Model: R4438

Safety Relief Valve

Properties:

Pipe Size Accommodated

0.375 inches 1st end

Thread Direction

Right-hand 1st end

Flow Control Device

Diaphragm

Connection Style

G46b plain (pipe) 1st end

Connection Style

Plain (pipe) 1st end

Valve Operation Method

Air

Connection Type

Threaded external pipe 1st end

Features Provided

Pressure tight outlet side

Thready Qty Per Inch (tpi)

18 1st end

Maximum Operating Pressure

0.250 pounds per square inch single response

Thread Size

0.375 inches 1st end

Material

Steel body

Material

Steel seat

Media For Which Designed

Air single response

Style Designator

Straight thru

Thread Series Designator

Npt 1st end

NSN

4820-00-622-0166

Part Number

R4438

Description

Valve,safety Relief

CAGE

51501

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 R4438 NSN 4820-00-622-0166

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