Model: 525L

Restrictor Check Valve

Properties:

Pipe Size Accommodated

1.000 inches 2nd end

Thread Class

3a 1st end

Thread Direction

Right-hand 2nd end

Thread Direction

Right-hand 1st end

Flow Control Device

Disk

Connection Style

Plain (tube) 2nd end

Valve Operation Method

Automatic

Connection Type

Threaded external pipe 2nd end

Connection Type

Threaded external tube 1st end

Mounting Position

Horizontal

Thready Qty Per Inch (tpi)

11-1/2 2nd end

Thready Qty Per Inch (tpi)

14 1st end

Maximum Operating Pressure

10.0 pounds per square inch single response

Thread Size

1.312 inches 1st end

Thread Size

1.000 inches 2nd end

Seat Angle

37.0 degrees 1st end

Outside Diameter Tube Accommodated

1.000 inches 1st end

Material

Aluminum alloy body

Material

Rubber synthetic packing

Media For Which Designed

Fuel/oil, hydrocarbon single response

Surface Treatment

Anodize

Surface Treatment Specification

Mil-a-8625, type 2 military specification single treatment response

Style Designator

Straight thru

Thread Series Designator

Anpt 2nd end

Thread Series Designator

Un 1st end

NSN

4820-00-640-5635

Part Number

525L

Description

Valve,restrictor Check

CAGE

92003

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 525L NSN 4820-00-640-5635

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

127220

UFC:

64490

LTL:

77.5

LCL:

77.5

WCC:

594

TCC:

SHC:

ACC:

Equipment for Aircraft

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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