Model: MIL-V-18634

Safety Relief Valve

Special Features:

Reducing connector, 0.500 in. Nptf to 0.250 in. flare

Properties:

Thread Direction

Right-hand 2nd end

Thread Direction

Right-hand 1st end

Flow Control Device

Disk

Bonnet Type

Inside screw

Bonnet Attachment Method

Bolted

Disk Loading Method

Spring

Maximum Operating Temp

150.0 degrees fahrenheit single response

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

Pressure tight outlet side

Maximum Operating Pressure

400.0 pounds per square inch single response

Thread Size

0.500 inches 1st end

Thread Size

0.500 inches 2nd end

Opening Pressure Setting

128.0 pounds per square inch

Material

Copper alloy

Media For Which Designed

Steam single response

Thread Series Designator

Npt 2nd end

Thread Series Designator

Npt 1st end

Nondefinitive Specification/std Data

7 class and a style and 2 type

NSN

4820-01-148-6940

Part Number

MIL-V-18634

Description

Valve,safety Relief

CAGE

81349

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 MIL-V-18634 NSN 4820-01-148-6940

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:

594

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