Model: 859A-8BB

Check Valve

Properties:

Thread Class
3b all ends
Thread Direction
Right-hand all ends
Flow Control Device
Poppet
Maximum Operating Temp
-65.0 degrees fahrenheit 1st response
Maximum Operating Temp
275.0 degrees fahrenheit 2nd response
End Application
Sh-2g seasprite helicopter
Connection Style
Gasket seal (boss) all ends
Valve Operation Method
Automatic
Connection Type
Threaded internal boss all ends
Mounting Position
Horizontal or vertical
Thready Qty Per Inch (tpi)
16 all ends
Maximum Operating Pressure
600.0 pounds per square inch single response
Thread Size
0.750 inches all ends
Material
Aluminum alloy 2024 body
Material
Rubber butadiene-acrylonitrile class nbr seat
Media For Which Designed
Air 1st response
Media For Which Designed
Ethylene glycol 2nd response
Media For Which Designed
Fuel/oil, hydrocarbon 3rd response
Style Designator
Straight thru
Thread Series Designator
Unf all ends
NSN
4820-01-490-6343
Part Number
859A-8BB
Description
Valve,check
CAGE
91816

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 859A-8BB NSN 4820-01-490-6343

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:
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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