Style: straight thru
Temp Rating: 125.0 fahrenheit
Media For Which Designed: hydraulic fluid, silicate-ester base
First End Connection Type: threaded internal boss
First End Style Designator: swivel nut, gasket seal
First End Thread Class: 3b
First End Thread Direction: right-hand
Second End Relationship With First End: not identical
Second End Connection Type: threaded external boss
Second End Style Designator: flared
Second End Thread Class: 3a
Second End Thread Direction: right-hand
Face To Face Distance: 2.890 inches nominal
Flow Control Device: disk, flat
End Connection Quantity: 2
Opening Pressure Setting: 80.0 pounds per square inch
Valve Discharge Flow Rate: 10.0 gallons per minute
Temp Adjustability: not adjustable
Temp Control Device Type: thermostatic
First End Thread Series Designator: unjf
First End Nominal Thread Size: 0.750 inches
Second End Nominal Thread Size: 0.750 inches
Second End Thread Series Designator: unj
Material: steel comp 316 body
Material: steel comp 316 seat
Material: steel comp 316 stem
Material Document And Classification: fed std 66 fed std single material response or aisi 316 assn std single material response or sae 30316 assn std single material response body
Material Document And Classification: fed std 66 fed std single material response or aisi 316 assn std single material response or sae 30316 assn std single material response seat
Material Document And Classification: fed std 66 fed std single material response or aisi 316 assn std single material response or sae 30316 assn std single material response stem

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
4820PL0977363	Pressure and Temper Relief Valve
5189443	Pressure and Temper Relief Valve
H776A	Pressure and Temper Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-198-4203?

The FSCG of the NSN 4820-01-198-4203 is 4820

Does the NSN 4820-01-198-4203 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-198-4203 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 4820-01-198-4203 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-198-4203 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 4820-01-198-4203 was assigned to the Federal Catalog?

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