D559T-2M-18

View detailed technical data, stock status, and sourcing information for: D559T-2M-18
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-149-1699

Item Name Code

05488

Assigment Date

03/15/1983 (43 years ago)

250.0 fahrenheit single response maximum operating temp, poppet flow control device, automatic valve operation method, plain (pipe) 1st end connection style, right-hand 1st end 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 1st end
Flow Control Device: poppet
Maximum Operating Temp: 250.0 fahrenheit single response
Connection Style: plain (pipe) 1st end
Valve Operation Method: automatic
Connection Type: threaded external pipe 1st end
Adjustable Pressure Range: +5.0 to 150.0 pounds per square inch
Maximum Operating Pressure: 200.0 pounds per square inch single response
Nominal Thread Size: 0.250 inches 1st end
Opening Pressure Setting: 18.0 pounds per square inch
Material: rubber butadiene-acrylonitrile class nbr seat
Material: steel comp 303 body
Media For Which Designed: acetylene 2nd response
Media For Which Designed: air 1st response
Media For Which Designed: ammonia, gaseous 3rd response
Media For Which Designed: hydrogen 5th response
Media For Which Designed: refrigerant 12 4th response
Style Designator: straight thru
Thread Series Designator: npt all ends
Furnished Items And Quantity: 1 deflector cap

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
D559T-2M-18	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-149-1699?

The FSCG of the NSN 4820-01-149-1699 is 4820

Does the NSN 4820-01-149-1699 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-149-1699 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 4820-01-149-1699 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-149-1699 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 4820-01-149-1699 was assigned to the Federal Catalog?

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