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.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

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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