640B-1-18-2

Safety Relief Valve

NSN 4820-00-559-4399

DEMIL

Shelf Life

UOM

NIIN

Demil:

Shelf Life:

N/A

UOM:

1 EA

NIIN:

005594399

Technical Specifications of NSN

Thread Class:

3b all ends

Thread Direction:

Right-hand all ends

Flow Control Device:

Poppet

Disk Loading Method:

Spring

Maximum Operating Temp:

225.0 degrees fahrenheit single response

Connection Style:

G4 gasket sea (boss) all ends

Connection Style:

Gasket sea (boss) all ends

Valve Operation Method:

Automatic

Connection Type:

Threaded internal boss all ends

Adjustable Pressure Range:

+1500.0/+2750.0 pounds per square inch

Maximum Operating Pressure:

3600.0 pounds per square inch single response

Thread Size:

0.750 inches all ends

Material:

Plastic polytetrafluoroethylene seat

Material:

Steel comp 303 body

Material:

Steel comp 416 flow control device

Media For Which Designed:

Hydraulic fluid, petroleum base single response

Surface Treatment:

Passivate

Style Designator:

Angle

Thread Series Designator:

Unf all ends

NSN:

4820-00-559-4399

Item Name:

Velocity Fuse

Cage Code:

86768

Other Related Parts

Part Number

Cage

RNCC

RNVC

RNAAC

Status

MSDS

SADC

Part Number:

516262-1

Cage Code:

80020

RNCC:

RNVC:

RNAAC:

Status:

MSDS:

SADC:

Part Number:

640B-11-8-2

Cage Code:

09990

RNCC:

RNVC:

RNAAC:

Status:

MSDS:

SADC:

Part Number:

640B-1-4-2

Cage Code:

86768

RNCC:

RNVC:

RNAAC:

Status:

MSDS:

SADC:

Part Identification

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05488

FIIG:

A046B0

Concept No.:

App. Key:

Cond. Code:

Status:

Part Materials

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:

0.8000lbs

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:

127220

UFC:

64490

LTL:

77.5

LCL:

WCC:

594

TCC:

SHC:

ACC:

Construction Materials

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Pricing & Availability

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Definition Definition of approved item name (AIN): "Velocity Fuse"

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.