1990C-1-XSA1 .75IPS SET 660PSI

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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-367-4773

Item Name Code

05488

Assigment Date

11/13/1992 (33 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.

2000.0 fahrenheit single response maximum operating temp, 0.750 inches 2nd end nominal pipe size accommodated, disk flow control device, spring disk loading method, 1.000 inches 1st end nominal pipe size accommodated

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Nominal Pipe Size Accommodated: 0.750 inches 2nd end
Nominal Pipe Size Accommodated: 1.000 inches 1st end
Flow Control Device: disk
Disk Loading Method: spring
Maximum Operating Temp: 2000.0 fahrenheit single response
Minimum Operating Temp: -20.0 fahrenheit
Connection Style: socket all ends
Valve Operation Method: automatic
Connection Type: unthreaded internal pipe all ends
Maximum Operating Pressure: 2000.0 pounds per square inch single response
Opening Pressure Setting: 660.0 pounds per square inch
Special Features: carbon steel(phosphated)spring;orifice area,0.110 sq.in.
Material: steel comp 316 body
Material: steel comp 316 flow control device
Material: steel comp 410 stem
Material Document And Classification: astm a276 cond t assn std single material response stem
Material Document And Classification: astm a479 assn std single material response body
Material Document And Classification: astm a479 assn std single material response flow control device
Media For Which Designed: air 1st response
Media For Which Designed: steam 2nd response
Style Designator: angle
Furnished Items And Quantity: 1 lever

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
1990C-1-XSA1 .75IPS SET 660PSI	Safety Relief Valve
3/4 19110MC-2-CC-MS-31-SW-SW-LA	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-367-4773?

The FSCG of the NSN 4820-01-367-4773 is 4820

Does the NSN 4820-01-367-4773 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-367-4773 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 4820-01-367-4773 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-367-4773 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 4820-01-367-4773 was assigned to the Federal Catalog?

It was assigned 33 years ago, on Fri, Nov 13, 1992