4820-00-155-3664

Find complete technical information, availability, and procurement data for: 4820-00-155-3664
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-155-3664

Item Name Code

20520

Assigment Date

10/24/1971 (54 years ago)

A valve having an orifice in the poppet, disk, or the like, to permit restricted fluid flow when the valve is seated. It does not have a stem or provisions for pressure adjustments, and is similar to a valve, check with the exception of the orifice which permits fluid flow in more than one direction.

threaded renewable seat ring type, 1.000 inches nominal aperture diameter, disk flow control device, right-hand all ends thread direction, 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.

Thread Direction: right-hand all ends
Aperture Diameter: 1.000 inches nominal
Flow Control Device: disk
Disk Loading Method: spring
Renewable Seat Ring Type: threaded
Maximum Operating Temp: 160.0 fahrenheit single response
Connection Style: plain, optional end (pipe) all ends
Valve Operation Method: automatic
Connection Type: threaded internal pipe all ends
Mounting Position: horizontal
Maximum Operating Pressure: 125.0 pounds per square inch single response
Nominal Thread Size: 1.000 inches all ends
Material: copper alloy body
Style Designator: straight thru
Thread Series Designator: npt all 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
11241418-7	Restrictor Check Valve
12GX	Restrictor Check Valve
64781	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-155-3664?

The FSCG of the NSN 4820-00-155-3664 is 4820

Does the NSN 4820-00-155-3664 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-00-155-3664 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 4820-00-155-3664 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-155-3664 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 4820-00-155-3664 was assigned to the Federal Catalog?

It was assigned 54 years ago, on Sun, Oct 24, 1971