D559T-8D-55

View detailed technical data, stock status, and sourcing information for: D559T-8D-55
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-501-7806

Item Name Code

05488

Assigment Date

10/16/2002 (23 years ago)

A valve designed to automatically maintain within close limits a predetermined outlet pressure which may be adjustable within a specified range regardless of the higher fluctuating or constant inlet pressure. It is designed for use with compressed gas(es) and various liquids and may include gauges. It may be inline or cartridge (manifold) design. Excludes:regulator, pressure, medical gas administration apparatus; regulator, oxygen, barometric continuous flow; regulator, oxygen demand; regulator, oxygen diluter demand; and valve(1), fluid pressure regulating, aircraft.

right-hand all ends thread direction, pressed-in renewable seat ring type, poppet flow control device, spring disk loading method, 2a all ends thread class

Product Characteristics

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

Thread Class: 2a all ends
Thread Direction: right-hand all ends
Flow Control Device: poppet
Disk Loading Method: spring
Renewable Seat Ring Type: pressed-in
Maximum Operating Temp: 250.0 fahrenheit single response
Minimum Operating Temp: -40.0 fahrenheit
Connection Style: external seat for gasket seal (boss) all ends
Valve Operation Method: automatic
Connection Type: threaded external boss all ends
Nominal Thread Size: 0.750 inches all ends
Opening Pressure Setting: 55.0 pounds per square inch
Special Features: seal material is buna-n syn rubber
Material: steel corrosion resisting body
Material: steel corrosion resisting overall
Media For Which Designed: steam single response
Style Designator: straight thru w/baffle
Thread Series Designator: unf all 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
3240789	Safety Relief Valve
D559T-8D-55	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-501-7806?

The FSCG of the NSN 4820-01-501-7806 is 4820

Does the NSN 4820-01-501-7806 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-501-7806 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 4820-01-501-7806 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-501-7806 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 4820-01-501-7806 was assigned to the Federal Catalog?

It was assigned 23 years ago, on Wed, Oct 16, 2002