Model: MD3993

Check Valve

Properties:

Thread Direction
Right-hand all ends
Flow Control Device
Ball
Maximum Operating Temp
150.0 degrees fahrenheit 2nd response
Maximum Operating Temp
550.0 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
Maximum Operating Pressure
200.0 pounds per square inch 1st response
Maximum Operating Pressure
400.0 pounds per square inch 2nd response
Thread Size
0.250 inches all ends
Material
Copper alloy 922 body
Material
Copper alloy 922 seat
Material
Stainless steel flow control device
Material Specification
Qq-c-290, alloy d4 federal specification single material response body
Material Specification
Qq-c-390, alloy d4 federal specification single material response seat
Media For Which Designed
Steam 1st response
Media For Which Designed
Water-oil-gas 2nd response
Style Designator
Straight thru
Thread Series Designator
Npt all ends
Reference Number Differentiating Characteristics
As differentiated by valve size
NSN
4820-00-424-4432
Part Number
MD3993
Description
Valve,check
CAGE
76558

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 MD3993 NSN 4820-00-424-4432

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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
127220
UFC:
64490
LTL:
77.5
LCL:
--
WCC:
593
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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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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