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4820-01-281-7370

Safety Relief Valve

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Official Item Classification

Name
Safety Relief Valve
(NSN) National Stock Number
4820-01-281-7370
(FSG) Federal Supply Group
48 Valves
(FSC) Federal Supply Classification
4820 Nonpowered Valves
(INC) Item Name Code
05488
(FIIG) Federal Item Identification Guide
A046B0
Date
06/30/1988 (38 years ago)

spring disk loading method, 4 all ends bolt hole quantity, disk flow control device, union bonnet attachment method, inside spring bonnet type

Specs & Compatibility

Flow Control Device

disk

Bonnet Type

inside spring

Bonnet Attachment Method

union

Disk Loading Method

spring

Bolt Hole Quantity

4 all ends

End Item Identification

wasp class lhd

Valve Operation Method

automatic

Flange Shape

round with holes all ends

Connection Type

flange all ends

Valve Size

2.000 inches

Adjustable Pressure Range

+30.0 to 42.0 pounds per square inch

Nominal Outside Diameter

4.250 inches 2nd end

Nominal Outside Diameter

6.000 inches 1st end

Nominal Thickness

0.438 inches 2nd end

Nominal Thickness

0.562 inches 1st end

First Connection Face To Centerline Distance

4.500 inches

Bolt Hole Nominal Diameter

0.625 inches 2nd end

Bolt Hole Nominal Diameter

0.750 inches 1st end

Second Connection Face To Centerline Distance

4.125 inches

Bolt Circle Nominal Diameter

3.125 inches 2nd end

Bolt Circle Nominal Diameter

4.750 inches 1st end

Flange Face Design

raised straight all ends

Raised Face Nominal Height

0.062 inches all ends

Raised Face Nominal Diameter

2.000 inches 2nd end

Raised Face Nominal Diameter

3.625 inches 1st end

Material

steel body

Material

steel corrosion resisting flow control device

Material

steel corrosion resisting seat

Material

steel corrosion resisting stem

Style Designator

angle flanged ends

Specification/Standard Data

81349-mil-v-20065d government specification

Nondefinitive Spec/Std Data

1 type and d composition

Regulatory Compliance

Precious Metals Indicator
A

Item does not contain precious metal.

Criticality Code
X

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator
N

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Pseudo Item Name Code

0005488

Related Hardware Products

Part Number Description
DS-10D 30T42PSI Safety Relief Valve
MIL-V-20065D Safety Relief Valve
NMP-1551 ITEM DS Safety Relief Valve
NMP-1551 ITEM DS-10D 30T42PSI Safety Relief Valve
NMP155101S0030 Safety Relief Valve

Frequently Asked Questions

What is the FSCG of the NSN 4820-01-281-7370?
The FSCG of the NSN 4820-01-281-7370 is 4820
Does the NSN 4820-01-281-7370 have a Schedule B code assigned?
Yes, the Schedule B code is 8481400000
Does NSN 4820-01-281-7370 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 4820-01-281-7370 contain precious materials?
Item does not contain precious metal.
Does NSN 4820-01-281-7370 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 4820-01-281-7370 was assigned to the Federal Catalog?
It was assigned 38 years ago, on Thu, Jun 30, 1988