Model: B-7866-4

Safety Relief Valve

Properties:

Thread Class

2b 2nd end

Thread Class

2b 1st end

Thread Direction

Right-hand 2nd end

Thread Direction

Right-hand 1st end

Flow Control Device

Disk

Maximum Operating Temp

225.0 degrees fahrenheit single response

Connection Style

G4 gasket sea (boss) 1st end

Connection Style

G4 gasket sea (boss) 2nd end

Valve Operation Method

Automatic

Connection Type

Threaded internal boss 1st end

Connection Type

Threaded internal boss 2nd end

Adjustable Pressure Range

+500.0/+4000.0 pounds per square inch

Maximum Operating Pressure

4000.0 pounds per square inch single response

Thread Size

0.875 inches 2nd end

Thread Size

1.062 inches 1st end

Opening Pressure Setting

1500.0 pounds per square inch

Material

Iron cast body

Material

Steel seat

Thread Series Designator

Unf 1st end

Thread Series Designator

Unf 2nd end

NSN

4820-01-118-7461

Part Number

B-7866-4

Description

Valve,safety Relief

CAGE

46717

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 B-7866-4 NSN 4820-01-118-7461

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

127220

UFC:

64490

LTL:

77.5

LCL:

WCC:

671

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