8668 ITEM 4 8IN

View detailed technical data, stock status, and sourcing information for: 8668 ITEM 4 8IN
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-148-0087

Item Name Code

05487

Assigment Date

10/06/1971 (54 years ago)

A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

weight disk loading method, disk flow control device, 8 all ends bolt hole quantity, threaded renewable seat ring type, 366.0 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
Disk Loading Method: weight
Renewable Seat Ring Type: threaded
Bolt Hole Quantity: 8 all ends
Maximum Operating Temp: 366.0 fahrenheit single response
Valve Operation Method: automatic
Flange Shape: round with holes all ends
Connection Type: flange all ends
Mounting Position: horizontal
Valve Size: 8.000 inches
Maximum Operating Pressure: 150.0 pounds per square inch 1st response
Maximum Operating Pressure: 225.0 pounds per square inch 2nd response
Nominal Outside Diameter: 13.500 inches all ends
Face To Face Distance: 19.500 inches
Nominal Thickness: 0.938 inches all ends
Bolt Hole Nominal Diameter: 0.875 inches all ends
Bolt Circle Nominal Diameter: 11.750 inches all ends
Flange Face Design: plain all ends
Special Features: hinge pin material nickel-copper alloy; bolted bonnet
Material: copper alloy 836 body
Material: copper alloy 836 flow control device
Material: nickel alloy seat
Material Document And Classification: astm b61 or b62 assn std single material response body
Material Document And Classification: astm b61 or b62 assn std single material response flow control device
Material Document And Classification: qq-n-233,comp b fed spec single material response seat
Media For Which Designed: steam 1st response
Media For Which Designed: water-oil-gas 2nd response
Style Designator: straight thru flanged ends
Supplementary Features: swing type
Nondefinitive Spec/Std Data: 8 in size and a group and 3 type and a style and 3 trim and 150 class

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-01-272-5504	No Name Available	07/01/2002
4820-01-272-5647	No Name Available	04/01/1995
4820-01-273-3325	No Name Available	12/01/1998

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
8668 ITEM 4 8IN	Check Valve
8668 ITEM B15SW-8IN	Check Valve
8668-8-14	Check Valve
8668-8-4	Check Valve
B-1620-E 8IN	Check Valve
B-1620-E-8IN C1D 882039137	Check Valve
B-1620-E-8IN CID 882039137	Check Valve
B15SW 8IN	Check Valve
B15SW-8IN 8668	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-148-0087?

The FSCG of the NSN 4820-00-148-0087 is 4820

Does the NSN 4820-00-148-0087 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-00-148-0087 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 4820-00-148-0087 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-148-0087 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 4820-00-148-0087 was assigned to the Federal Catalog?

It was assigned 54 years ago, on Wed, Oct 6, 1971