4820-01-139-1897

Find complete technical information, availability, and procurement data for: 4820-01-139-1897
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-139-1897

Item Name Code

05488

Assigment Date

09/26/1982 (43 years ago)

A valve designed to control the flow of a fluid by the rotation of a ported plug or plug sector within a suitable ported seat. The plug requires lubrication for ease of operation or contains a bonded composition seal(s). See also valve, seatless and cock, plug.

bolted bonnet attachment method, streamlined with one brazing ring (tube) 1st end connection style, disk flow control device, inside spring bonnet type, 150.0 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.

Flow Control Device: disk
Bonnet Type: inside spring
Bonnet Attachment Method: bolted
Maximum Operating Temp: 150.0 fahrenheit single response
Connection Style: streamlined with one brazing ring (tube) 1st end
Valve Operation Method: automatic
Flange Shape: round 2nd end
Connection Type: flange 2nd end
Connection Type: unthreaded internal tube 1st end
Adjustable Pressure Range: +211.0 to 240.0 pounds per square inch
Maximum Operating Pressure: 250.0 pounds per square inch single response
Nominal Outside Diameter: 3.812 inches 2nd end
Nominal Thickness: 0.688 inches 2nd end
Flange Face Design: plain 2nd end
Nominal Outside Diameter Tube Accommodated: 0.750 inches 1st end
Material: copper alloy body
Material: nickel alloy stem
Material: plastic polychlorotrifluoroethylene seat
Material: plastic polychlorotrifluoroethylene flow control device
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
20346 PART20346T51M	Safety Relief Valve
20346T51M	Safety Relief Valve
BEMAA08SDD	Safety Relief Valve
D54FU 211T240 3/4 IN.	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-139-1897?

The FSCG of the NSN 4820-01-139-1897 is 4820

Does the NSN 4820-01-139-1897 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-139-1897 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 4820-01-139-1897 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-139-1897 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 4820-01-139-1897 was assigned to the Federal Catalog?

It was assigned 43 years ago, on Sun, Sep 26, 1982