Model: 68A4C578-1

Safety Relief Valve

Properties:

Thread Class

2b 2nd end

Thread Class

3a 1st end

Thread Direction

Right-hand 2nd end

Thread Direction

Right-hand 1st end

Flow Control Device

Disk

Disk Loading Method

Spring

Valve Discharge Flow Rate

45.0 gallons per minute

End Application

Grummin aerospace a10 aircraft

Connection Style

G42 flared (tube) 1st end

Connection Style

G4 gasket sea (boss) 2nd end

Valve Operation Method

Automatic

Connection Type

Threaded external tube 1st end

Connection Type

Threaded internal boss 2nd end

Features Provided

Pressure tight outlet side

Thready Qty Per Inch (tpi)

12 1st end

Thready Qty Per Inch (tpi)

12 2nd end

Maximum Operating Pressure

1000.0 pounds per square inch single response

Thread Size

1.875 inches 1st end

Thread Size

1.875 inches 2nd end

Seat Angle

37.0 degrees 1st end

Opening Pressure Setting

50.0 pounds per square inch

Outside Diameter Tube Accommodated

1.500 inches 1st end

Material

Steel

Thread Series Designator

Un 1st end

Thread Series Designator

Un 2nd end

NSN

4820-00-955-5968

Part Number

68A4C578-1

Description

Valve,safety Relief

CAGE

30003

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 68A4C578-1 NSN 4820-00-955-5968

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:

1.8000lbs

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:

594

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