CRV-250B-K-400

View detailed technical data, stock status, and sourcing information for: CRV-250B-K-400
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-668-5866

Item Name Code

16996

Assigment Date

11/29/2017 (8 years ago)

A metal or plastic item of various shapes with two flat bearing surfaces. It is designed to maintain a predetermined distance between parts of an assembly. The item has one or more through holes parallel to its axis, and is unthreaded.

threaded external pipe first end connection type, 0.25 inches first end nominal pipe size accommodated, oxygen, liquid media for which designed, -320.0 fahrenheit and 165.0 fahrenheit temp rating, straight thru body style

Product Characteristics

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

Body Style: straight thru
Temp Rating: -320.0 fahrenheit and 165.0 fahrenheit
Media For Which Designed: oxygen, liquid
First End Connection Type: threaded external pipe
First End Nominal Pipe Size Accommodated: 0.25 inches
Second End Relationship With First End: not identical
Second End Connection Type: threaded internal pipe
End Connection Quantity: 2
Opening Pressure Setting: 400.0 pounds per square inch
First End Thread Series Designator: npt
Part Name Assigned By Controlling Agency: cryogenic relief valve
Special Features: seal material pctfe (astm d1430), relief pressure can not be altered or adjusted in the field, supplied factory preset and permaently locked for tamper proof service
Material: copper alloy 360 body
Material Document And Classification: astm b16-60, 1/2h assn std single material response body

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
CRV-250B-K-400	Pressure and Temper Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-668-5866?

The FSCG of the NSN 4820-01-668-5866 is 4820

Does the NSN 4820-01-668-5866 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-668-5866 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 4820-01-668-5866 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-668-5866 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 4820-01-668-5866 was assigned to the Federal Catalog?

It was assigned 8 years ago, on Wed, Nov 29, 2017