639AS595

View detailed technical data, stock status, and sourcing information for: 639AS595
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-045-4798

Item Name Code

05488

Assigment Date

08/02/1977 (49 years ago)

A multi-ported, nonlubricated valve designed to provide straight through flow or ability to direct a number of flows or pressure through a single valve. The flow is controlled by the rotation of a ported ball within a suitable ported seat(s). The ball is usually engaged by a stem. It is normally operated in an open or closed position. Excludes:valve, check.

spring disk loading method, inside spring bonnet type, poppet flow control device, right-hand 1st end thread direction, integral bonnet attachment method

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
Flow Control Device: poppet
Bonnet Type: inside spring
Bonnet Attachment Method: integral
Disk Loading Method: spring
Valve Discharge Flow Rate: 10.0 liters per minute
Maximum Operating Temp: 121.0 celsius single response
Connection Style: plain (pipe) 1st end
Valve Operation Method: automatic
Connection Type: threaded external pipe 1st end
Nominal Thread Size: 0.125 inches 1st end
Opening Pressure Setting: 1.5 pounds per square inch
Special Features: hex. 0.500 in. across flats
Material: steel comp 302 or steel comp 304 or steel comp 316 body
Material Document And Classification: qq-s-763 fed spec all material responses body
Media For Which Designed: gas, natural single response
Surface Treatment: passivate
Style Designator: angle
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
588.10-100000-003	Safety Relief Valve
639AS595	Safety Relief Valve
806R1A02	Safety Relief Valve
806RLA02-3	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-045-4798?

The FSCG of the NSN 4820-01-045-4798 is 4820

Does the NSN 4820-01-045-4798 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-045-4798 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 4820-01-045-4798 contain precious materials?

Precious metal content is unknown

Does NSN 4820-01-045-4798 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 4820-01-045-4798 was assigned to the Federal Catalog?

It was assigned 49 years ago, on Tue, Aug 2, 1977