Model: 559A-4DB-3.3

Safety Relief Valve

Properties:

Thread Class

3a 1st end

Thread Class

3b 2nd end

Thread Direction

Right-hand all ends

Flow Control Device

Poppet

Maximum Operating Temp

275.0 degrees fahrenheit single response

Minimum Operating Temp

-65.0 degrees fahrenheit

Connection Style

G4 gasket sea (boss) 2nd end

Connection Style

G50 external seat for gasket seal (boss) 1st end

Valve Operation Method

Automatic

Connection Type

Threaded external boss 1st end

Connection Type

Threaded internal boss 2nd end

Thready Qty Per Inch (tpi)

20 all ends

Thread Size

0.438 inches all ends

Opening Pressure Setting

3.3 pounds per square inch

Material

Aluminum alloy 2024 body

Thread Series Designator

Unj all ends

NSN

4820-01-059-3527

Part Number

559A-4DB-3.3

Description

Valve,safety Relief

CAGE

91816

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 559A-4DB-3.3 NSN 4820-01-059-3527

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

127220

UFC:

64490

LTL:

77.5

LCL:

77.5

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