FIGURE 1A-1/2-50PSI

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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-288-7304

Item Name Code

05488

Assigment Date

01/01/1963 (63 years ago)

97.0 cubic feet per minute valve discharge flow rate, spring disk loading method, poppet flow control device, 350.0 fahrenheit single response maximum operating temp, right-hand all ends thread direction

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
Flow Control Device: poppet
Disk Loading Method: spring
Valve Discharge Flow Rate: 97.0 cubic feet per minute
Maximum Operating Temp: 350.0 fahrenheit single response
Connection Style: plain (pipe) all ends
Valve Operation Method: automatic or manual
Connection Type: threaded external pipe all ends
Features Provided: valve stem lock shield
Adjustable Pressure Range: +35.0 to 59.0 pounds per square inch
Maximum Operating Pressure: 250.0 pounds per square inch single response
Nominal Thread Size: 0.500 inches all ends
Opening Pressure Setting: 50.0 pounds per square inch
Special Features: furnished w/manual pressure relief lever
Material: copper alloy overall
Media For Which Designed: air 1st response
Media For Which Designed: gas, natural 2nd response
Style Designator: angle
Thread Series Designator: npt all ends
Furnished Items And Quantity: 1 cap and 1 chain

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-01-217-9822	No Name Available	07/01/1994

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
149-1-2	Safety Relief Valve
1A-1/2IN35T59PSI	Safety Relief Valve
1P460	Safety Relief Valve
FIG 105C1/2 50PSI	Safety Relief Valve
FIGURE 1A-1/2-50PSI	Safety Relief Valve
X1396T3-50	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-288-7304?

The FSCG of the NSN 4820-00-288-7304 is 4820

Does the NSN 4820-00-288-7304 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-288-7304 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 4820-00-288-7304 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-288-7304 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 4820-00-288-7304 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963