Model: 640B-3-12-28

Safety Relief Valve

Special Features:

Size 12 ist end connections; buna-n o-ring; polytetrafluoroethylene seat

Properties:

Flow Control Device

Poppet

Disk Loading Method

Spring

End Application

Nimitz class cvn

Connection Style

G9 plain, optional en (pipe) all ends

Valve Operation Method

Automatic

Connection Type

Threaded internal tube all ends

Adjustable Pressure Range

+40.0 to 125.0 pounds per square inch

Maximum Operating Pressure

3600.0 pounds per square inch single response

Opening Pressure Setting

90.0 pounds per square inch

Material

Stainless steel body

Style Designator

C1 angle

NSN

4820-01-420-3868

Part Number

640B-3-12-28

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 640B-3-12-28 NSN 4820-01-420-3868

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:

127220

UFC:

64490

LTL:

77.5

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