Safety Relief Valve
MMC41F18
(NSN) National Stock Number
4820-00-959-7298
Federal Supply Classification
4820 Nonpowered Valves
Item Name Code
05488
Schedule B Code
8481400000
Summary
0.750 inches 1st end nominal pipe size accommodated, 0.750 inches 2nd end nominal pipe size accommodated, right-hand 1st end thread direction, right-hand 2nd end thread direction, disk flow control device, inside spring bonnet type
| DAC | HCC | DMIL | RNCC |
|---|---|---|---|
| 6 | - | - | 5 |
| RNVC | SADC | MSDS | RNAAC |
|---|---|---|---|
| 2 | - | - | AX |
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
0.750 inches 1st end
Details
A measurement of the pipe size the item will accommodate.Nominal Pipe Size Accommodated
0.750 inches 2nd 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.Thread Direction
right-hand 2nd 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.Bonnet Type
inside spring
Details
Indicates the type of housing on the item that accommodates the stem packing or spring.Bonnet Attachment Method
threaded
Details
The means by which the bonnet is attached to the item.Disk Loading Method
spring
Details
The means of closing the item when inlet pressure decreases.Valve Discharge Flow Rate
342.0 pounds per hour
Details
The rated valve discharge capacity per unit of time.Connection Style
plain (pipe) 2nd end
Details
The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.Connection Style
plain,optional end(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 2nd end
Details
Indicates the type of connection/s/.Connection Type
threaded internal pipe 1st end
Details
Indicates the type of connection/s/.Features Provided
valve stem lock shield and pressure tight outlet side
Details
Those features,not otherwise specified,which may be required for proper functioning of the item.Maximum Operating Pressure
250.0 pounds per square inch single response
Details
The maximum pressure at which the item is rated for operation.Nominal Thread Size
0.750 inches 2nd end
Details
A designation that is used for the purpose of general identification of the thread.Nominal Thread Size
0.750 inches 1st end
Details
A designation that is used for the purpose of general identification of the thread.Opening Pressure Setting
125.0 pounds per square inch
Details
The predetermined pressure at which the item is calibrated to open.Material
copper alloy 836 body
Details
The chemical compound or mechanical mixture properties of which the item is fabricated.Material
copper alloy 836 seat
Details
The chemical compound or mechanical mixture properties of which the item is fabricated.Material
copper alloy flow control device
Details
The chemical compound or mechanical mixture properties of which the item is fabricated.Material
steel stem
Details
The chemical compound or mechanical mixture properties of which the item is fabricated.Material Document And Classification
qq-c-390,alloy b5/d fed spec single material response body
Details
The specification, standard, or manufacturer's reference and the classification designation, such as class, condition, temper, and the like, that identifies the material.Material Document And Classification
qq-c-390,alloy b5/d fed spec single material response seat
Details
The specification, standard, or manufacturer's reference and the classification designation, such as class, condition, temper, and the like, that identifies the material.Media For Which Designed
fuel/oil, hydrocarbon 1st response
Details
The type of media for which the item is designed.Media For Which Designed
steam 2nd response
Details
The type of media for which the item is designed.Media For Which Designed
water, fresh 3rd response
Details
The type of media for which the item is designed.Style Designator
angle
Details
The style designation indicating the configuration that most nearly corresponds to the appearance of the item.Thread Series Designator
npt 2nd 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.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 |
|---|---|---|---|---|---|---|---|
| 2606 | 14959 | 6 | - | 5 | 9 | - | AX |
| 1543-3/4IN. | 16497 | E | - | 5 | 9 | - | AX |
| 1543E-3/4IN 125PSI | 16497 | 6 | - | 3 | 9 | - | AX |
| 312 | 14915 | 6 | - | 5 | 9 | - | AX |
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
MARINETTE MARINE CORPORATION DBA MARINETTE MARINE CORP DIV FINCANTIERI - MARINETTE MARINE
CAGE: 98042
MARINETTE
, WI
, 54143-2434
UNITED STATES
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FAQs
Frequently asked questions for NSN 4820-00-959-7298
What is the NIIN of the NSN 4820-00-959-7298?
The National Item Identification Number (NIIN) of the NSN 4820-00-959-7298 is 00-959-7298
When the NSN 4820-00-959-7298 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Mon, Jan 1, 1962
Does the NSN 4820-00-959-7298 contain any precious metals?
Type/content is unknown
Does the NSN 4820-00-959-7298 contain any hazardous material?
No data in HMIRS
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