Model: 554

Check Valve

Properties:

Pipe Size Accommodated
0.375 inches 1st end
Thread Direction
Right-hand 1st end
Flow Control Device
Disk
Disk Loading Method
Weight
Maximum Operating Temp
550.0 degrees fahrenheit single response
Connection Style
Plain, optional end (pipe) 1st end
Valve Operation Method
Automatic
Connection Type
Threaded internal pipe 1st end
Mounting Position
Horizontal or vertical
Thready Qty Per Inch (tpi)
18 1st end
Maximum Operating Pressure
200.0 pounds per square inch 1st response
Maximum Operating Pressure
400.0 pounds per square inch 2nd response
Thread Size
0.375 inches 1st end
Material
Copper alloy flow control device
Material
Copper alloy seat
Material
Copper alloy body
Material Specification
Qq-c-390, alloy b5 federal specification single material response seat
Material Specification
Qq-c-390, alloy b5 federal specification single material response body
Media For Which Designed
Steam 1st response
Media For Which Designed
Water-oil-gas 2nd response
Style Designator
Straight thru
Thread Series Designator
Npt 1st end
NSN
4820-00-967-2853
Part Number
554
Description
Valve,check
CAGE
37239

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 554 NSN 4820-00-967-2853

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

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Schedule B and Export
  • Schedule B: 8481301090
  • SITC: 74730
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

Freight Class: Check valves of copper having a pressure rating of 850 kpa or over

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