Model: A390

Check Valve

Special Features:

Bronze disk, qq-c-390, faced w/nickel copper alloy, qq-n-281 or qq-n-288 not less than 1/8 in.Thk

Properties:

Flow Control Device
Poppet
Bolt Hole Quantity
6 all ends
Valve Operation Method
Automatic
Flange Shape
Round with holes all ends
Connection Type
Flange all ends
Mounting Position
Vertical
Maximum Operating Pressure
100.0 pounds per square inch single response
Outside Diameter
6.125 inches all ends
Thickness
0.500 inches all ends
First Connection Face To Centerline Distance
6.000 inches
Bolt Hole Diameter
0.562 inches all ends
Bolt Circle Diameter
5.000 inches all ends
Flange Face Design
Plain all ends
Material
Copper alloy 903 body
Material
Copper alloy 903 seat
Material
Nickel alloy flow control device or copper alloy flow control device
Material Specification
Qq-c-390, alloy d5/d/ federal specification single material response body
Material Specification
Qq-c-390, alloy d5/d/ federal specification single material response seat
Material Specification
Qq-n-281 federal specification 1st material response flow control device and qq-n-281 federal specification 2nd material response flow control device and qq-n-288 federal specification 3rd material response flow control device
Media For Which Designed
Water, fresh 2nd response
Media For Which Designed
Air 1st response
Style Designator
Straight thru
Nondefinitive Specification/std Data
B type and 1 class
NSN
4820-00-268-8786
Part Number
A390
Description
Valve,check
CAGE
03950

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 A390 NSN 4820-00-268-8786

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:
051080
UFC:
29300
LTL:
RATING VARIABLE
LCL:
--
WCC:
594
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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Schedule B and Export
  • Schedule B: 8481301010
  • SITC: 74730
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

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

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