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.:
1
App. Key:
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
A
ESD:
A
MMAC:
BA
CRITL:
X

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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

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