NMP1521 0PTI0N

View detailed technical data, stock status, and sourcing information for: NMP1521 0PTI0N
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-226-3246

Item Name Code

05488

Assigment Date

02/15/1986 (40 years ago)

A valve that controls flow by a circular disk, or a pair of semicircular disks, attached to a common spindle or lever turning on a diametral axis.

spring disk loading method, union bonnet attachment method, disk flow control device, inside spring bonnet type, 4 all ends bolt hole quantity

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: union
Disk Loading Method: spring
Bolt Hole Quantity: 4 all ends
Valve Operation Method: automatic
Flange Shape: round with holes all ends
Connection Type: flange all ends
Valve Size: 1.000 inches
Adjustable Pressure Range: +30.0 to 45.0 pounds per square inch
Maximum Operating Pressure: 150.0 pounds per square inch single response
Nominal Outside Diameter: 3.500 inches 2nd end
Nominal Outside Diameter: 4.250 inches 1st end
Nominal Thickness: 0.438 inches all ends
First Connection Face To Centerline Distance: 3.250 inches
Bolt Hole Nominal Diameter: 0.625 inches all ends
Second Connection Face To Centerline Distance: 3.312 inches
Bolt Circle Nominal Diameter: 2.375 inches 2nd end
Bolt Circle Nominal Diameter: 3.125 inches 1st end
Flange Face Design: raised straight all ends
Raised Face Nominal Height: 0.062 inches all ends
Raised Face Nominal Diameter: 1.375 inches 2nd end
Raised Face Nominal Diameter: 2.000 inches 1st end
Material: steel body
Material: steel corrosion resisting flow control device
Material: steel corrosion resisting seat
Material: steel corrosion resisting stem
Media For Which Designed: steam single response
Style Designator: angle flanged 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
MODEL DX-10C OPT	Safety Relief Valve
MODEL DX-10C OPTION 1 30T45PSI	Safety Relief Valve
NMP1521 0PTI0N	Safety Relief Valve
NMP1521 OPTION 1	Safety Relief Valve
NMP1521 OPTION 1 30T45PSI	Safety Relief Valve
UCKCNN02CCCE	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-226-3246?

The FSCG of the NSN 4820-01-226-3246 is 4820

Does the NSN 4820-01-226-3246 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-226-3246 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 4820-01-226-3246 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-226-3246 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 4820-01-226-3246 was assigned to the Federal Catalog?

It was assigned 40 years ago, on Sat, Feb 15, 1986