Part Information
Items are being coded as critical to insure source inspection will be performed at the point of manufacture, prior to material receipt by the us navy or other dod components. These items are piece parts or end items in support of vital military hardware necessary to sustain the successful mission of the ships, submarines, and shore stations of the us navy. Critical features including, but not limited to, dimensions, tolerances/clearances, electronic characteristics, and metallurgical properties will bespecified for government q ar (quality assurance representatives) to insure the highest possible degree of quality and reliability of these parts being delivered under navicp contracts

NSN

National Stock Number:

4820-00-163-5161 4820001635161

TXT

Description:

Safety Relief Valve

INC

Item Name Code:

05488

MRC:

The part that controls the flow through the item.ADQU

Flow Control Device:

Disk

MRC:

Indicates the type of housing on the item that accommodates the stem packing or spring.ADSR

Bonnet Type:

Exposed spring

MRC:

The means by which the bonnet is attached to the item.ADST

Bonnet Attachment Method:

Bolted

MRC:

The means of closing the item when inlet pressure decreases.ADSU

Disk Loading Method:

Spring

MRC:

The rated valve discharge capacity per unit of time.ADSY

Valve Discharge Flow Rate:

43200.0 pounds per hour

MRC:

Indicates the type of renewable seating ring in the item.ADZH

Renewable Seat Ring Type:

Threaded

MRC:

The number of bolt holes provided on the item.AECS

Bolt Hole Quantity:

8 1st end

MRC:

The number of bolt holes provided on the item.AECS

Bolt Hole Quantity:

8 2nd end

MRC:

The means used to control the operation of the valve.AQLR

Valve Operation Method:

Automatic or manual

MRC:

The physical configuration of the flange.ARKN

Flange Shape:

Round with holes 1st end

MRC:

The physical configuration of the flange.ARKN

Flange Shape:

Round with holes 2nd end

MRC:

Those features,not otherwise specified,which may be required for proper functioning of the item.CBBL

Features Provided:

Pressure tight outlet side

MRC:

Designates the size of the valve.CCFG

Valve Size:

2.500 inches

MRC:

The master requirement codes of those requirements which are technically critical by reason of tolerance,fit,performance,or other characteristics which affect identification of the item.CRTL

Criticality Code Justification:

Feat

MRC:

The predetermined pressure at which the item is calibrated to open.CSDC

Opening Pressure Setting:

710.0 pounds per square inch

MRC:

The nominal length of a straight line which passes through the center of an item,and terminates at the outside circumference.CWCD

Outside Diameter:

7.500 inches 1st end

MRC:

The nominal length of a straight line which passes through the center of an item,and terminates at the outside circumference.CWCD

Outside Diameter:

9.000 inches 2nd end

MRC:

A nominal measurement of the smallest dimension of an item,in distinction from length or width.CWCK

Thickness:

1.188 inches 2nd end

MRC:

A nominal measurement of the smallest dimension of an item,in distinction from length or width.CWCK

Thickness:

1.250 inches 1st end

MRC:

The nominal length of a straight line which passes through the center of the bolt hole,and terminates at the circumference.CWCQ

Bolt Hole Diameter:

0.875 inches 1st end

MRC:

The nominal length of a straight line which passes through the center of the bolt hole,and terminates at the circumference.CWCQ

Bolt Hole Diameter:

0.875 inches 2nd end

MRC:

The nominal length of a straight line which passes through the center of the bolt circle,and terminates at the circumference.CWCT

Bolt Circle Diameter:

5.875 inches 1st end

MRC:

The nominal length of a straight line which passes through the center of the bolt circle,and terminates at the circumference.CWCT

Bolt Circle Diameter:

7.250 inches 2nd end

MRC:

The design of the flange face.CWDF

Flange Face Design:

Raised straight 2nd end

MRC:

The design of the flange face.CWDF

Flange Face Design:

Recessed straight 1st end

MRC:

A nominal measurement from the bottom to the top surface of a raised face,in distinction from depth.CWDH

Raised Face Height:

0.062 inches 2nd end

MRC:

The nominal length of a straight line which passes through the center of a raised face,and terminates at the circumference.CWDL

Raised Face Diameter:

5.500 inches 2nd end

MRC:

The nominal length of a straight line which passes through the center of the recess,and terminates at the circumference.CWDP

Recess Diameter:

6.875 inches 1st end

MRC:

A nominal measurement between specified points on the recess,in distinction from height.CWDS

Recess Depth:

0.062 inches 1st end

MRC:

The style designation indicating the configuration that most nearly corresponds to the appearance of the item.STYL

Style Designator:

Err-090

MRC:

The style designation indicating the configuration that most nearly corresponds to the appearance of the item.STYL

Style Designator:

Angle flanged ends

MRC:

A feature of the item of supply which must be specifically recorded when the reference number covers a range of items.ZZZY

Reference Number Differentiating Characteristics:

As differentiated by the valve discharge flow rate requirement

Code	Definition
FN	Factory New. Parts manufactured by then OEM and includes manufacturer certification.
NE	New. Parts manufactured by the OEM. May include manufacturer certification or company certification.
NS	New Surplus. New material item purchased from excess inventory.
OH	Overhauled. Product has been rebuilt and tested in accordance with the manufacturer's specifications by a repair shop (MRO).
SV	Serviceable product.
AR	As Removed. Product removed from aircraft or platform with no guarentee on the functionality of the part.
RP	Repairable. Product can be repaired by a MRO and be given a FAA 8130 or EASA Form 1 certification.

Part Number A42437

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