Model: 21820 FN 61

Check Valve

Special Features:

Weapon system essential

Properties:

Flow Control Device
Ball
Disk Loading Method
Spring
End Application
Seawolf class ssn, sturgeon class ssn (637), nimitz class cvn, los angeles class ssn (688). C-17a airlifter, b-2 bomber (atb) aircraft. Mh-53e helicopter.
Valve Operation Method
Automatic
Connection Type
Unthreaded cartridge all ends
Mounting Position
Horizontal or vertical
Maximum Operating Pressure
3000.0 pounds per square inch single response
Criticality Code Justification
Feat
Material
Steel comp 303 body
Material
Steel comp 303 seat
Material
Steel comp 440c flow control device
Material Specification
Qq-s-763, class 440c, cond a federal specification single material response flow control device
Material Specification
Qq-s-764, type 303-canceled federal specification single material response body
Material Specification
Qq-s-764, type 303-canceled federal specification single material response seat
Surface Treatment
Passivate
Surface Treatment Specification
Mil-s-5002 military specification single treatment response
NSN
4820-00-706-4587
Part Number
21820 FN 61
Description
Valve,check
CAGE
78062

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 21820 FN 61 NSN 4820-00-706-4587

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:
ESD:
MMAC:
LE
CRITL:
Y

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
050855
UFC:
29290
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 8481302090
  • SITC: 74730
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

Freight Class: Check valves of steel

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