Safety Relief Valve NSN 4820-01-189-7581

Item Description

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.

NSN: 4820-01-189-7581

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Features and Characteristics

Flow Control Device

Disk

Bonnet Type

Inside screw

Bonnet Attachment Method

Bolted

Disk Loading Method

Spring

Bolt Hole Quantity

8 all ends

Valve Operation Method

Automatic

Flange Shape

Round with holes 2nd end

Connection Type

Flange all ends

Valve Size

4.000 inches

Adjustable Pressure Range

+72.0/+88.0 pounds per square inch

Maximum Operating Pressure

3300.0 pounds per square inch single response

Outside Diameter

9.000 inches 2nd end

Thickness

1.250 inches 2nd end

First Connection Face To Centerline Distance

8.438 inches

Bolt Hole Diameter

0.875 inches 1st end

Second Connection Face To Centerline Distance

8.500 inches

Bolt Circle Diameter

9.500 inches 1st end

Flange Face Design

Raised straight 2nd end

Raised Face Height

0.062 inches 2nd end

Raised Face Diameter

6.188 inches 2nd end

Special Features

Spring material corrosion resistant steel astm a313 (std)

Material

Stainless steel stem

Media For Which Designed

Liquid, ingested single response

Style Designator

Err-090

Furnished Items And Quantity

1 lever

FSC

4820 Nonpowered Valves

NIIN

011897581

NSN

4820011897581

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

R10AN5P513-CS1

Cage Code:

34889

Status:

MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov

Schedule B Number: 8481400000
NAICS: 332911
SITC: 74740
Description: Safety or relief valves
End Use (Code 21180):
Industrial machines, other

Q & A

Frequently asked questions for NSN 4820-01-189-7581

What are the manufacturers of nsn 4820011897581?

Hunt Valve Company Inc (34889)

Does this nsn 4820011897581 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 4820011897581
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.

Does nsn 4820011897581 contain any precious metals?
No precious metal content.

Does nsn 4820011897581 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 4820011897581?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)

INC

FIIG

App. Key

Cond. Code

Status

INC:

05488

FIIG:

A046B0

App. Key:

Cond. Code:

Status:

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Certificate of Conformance
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