4820-01-128-2257

Find complete technical information, availability, and procurement data for: 4820-01-128-2257
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-128-2257

Item Name Code

05488

Assigment Date

03/18/1982 (44 years ago)

bolted bonnet attachment method, 150.0 fahrenheit single response maximum operating temp, spring disk loading method, disk flow control device, inside spring bonnet type

Product Characteristics

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

Flow Control Device: disk
Bonnet Type: inside spring
Bonnet Attachment Method: bolted
Disk Loading Method: spring
Maximum Operating Temp: 150.0 fahrenheit single response
Connection Style: socket with brazing ring (tube) all ends
Valve Operation Method: automatic
Connection Type: unthreaded internal tube all ends
Adjustable Pressure Range: +25.0 to 29.0 pounds per square inch
Maximum Operating Pressure: 400.0 pounds per square inch single response
Nominal Outside Diameter Tube Accommodated: 1.500 inches all ends
Material: copper alloy body
Material: copper alloy flow control device
Material: copper alloy seat
Material: copper alloy stem
Material: rubber butadiene-acrylonitrile class nbr packing
Material Document And Classification: qq-b-637 fed spec single material response stem
Material Document And Classification: qq-c-390,alloy d4/d/ fed spec single material response flow control device
Material Document And Classification: qq-c-390,alloy d4/d/ fed spec single material response seat
Material Document And Classification: qq-c-390,alloy dr/d/ fed spec single material response body
Media For Which Designed: air 1st response
Media For Which Designed: water, salt 2nd response
Style Designator: angle

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
3,305,277	Safety Relief Valve
E8530E41B	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-128-2257?

The FSCG of the NSN 4820-01-128-2257 is 4820

Does the NSN 4820-01-128-2257 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-128-2257 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 4820-01-128-2257 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-128-2257 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 4820-01-128-2257 was assigned to the Federal Catalog?

It was assigned 44 years ago, on Thu, Mar 18, 1982