Model: 631B-3-1/8-28

Safety Relief Valve

Special Features:

Weapon system essential. Features - clean and package for oxygen service

Properties:

Thread Direction

Right-hand all ends

Flow Control Device

Disk

Disk Loading Method

Spring

End Application

4920-01-176-3674 oxygen test stand ground support equipment for the f/a-18 hornet aircraft

Connection Style

G9 plain, optional en (pipe) all ends

Valve Operation Method

Automatic

Connection Type

Threaded internal pipe all ends

Thread Size

0.125 inches all ends

Criticality Code Justification

Feat

Opening Pressure Setting

110.0 pounds per square inch

Material

Stainless steel body

Thread Series Designator

Npt all ends

NSN

4820-01-345-9972

Part Number

631B-3-1/8-28

Description

Valve,safety Relief

CAGE

09990

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.

Part 631B-3-1/8-28 NSN 4820-01-345-9972

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05488

FIIG:

A046B0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

051080

UFC:

29300

LTL:

RATING VARIABLE

LCL:

WCC:

594

TCC:

SHC:

ACC:

Trailers/Vehicles

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Schedule B and Export

Schedule B: 8481400000
SITC: 74740
End Use: Industrial machines, other
NAICS: 332911
USDA: 1

Freight Class: Safety or relief valves