DS2161-1PC277WS11-4

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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-202-9798

Item Name Code

05487

Assigment Date

01/01/1961 (65 years ago)

weight disk loading method, disk flow control device, 1.250 inches all ends nominal pipe size accommodated, threaded renewable seat ring type, 550.0 fahrenheit single response maximum operating temp

Product Characteristics

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

Nominal Pipe Size Accommodated: 1.250 inches all ends
Flow Control Device: disk
Disk Loading Method: weight
Renewable Seat Ring Type: threaded
Maximum Operating Temp: 550.0 fahrenheit single response
Connection Style: socket with brazing ring (pipe) all ends
Valve Operation Method: automatic
Connection Type: unthreaded internal pipe all ends
Mounting Position: horizontal
Maximum Operating Pressure: 300.0 pounds per square inch 1st response
Maximum Operating Pressure: 700.0 pounds per square inch 2nd response
Material: copper alloy 922 body
Material: copper alloy 922 stem
Material: nickel alloy flow control device
Material: nickel alloy seat
Material Document And Classification: qq-c-390,alloy d4 fed spec single material response body
Material Document And Classification: qq-c-390,alloy d4 fed spec single material response stem
Media For Which Designed: steam 1st response
Media For Which Designed: water-oil-gas 2nd response
Style Designator: straight thru

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-00-694-9837	No Name Available	01/01/1982

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
220WS1 1-4	Check Valve
277WS1 1-4	Check Valve
DS2161-1PC277WS11-4	Check Valve
SS845-1889587ASYB1-1/4	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-202-9798?

The FSCG of the NSN 4820-00-202-9798 is 4820

Does the NSN 4820-00-202-9798 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-00-202-9798 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 4820-00-202-9798 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-202-9798 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 4820-00-202-9798 was assigned to the Federal Catalog?

It was assigned 65 years ago, on Sun, Jan 1, 1961