4820-01-021-2757

Find complete technical information, availability, and procurement data for: 4820-01-021-2757
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-021-2757

Item Name Code

05488

Assigment Date

05/12/1976 (50 years ago)

poppet flow control device, threaded bonnet attachment method, right-hand 1st end thread direction, inside spring bonnet type, right-hand 2nd end thread direction

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: poppet
Bonnet Type: inside spring
Bonnet Attachment Method: threaded
Disk Loading Method: spring
Renewable Seat Ring Type: threaded
Maximum Operating Temp: 300.0 fahrenheit 2nd response
Maximum Operating Temp: 406.0 fahrenheit 1st response
Connection Style: plain (pipe) 1st end
Connection Style: plain,optional end(pipe) 2nd end
Valve Operation Method: automatic
Connection Type: threaded external pipe 1st end
Connection Type: threaded internal pipe 2nd end
Power Drive Operating Pressure: 50.0 pounds per square inch nominal
Maximum Operating Pressure: 250.0 pounds per square inch 1st response
Maximum Operating Pressure: 300.0 pounds per square inch 2nd response
Nominal Thread Size: 0.750 inches 1st end
Nominal Thread Size: 1.250 inches 2nd end
Opening Pressure Setting: 50.0 pounds per square inch
Material: steel corrosion resisting body
Media For Which Designed: air 2nd response
Media For Which Designed: gas, inert 3rd response
Media For Which Designed: steam 1st response
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
84-4S 3/4X1-1/4-50	Safety Relief Valve
84-S 3/4MX1-1/4F-50	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-021-2757?

The FSCG of the NSN 4820-01-021-2757 is 4820

Does the NSN 4820-01-021-2757 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-021-2757 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 4820-01-021-2757 contain precious materials?

Precious metal content is unknown

Does NSN 4820-01-021-2757 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 4820-01-021-2757 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Wed, May 12, 1976