NMP-1145 SPRING NO 1799

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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-135-2457

Item Name Code

05488

Assigment Date

07/20/1982 (44 years ago)

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes:valve (1), relief, pressure and temperature.

disk flow control device, spring disk loading method, inside spring bonnet type, union bonnet attachment method, 1650.0 gallons per minute valve discharge flow rate

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
Valve Discharge Flow Rate: 1650.0 gallons per minute
Bolt Hole Quantity: 12 all ends
Maximum Operating Temp: 150.0 fahrenheit single response
Valve Operation Method: automatic
Flange Shape: round with holes all ends
Connection Type: flange all ends
Valve Size: 6.000 inches
Adjustable Pressure Range: +68.0 to 77.0 pounds per square inch
Maximum Operating Pressure: 150.0 pounds per square inch single response
Opening Pressure Setting: 75.0 pounds per square inch
Nominal Outside Diameter: 10.125 inches all ends
Nominal Thickness: 0.562 inches all ends
First Connection Face To Centerline Distance: 8.938 inches
Bolt Hole Nominal Diameter: 0.688 inches all ends
Second Connection Face To Centerline Distance: 8.625 inches
Bolt Circle Nominal Diameter: 8.875 inches all ends
Flange Face Design: plain all ends
Material: copper alloy body
Material: nickel alloy flow control device
Material: nickel alloy seat
Material: nickel alloy stem
Media For Which Designed: air 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
46H0-209/M5 6X6	Safety Relief Valve
CD SHEET 601	Safety Relief Valve
CD SHEET 601 ITEM 1	Safety Relief Valve
NMP 1145 68 TO 77 PSI	Safety Relief Valve
NMP-1145	Safety Relief Valve
NMP-1145 SPRING NO 1799	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-135-2457?

The FSCG of the NSN 4820-01-135-2457 is 4820

Does the NSN 4820-01-135-2457 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-135-2457 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 4820-01-135-2457 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-135-2457 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 4820-01-135-2457 was assigned to the Federal Catalog?

It was assigned 44 years ago, on Tue, Jul 20, 1982