Model: K-1221-8-2

Restrictor Check Valve

Special Features:

Valve operation method: hydraulic

Properties:

Thread Class
3a 2nd end
Thread Class
3a 1st end
Thread Direction
Right-hand 2nd end
Thread Direction
Right-hand 1st end
Unable To Decode
Unable to decode and unable to decode
Flow Control Device
Poppet
Disk Loading Method
Spring
Renewable Seat Ring Type
Threaded
Connection Style
Flared (tube) 1st end
Connection Style
Flared (tube) 2nd end
Connection Type
Threaded external tube 1st end
Connection Type
Threaded external tube 2nd end
Mounting Facility
Bracket
Mounting Position
Horizontal or vertical
Thready Qty Per Inch (tpi)
16 1st end
Thready Qty Per Inch (tpi)
18 2nd end
Maximum Operating Pressure
35.0 pounds per square inch single response
Thread Size
0.562 inches 2nd end
Thread Size
0.750 inches 1st end
Seat Angle
37.0 degrees 1st end
Seat Angle
37.0 degrees 2nd end
Face To Face Distance
1.960 inches
Outside Diameter Tube Accommodated
0.375 inches 2nd end
Outside Diameter Tube Accommodated
0.500 inches 1st end
Material
Aluminum alloy 2024 body
Material
Steel comp 303 flow control device
Material Specification
66 federal standard single material response flow control device
Material Specification
Qq-a-225/6 federal specification single material response body
Media For Which Designed
Oil, hydraulic single response
Style Designator
Straight thru
Thread Series Designator
Unf 1st end
Thread Series Designator
Unf 2nd end
NSN
4820-00-715-4576
Part Number
K-1221-8-2
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 K-1221-8-2 NSN 4820-00-715-4576

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:
CRITL:
X

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Schedule B and Export
  • Schedule B: 8481309000
  • SITC: 74730
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

Freight Class: Check valves of materials other than copper, iron or steel

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