Model: 283684

Check Valve

Special Features:

Cleaned for aviators breathing oxygen

Properties:

Thread Class

3a all ends

Thread Direction

Right-hand all ends

Maximum Operating Temp

165.0 degrees fahrenheit single response

Minimum Operating Temp

-65.0 degrees fahrenheit

Connection Style

Flared (tube) all ends

Valve Operation Method

Automatic

Connection Type

Threaded external tube all ends

Mounting Position

Horizontal or vertical

Thread Size

0.437 inches all ends

Seat Angle

37.0 degrees all ends

Opening Pressure Setting

2.0 pounds per square inch

Part Name Assigned By Controlling Agency

Safety check valve

Material

Aluminum body

Material Specification

Qq-a-225/6 federal specification single material response body

Media For Which Designed

Oxygen, gaseous single response

Surface Treatment

Anodize

Style Designator

Straight thru

Thread Series Designator

Unf all ends

NSN

4820-01-453-2594

Part Number

283684

Description

Valve,check

CAGE

04577

A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

Part 283684 NSN 4820-01-453-2594

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05487

FIIG:

A530B0

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:

051080

UFC:

29300

LTL:

RATING VARIABLE

LCL:

WCC:

594

TCC:

SHC:

ACC:

Trailers/Vehicles

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Schedule B and Export

Schedule B: 8481309000
SITC: 74730
End Use: Industrial machines, other
NAICS: 332911
USDA: 1

Freight Class: Check valves of materials other than copper, iron or steel