Model: D559B-2M-D-8

Safety Relief Valve

Special Features:

Adjustable poppet valve, zero leakage, out to atmoshere; temperature range determined my seal material

Properties:

Thread Direction

Right-hand 1st end

Flow Control Device

Poppet

Disk Loading Method

Spring

Maximum Operating Temp

275.0 degrees fahrenheit single response

Minimum Operating Temp

-40.0 degrees fahrenheit

End Application

New construction lhd8

Connection Style

G46b plain (pipe) 1st end

Valve Operation Method

Automatic

Connection Type

Threaded external pipe 1st end

Adjustable Pressure Range

+5.6/+13.9 pounds per square inch

Maximum Operating Pressure

200.0 pounds per square inch single response

Thread Size

0.250 inches 1st end

Opening Pressure Setting

8.0 pounds per square inch

Part Name Assigned By Controlling Agency

Adjustable popoff relief valve

Material

Copper alloy body

Media For Which Designed

Air single response

Thread Series Designator

Npt 1st end

Furnished Items And Quantity

1 deflector cap

NSN

4820-01-551-1121

Part Number

D559B-2M-D-8

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 D559B-2M-D-8 NSN 4820-01-551-1121

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:

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