Model: 21SN04-301-2

Check Valve

Special Features:

Switch attaches to check valve w/4 threaded fasteners

Properties:

Disk Loading Method

Spring

End Application

C-17a

Mounting Position

Vertical

Part Name Assigned By Controlling Agency

Assembly doubler valve

Material

Aluminum body

Media For Which Designed

Fuel/oil, hydrocarbon single response

Style Designator

Straight through drop-in cartridge

Supplementary Features

Flow control device: needle

Furnished Items And Quantity

2 cap and 1 relief plug

NSN

4820-01-473-0603

Part Number

21SN04-301-2

Description

Valve,check

CAGE

02750

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 21SN04-301-2 NSN 4820-01-473-0603

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:

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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