TA770-20-20-R

View detailed technical data, stock status, and sourcing information for: TA770-20-20-R
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-420-3992

Item Name Code

10958

Assigment Date

10/16/1995 (30 years ago)

A valve consisting of a single deadweight loaded disk, or two deadweight loaded disks each with a seperate seat. It is specifically designed for the relief of small pressure and vacuum conditions within a tank or other container to or from the atmosphere. The center of a single deadweight loaded disk may contain a spring loaded disk forming an additional seat or aperture. It may be spring loaded and/or equipped with a manual unloader on either the pressure or vacuum side. Exclude valve, vacuum breaking.

external seat for gasket seal first end style designator, single connection straight thru body style, threaded internal pipe first end connection type, 2.000 inches first end nominal pipe size accommodated, 3.5 pounds per square inch maximum operating pressure

Product Characteristics

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

Maximum Operating Pressure: 3.5 pounds per square inch
Body Style: single connection straight thru
First End Connection Type: threaded internal pipe
First End Style Designator: external seat for gasket seal
First End Nominal Pipe Size Accommodated: 2.000 inches
First End Thread Direction: right-hand
Flow Control Device: disk, flat
End Connection Quantity: 1
Valve Venting Design Type: atmospheric
Valve Relief Design Type: pressure and vacuum
First End Thread Series Designator: uns
First End Nominal Thread Size: 2.000 inches
Material: aluminum body

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
TA770-20-20-R	Gaseou Pressure Equalizing Valve

FAQs

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

What is the FSCG of the NSN 4820-01-420-3992?

The FSCG of the NSN 4820-01-420-3992 is 4820

Does the NSN 4820-01-420-3992 have a Schedule B code assigned?

Yes, the Schedule B code is 8481809050

Does NSN 4820-01-420-3992 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 4820-01-420-3992 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-420-3992 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 4820-01-420-3992 was assigned to the Federal Catalog?

It was assigned 30 years ago, on Mon, Oct 16, 1995