Model: 20318 ASSY 20318

Safety Relief Valve

Properties:

Flow Control Device

Disk

Bolt Hole Quantity

6 all ends

Maximum Operating Temp

425.0 degrees fahrenheit 1st response150.0 degrees fahrenheit 2nd response

Valve Operation Method

Automatic

Flange Shape

Round with holes all ends

Connection Type

Flange all ends

Valve Size

1.500 inches

Maximum Operating Pressure

150.0 pounds per square inch 1st response250.0 pounds per square inch 2nd response

Outside Diameter

5.062 inches all ends

Thickness

0.812 inches all ends

First Connection Face To Centerline Distance

4.750 inches

Bolt Hole Diameter

0.562 inches all ends

Second Connection Face To Centerline Distance

4.750 inches

Bolt Circle Diameter

3.938 inches all ends

Flange Face Design

Plain all ends

Material

Copper alloy bodynickel alloy flow control devicenickel alloy seatnickel alloy stem

Media For Which Designed

Steam 1st responsewater-oil-gas 2nd response

NSN

4820-01-363-2100

Part Number

20318 ASSY 20318

Description

Valve,safety Relief

CAGE

15187

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 20318 ASSY 20318 NSN 4820-01-363-2100

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:

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