Model: 557-2A

Check Valve

Properties:

Flow Control Device
Disk
Disk Loading Method
Spring
Valve Operation Method
Automatic
Connection Type
Unthreaded external hose 1st end
Connection Type
Unthreaded external hose 2nd end
Mounting Position
Horizontal or vertical
Material
Aluminum alloy body
Material
Aluminum alloy seat
Style Designator
Straight thru
NSN
4820-00-486-1876
Part Number
557-2A
Description
Valve,check
CAGE
99551

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 557-2A NSN 4820-00-486-1876

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:
U
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
127220
UFC:
64490
LTL:
77.5
LCL:
77.5
WCC:
594
TCC:
Z
SHC:
9
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

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