4820-01-338-6421

Find complete technical information, availability, and procurement data for: 4820-01-338-6421
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-338-6421

Item Name Code

05488

Assigment Date

05/08/1991 (35 years ago)

A valve that controls flow by a circular disk, or a pair of semicircular disks, attached to a common spindle or lever turning on a diametral axis.

disk flow control device, inside spring bonnet type, integral bonnet attachment method, 4 all ends bolt hole quantity, spring disk loading method

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: integral
Disk Loading Method: spring
Bolt Hole Quantity: 4 all ends
End Item Identification: supply class aoe
Valve Operation Method: automatic
Flange Shape: round with holes all ends
Connection Type: flange all ends
Valve Size: 2.000 inches
Adjustable Pressure Range: +57.0 to 64.0 pounds per square inch
Nominal Outside Diameter: 6.000 inches all ends
Nominal Thickness: 0.500 inches all ends
First Connection Face To Centerline Distance: 4.500 inches
Bolt Hole Nominal Diameter: 0.750 inches all ends
Second Connection Face To Centerline Distance: 4.000 inches
Bolt Circle Nominal Diameter: 4.750 inches all ends
Flange Face Design: plain all ends
Material: copper alloy body
Material: nickel alloy flow control device
Material: nickel alloy seat
Material: nickel alloy stem
Media For Which Designed: water, salt single response
Style Designator: angle flanged ends

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
DLO-10H/B2 CDS65	Safety Relief Valve
DLO-10H/B2 CDS653	Safety Relief Valve
DLO-10H/B2 CDS653 NMP-1112	Safety Relief Valve
NMP111207G0060	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-338-6421?

The FSCG of the NSN 4820-01-338-6421 is 4820

Does the NSN 4820-01-338-6421 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-338-6421 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 4820-01-338-6421 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-338-6421 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 4820-01-338-6421 was assigned to the Federal Catalog?

It was assigned 35 years ago, on Wed, May 8, 1991