Model: D661-2531

Safety Relief Valve

Properties:

Thread Direction

Right-hand 1st end

Flow Control Device

Disk

Disk Loading Method

Spring

Maximum Operating Temp

300.0 degrees fahrenheit single response

Connection Style

G9 plain, optional en (pipe) 1st end

Valve Operation Method

Automatic or manual

Connection Type

Threaded internal pipe 1st end

Maximum Operating Pressure

6500.0 pounds per square inch single response

Thread Size

0.750 inches 1st end

Opening Pressure Setting

3300.0 pounds per square inch

Material

Copper alloy body

Thread Series Designator

Npt 1st end

NSN

4820-01-135-5188

Part Number

D661-2531

Description

Valve,safety Relief

CAGE

96101

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 D661-2531 NSN 4820-01-135-5188

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:

77.5

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