Model: B2858

Safety Relief Valve

Special Features:

Pressure tight outlet side

Properties:

Pipe Size Accommodated

0.250 inches all ends

Thread Direction

Right-hand all ends

Flow Control Device

Poppet

Disk Loading Method

Spring

Connection Style

G46b plain (pipe) all ends

Connection Style

Plain (pipe) all ends

Valve Operation Method

Automatic

Connection Type

Threaded external pipe all ends

Thready Qty Per Inch (tpi)

18 all ends

Adjustable Pressure Range

+7.0/+10.0 pounds per square inch

Thread Size

0.250 inches all ends

Material

Copper alloy seat

Material

Copper alloy body

Style Designator

Straight thru

Thread Series Designator

Npt all ends

Reference Number Differentiating Characteristics

Pressure tight outlet side as differentiated by free from mercury contaminat

NSN

4820-00-620-8123

Part Number

B2858

Description

Valve,safety Relief

CAGE

01343

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 B2858 NSN 4820-00-620-8123

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:

0.1000lbs

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