Model: 4P138-3

Safety Relief Valve

Properties:

Thread Class

3a 1st end

Thread Direction

Right-hand 1st end

Flow Control Device

Ball

Disk Loading Method

Spring

Renewable Seat Ring Type

Pressed-in

Connection Style

G42 flared (tube) 1st end

Connection Style

Flared (tube) 1st end

Valve Operation Method

Automatic

Connection Type

Threaded external tube 1st end

Features Provided

Pressure tight outlet side

Thready Qty Per Inch (tpi)

20 1st end

Adjustable Pressure Range

+100.0/+120.0 pounds per square inch

Adjustable Pressure Range

+100.0 to 120.0 pounds per square inch

Thread Size

0.437 inches 1st end

Seat Angle

37.0 degrees 1st end

Outside Diameter Tube Accommodated

0.250 inches 1st end

Material

Steel comp 303 body

Material

Steel comp 303 seat

Material Specification

Qq-s-764 federal specification single material response body

Material Specification

Qq-s-764 federal specification single material response seat

Thread Series Designator

Unf 1st end

NSN

4820-00-139-0381

Part Number

4P138-3

Description

Valve,safety Relief

CAGE

82829

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 4P138-3 NSN 4820-00-139-0381

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:

0.2000lbs

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:

051080

UFC:

29300

LTL:

RATING VARIABLE

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