Model: 9957

Safety Relief Valve

Properties:

Pipe Size Accommodated

2.000 inches 2nd end

Flow Control Device

Disk

Bolt Hole Quantity

4 1st end

End Application

Propulsion systems

Valve Operation Method

Automatic

Flange Shape

Round with holes 1st end

Connection Type

Flange 1st end

Connection Type

Unthreaded internal pipe 2nd end

Adjustable Pressure Range

+20.0/+24.0 pounds per square inch

Outside Diameter

6.000 inches 1st end

Thickness

0.500 inches 1st end

Bolt Hole Diameter

0.750 inches 1st end

Bolt Circle Diameter

4.750 inches 1st end

Flange Face Design

Plain 1st end

Material

Copper alloy body

Material

Steel comp 316 stem

NSN

4820-01-255-8899

Part Number

9957

Description

Valve,safety Relief

CAGE

15187

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 9957 NSN 4820-01-255-8899

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:

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:

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