Safety Relief Valve

940-2

940-2
(NSN) National Stock Number
4820-00-287-6029
Federal Supply Classification
4820 Nonpowered Valves
Item Name Code
05488
Schedule B Code
8481400000
Summary

1.000 inches 1st end nominal pipe size accommodated, right-hand 1st end thread direction, disk flow control device, spring disk loading method, plain (pipe) 1st end connection style, automatic or manual valve operation method

DAC HCC DMIL RNCC
5 - - C
RNVC SADC MSDS RNAAC
1 9F - ZZ
Identification

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.

INC FIIG Concept Condition
05488 A046B0 1 2
Specifications
Nominal Pipe Size Accommodated
1.000 inches 1st end
Details A measurement of the pipe size the item will accommodate.
Thread Direction
right-hand 1st end
Details The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.
Flow Control Device
disk
Details The part that controls the flow through the item.
Disk Loading Method
spring
Details The means of closing the item when inlet pressure decreases.
Connection Style
plain (pipe) 1st end
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.
Valve Operation Method
automatic or manual
Details The means used to control the operation of the valve.
Connection Type
threaded external pipe 1st end
Details Indicates the type of connection/s/.
Maximum Operating Pressure
100.0 pounds per square inch single response
Details The maximum pressure at which the item is rated for operation.
Nominal Thread Size
1.000 inches 1st end
Details A designation that is used for the purpose of general identification of the thread.
Opening Pressure Setting
3.0 pounds per square inch
Details The predetermined pressure at which the item is calibrated to open.
Material
copper alloy overall
Details The chemical compound or mechanical mixture properties of which the item is fabricated.
Media For Which Designed
steam single response
Details The type of media for which the item is designed.
Style Designator
straight thru
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the item.
Thread Series Designator
npt 1st end
Details A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
Master-Cross Reference List
Part CAGE DAC HCC RNCC RNVC MSDS RNAAC
FIG12SIZE1-3PSI 15187 6 - 3 2 - ZZ
FIG12SIZE1-3PSI 01343 6 - 5 9 - ZZ
940-2 12793 X - 5 9 - XX
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
HMIC PMIC ESD/EMI Criticality
N U - -
Freight
Universal / National Freight and Handling Information
UFC HMC LTL LCL
64490 - P -
RVC WCC TCC SHC
- 594 Z 9

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Manufacturer
AQUA-CHEM, INC. DBA AQUA-CHEM INC
CAGE: 0EXU3
KNOXVILLE , TN , 37914-6424
UNITED STATES
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FAQs
Frequently asked questions for NSN 4820-00-287-6029
What is the NIIN of the NSN 4820-00-287-6029?
The National Item Identification Number (NIIN) of the NSN 4820-00-287-6029 is 00-287-6029
When the NSN 4820-00-287-6029 was assigned to the Federal Catalog?
It was assigned 64 years ago, on Sun, Jan 1, 1961
Does the NSN 4820-00-287-6029 contain any precious metals?
Type/content is unknown
Does the NSN 4820-00-287-6029 contain any hazardous material?
No data in HMIRS

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