Model: 1771

Safety Relief Valve

Properties:

Pipe Size Accommodated

1.500 inches 2nd end

Pipe Size Accommodated

2.000 inches 1st end

Thread Direction

Right-hand 2nd end

Thread Direction

Right-hand 1st end

Flow Control Device

Disk

Bonnet Type

Inside spring

Bonnet Attachment Method

Integral

Disk Loading Method

Spring

Connection Style

G9 plain, optional en (pipe) 1st end

Connection Style

G9 plain, optional en (pipe) 2nd end

Connection Type

Threaded internal pipe 1st end

Connection Type

Threaded internal pipe 2nd end

Features Provided

Bonnet packing and pressure tight outlet side

Thready Qty Per Inch (tpi)

11-1/2 1st end

Thready Qty Per Inch (tpi)

11-1/2 2nd end

Maximum Operating Pressure

1300.0 pounds per square inch single response

Thread Size

1.500 inches 2nd end

Thread Size

2.000 inches 1st end

Opening Pressure Setting

750.0 pounds per square inch

Material

Copper alloy

Thread Series Designator

Npt 2nd end

Thread Series Designator

Npt 1st end

NSN

4820-00-956-6181

Part Number

1771

Description

Valve,safety Relief

CAGE

37239

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 1771 NSN 4820-00-956-6181

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:

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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