Model: 1975C

Safety Relief Valve

Properties:

Pipe Size Accommodated

0.750 inches 2nd end

Pipe Size Accommodated

1.000 inches 1st end

Thread Direction

Right-hand 2nd end

Thread Direction

Right-hand 1st end

Flow Control Device

Poppet

Bonnet Type

Inside spring

Bonnet Attachment Method

Threaded

Disk Loading Method

Spring

Valve Discharge Flow Rate

270.0 pounds per hour

Connection Style

G46b plain (pipe) 2nd end

Connection Style

G9 plain, optional en (pipe) 1st end

Valve Operation Method

Automatic

Connection Type

Threaded external pipe 2nd end

Connection Type

Threaded internal pipe 1st end

Features Provided

Bonnet packing and pressure tight outlet side

Thready Qty Per Inch (tpi)

11-1/2 1st end

Thready Qty Per Inch (tpi)

14 2nd end

Maximum Operating Pressure

2000.0 pounds per square inch single response

Thread Size

0.750 inches 2nd end

Thread Size

1.000 inches 1st end

Opening Pressure Setting

110.0 pounds per square inch

Material

Stainless steel

Media For Which Designed

Steam single response

Thread Series Designator

Npt 2nd end

Thread Series Designator

Npt 1st end

Reference Number Differentiating Characteristics

As differentiatedby valve size and set pressure

NSN

4820-00-843-5743

Part Number

1975C

Description

Valve,safety Relief

CAGE

16497

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 1975C NSN 4820-00-843-5743

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