Model: D661-1259

Safety Relief Valve

Properties:

Pipe Size Accommodated

1.000 inches 2nd end

Pipe Size Accommodated

1.250 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

Threaded

Disk Loading Method

Spring

Renewable Seat Ring Type

Pressed-in

Connection Style

G46b plain (pipe) 2nd end

Connection Style

G9 plain, optional en (pipe) 1st end

Valve Operation Method

Manual

Connection Type

Threaded external pipe 2nd end

Connection Type

Threaded internal pipe 1st end

Features Provided

Valve stem lock shield and bonnet packing and pressure tight outlet side

Thready Qty Per Inch (tpi)

11-1/2 2nd end

Maximum Operating Pressure

25.0 pounds per square inch single response

Thread Size

1.250 inches 1st end

Thread Size

1.000 inches 2nd end

Material

Copper alloy

Thread Series Designator

Npt 2nd end

Thread Series Designator

Npt 1st end

NSN

4820-00-831-7567

Part Number

D661-1259

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 D661-1259 NSN 4820-00-831-7567

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:

127220

UFC:

64490

LTL:

77.5

LCL:

WCC:

576

TCC:

SHC:

ACC:

Construction Materials

Pricing & Availability Check

Submit this form for stock availability and pricing.

How to Order

Ordering from buyaircraftparts.com

If you would like to order this safety relief valve (NSN 4820-00-831-7567) please submit the pricing and availability form above to receive an up to date quote by email. If you agree to the pricing and terms you can e-sign your order online!

We are pleased to have the opportunity to serve you.

Have a Question

Hours:	08:00-18:00 Eastern Standard Time
Phone:	+1 470-231-0824
Email:	Contact Form »

Schedule B and Export

Schedule B: 8481400000
SITC: 74740
End Use: Industrial machines, other
NAICS: 332911
USDA: 1

Freight Class: Safety or relief valves