Model: 1789-4NPT

Check Valve

Properties:

Pipe Size Accommodated
4.000 inches all ends
Thread Direction
Right-hand all ends
Flow Control Device
Disk
Renewable Seat Ring Type
Pressed-in
Maximum Operating Temp
450.0 degrees fahrenheit 2nd response
Maximum Operating Temp
450.0 degrees fahrenheit 1st response
Connection Style
Plain, optional end (pipe) all ends
Valve Operation Method
Automatic
Connection Type
Threaded internal pipe all ends
Mounting Position
Horizontal
Thready Qty Per Inch (tpi)
8 all ends
Maximum Operating Pressure
125.0 pounds per square inch 1st response
Maximum Operating Pressure
200.0 pounds per square inch 2nd response
Thread Size
4.000 inches 1st end
Material
Copper alloy flow control device
Material
Copper alloy seat
Material
Iron cast body
Media For Which Designed
Steam 1st response
Media For Which Designed
Water-oil-gas 2nd response
Style Designator
Angle
Thread Series Designator
Npt all ends
NSN
4820-00-906-0926
Part Number
1789-4NPT
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 1789-4NPT NSN 4820-00-906-0926

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: 8481302010
  • SITC: 74730
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

Freight Class: Check valves of iron

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