1201 1/2INCH

View detailed technical data, stock status, and sourcing information for: 1201 1/2INCH
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-147-2818

Item Name Code

05485

Assigment Date

02/15/1983 (43 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, right-hand all ends thread direction, union bonnet attachment method, inside screw bonnet type, 550.0 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.

Thread Direction: right-hand all ends
Flow Control Device: disk
Bonnet Type: inside screw
Bonnet Attachment Method: union
Maximum Operating Temp: 550.0 fahrenheit single response
Connection Style: plain,optional end(pipe) all ends
Valve Operation Method: manual
Connection Type: threaded internal pipe all ends
Features Provided: bonnet packing
Maximum Operating Pressure: 300.0 pounds per square inch 2nd response
Maximum Operating Pressure: 600.0 pounds per square inch 1st response
Nominal Thread Size: 0.500 inches all ends
Material: copper alloy 694 stem
Material: copper alloy 922 body
Material: copper alloy 922 flow control device
Material: plastic polytetrafluoroethylene packing
Material Document And Classification: astm b-371 alloy c69400 assn std single material response stem
Material Document And Classification: astm b-61 assn std single material response body
Material Document And Classification: astm b61(b) assn std single material response flow control device
Media For Which Designed: steam 2nd response
Media For Which Designed: water-oil-gas 1st response
Style Designator: straight thru
Thread Series Designator: npt all ends

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-00-051-8784	No Name Available	08/01/2007

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
0529 1/2IN	Globe Valve
1130 1/2INCH	Globe Valve
1201 1/2INCH	Globe Valve
205 1/2IN	Globe Valve
3205 1/2IN	Globe Valve
3255 1/2 IN	Globe Valve
BP-22871	Globe Valve
BP-22871 PART T275B 1-2IN	Globe Valve
T275B 1-2IN	Globe Valve

FAQs

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

What is the FSCG of the NSN 4820-01-147-2818?

The FSCG of the NSN 4820-01-147-2818 is 4820

Does NSN 4820-01-147-2818 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 4820-01-147-2818 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-147-2818 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 4820-01-147-2818 was assigned to the Federal Catalog?

It was assigned 43 years ago, on Tue, Feb 15, 1983