Model: 1A057-1

Safety Relief Valve

Special Features:

Reverse flow

Properties:

Thread Class

3b 1st end

Thread Direction

Right-hand 1st end

Bonnet Type

Inside spring

Bonnet Attachment Method

Pressure seal, ring type

Disk Loading Method

Spring

Valve Discharge Flow Rate

1.0 gallons per minute

Connection Style

G4 gasket sea (boss) 1st end

Connection Style

Gasket sea (boss) 1st end

Valve Operation Method

Manual

Connection Type

Threaded internal boss 1st end

Features Provided

Bonnet packing and pressure tight outlet side

Thready Qty Per Inch (tpi)

20 1st end

Adjustable Pressure Range

+3000.0/+4000.0 pounds per square inch

Maximum Operating Pressure

4000.0 pounds per square inch single response

Thread Size

0.437 inches 1st end

Opening Pressure Setting

4000.0 pounds per square inch

Media For Which Designed

Hydraulic fluid, phosphate-ester base single response

Surface Treatment

Anodize

Surface Treatment Specification

Mil-a-8625, type 2 military specification single treatment response

Thread Series Designator

Unf 1st end

NSN

4820-00-073-1775

Part Number

1A057-1

Description

Valve,safety Relief

CAGE

98391

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 1A057-1 NSN 4820-00-073-1775

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:

0.6000lbs

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:

576

TCC:

SHC:

ACC:

Construction Materials

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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