Model: K1251MD4-25

Restrictor Check Valve

Properties:

Thread Class
3a all ends
Thread Direction
Right-hand all ends
Flow Control Device
Poppet
Disk Loading Method
Spring
Connection Style
Flared (tube) all ends
Valve Operation Method
Automatic
Connection Type
Threaded external tube all ends
Mounting Position
Horizontal or vertical
Maximum Operating Pressure
3000.0 pounds per square inch single response
Thread Size
0.437 inches all ends
Seat Angle
37.0 degrees all ends
Material
Plastic polytetrafluoroethylene packing or rubber packing
Material
Steel comp 303 body
Material
Steel comp 303 seat
Material
Steel comp 630 flow control device
Material Specification
66, aisi 303/sae 30303 federal standard single material response body
Material Specification
66, aisi 303/sae 30303 federal standard single material response seat
Material Specification
Ams 5643 assn standard single material response flow control device
Material Specification
Mil-p-25732 military specification 2nd material response packing
Media For Which Designed
Fuel/oil, hydrocarbon single response
Style Designator
Straight thru
Thread Series Designator
Unf all ends
NSN
4820-00-410-7530
Part Number
K1251MD4-25
Description
Valve,restrictor Check
CAGE
55469

A valve having an orifice in the poppet, disk, or the like, to permit restricted fluid flow when the valve is seated. It does not have a stem or provisions for pressure adjustments, and is similar to a valve, check with the exception of the orifice which permits fluid flow in more than one direction.

Part K1251MD4-25 NSN 4820-00-410-7530

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
20520
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:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.3000lbs
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:
051080
UFC:
29300
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 8481302090
  • SITC: 74730
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

Freight Class: Check valves of steel

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