Model: 554

Check Valve

Properties:

Pipe Size Accommodated

0.500 inches 1st end

Thread Direction

Right-hand 1st end

Flow Control Device

Disk

Maximum Operating Temp

150.0 degrees fahrenheit 2nd response

Maximum Operating Temp

500.0 degrees fahrenheit 1st 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)

14 1st end

Maximum Operating Pressure

400.0 pounds per square inch 2nd response

Maximum Operating Pressure

200.0 pounds per square inch 1st response

Thread Size

0.500 inches 1st end

Material

Copper alloy seat

Material

Copper alloy 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

4820-00-203-7677

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 4820-00-203-7677

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05487

FIIG:

A530B0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

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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