Model: 20501-1

Safety Relief Valve

Properties:

Thread Class

3b all ends

Thread Direction

Right-hand all ends

Flow Control Device

Poppet

Disk Loading Method

Spring

Valve Discharge Flow Rate

3.0 gallons per minute

Connection Style

G4 gasket sea (boss) all ends

Connection Style

Gasket sea (boss) all ends

Valve Operation Method

Automatic

Connection Type

Threaded internal boss all ends

Mounting Facility

Threaded fastener

Features Provided

Pressure tight outlet side

Thready Qty Per Inch (tpi)

18 all ends

Adjustable Pressure Range

+300.0/+725.0 pounds per square inch

Adjustable Pressure Range

+300.0 to 725.0 pounds per square inch

Maximum Operating Pressure

725.0 pounds per square inch single response

Thread Size

0.562 inches all ends

Opening Pressure Setting

725.0 pounds per square inch

Media For Which Designed

Hydraulic fluid, phosphate-ester base single response

Test Data Document

00502-n20501 drawing (this is the basic governing drawing, such as a contractor drawing, original equipment manufacturer drawing, etc.; excludes any specification, standard or other document that may be referenced in a basic governing drawing)

Thread Series Designator

Unf all ends

NSN

4820-00-094-8123

Part Number

20501-1

Description

Valve,safety Relief

CAGE

81982

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes valve (1), relief, pressure and temperature.

Part 20501-1 NSN 4820-00-094-8123

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05488

FIIG:

A046B0

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:

Trailers/Vehicles

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Schedule B and Export

Schedule B: 8481400000
SITC: 74740
End Use: Industrial machines, other
NAICS: 332911
USDA: 1

Freight Class: Safety or relief valves