NSN 4820-00-059-4678

Safety Relief Valve

DEMIL

Shelf Life

UOM

NIIN

Demil:

Shelf Life:

N/A

UOM:

NIIN:

000594678

Pricing & Availability

Submit this form for current pricing and availability quote on part number and/or cross reference parts.

Definition Definition of approved item name (AIN): "VALVE,SAFETY RELIEF"

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes valve (1), relief, pressure and temperature.

4820-00-059-4678 Spec. NSN part characteristics

MRC

Name

Detail

MRC:

ADQU

Flow Control Device

Disk

MRC:

ADSR

Bonnet Type

Exposed spring

MRC:

ADST

Bonnet Attachment Method

Bolted

MRC:

ADSU

Disk Loading Method

Spring

MRC:

ADSY

Valve Discharge Flow Rate

71616.0 pounds per hour

MRC:

AECS

Bolt Hole Quantity

8 2nd end

MRC:

AQLR

Valve Operation Method

Automatic

MRC:

ARKN

Flange Shape

Round with holes 2nd end

MRC:

AWLS

Connection Type

Flange 2nd end

MRC:

CQGM

Maximum Operating Pressure

550.0 pounds per square inch single response

MRC:

CSDC

Opening Pressure Setting

525.0 pounds per square inch

MRC:

CWCD

Outside Diameter

9.000 inches 2nd end

MRC:

CWCQ

Bolt Hole Diameter

1.125 inches 1st end

MRC:

CWCT

Bolt Circle Diameter

7.500 inches 2nd end

MRC:

CWDF

Flange Face Design

Raised straight 2nd end

MRC:

CWDH

Raised Face Height

0.062 inches 2nd end

MRC:

CWDL

Raised Face Diameter

7.312 inches 1st end

MRC:

FEAT

Special Features

Duplex valve, two safety valves mtd in onebody, 1st connection face to centerline distance9.000 in., 2nd connection face to centerlinedistance 6.625 in.

MRC:

MATT

Material

Steel stem

MRC:

STYL

Style Designator

Angle

Cross Reference Parts Part numbers that meet the specification outlined on this page and set by the OEM

Part Number

Cage

RNCC

RNVC

DAC

RNAAC

Status

MSDS

SADC

Part Number:

1426DUPLEX

Cage Code:

16497

RNCC:

RNVC:

DAC:

RNAAC:

Status:

MSDS:

SADC:

Indicates a design/source control reference item

Inidicates part number has been superseded

Identification Item Identification Guide (IIG) and Item Name Code (INC)

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05488

FIIG:

A046B0

Concept No.:

App. Key:

Cond. Code:

Status:

Material & Special Handling Hazmat, Precious Metals, Criticality, Enviroment, and ESD

HMIC

PMIC

ESD

ENAC

ADPE

CRITL

HMIC:

PMIC:

ESD:

ADPE:

CRITL:

Hazmat (HMIC) N

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

Precious Metals (PMIC) U

Precious metal content is unknown

Criticality X

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

Identification Codes

HMIC: Hazardous Material Indicator Code. Identifies a hazardous item.

PMIC: Precious Metal Indicator Code. Identifies items that have precious metals as part of their content. precious metals are those metals generally considered to be uncommon, highly valuable, and relatively superior in certain properties such as resistance to corrosion and electrical conductivity.

ESD: Electrostatic Discharge. Indicates if an item is susceptible to electrostatic discharge or electromagnetic interference damage. electrostatic discharge damage occurs when an accumulation of static electricity generated by the relative motion or separation of materials is released to another item by direct contact. electromagnetic interference damage occurs when an item comes into proximity with an electrostatic or magnetic field.

ENAC: Enviromental Attribute Code. Identifies items with environmentally preferred characteristics.

CRITL: Criticality Indicator Code. Indicates an item is technically critical by tolerance, fit, application, nuclear hardness properties, or other characteristics.