1543-3/4IN.
View detailed technical data, stock status, and sourcing information for: 1543-3/4IN.
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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.
disk flow control device, 0.750 inches 1st end nominal pipe size accommodated, right-hand 1st end thread direction, 0.750 inches 2nd end nominal pipe size accommodated, right-hand 2nd end thread direction
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Nominal Pipe Size Accommodated
- 0.750 inches 1st end
- Nominal Pipe Size Accommodated
- 0.750 inches 2nd end
- Thread Direction
- right-hand 1st end
- Thread Direction
- right-hand 2nd end
- Flow Control Device
- disk
- Bonnet Type
- inside spring
- Bonnet Attachment Method
- threaded
- Disk Loading Method
- spring
- Valve Discharge Flow Rate
- 342.0 pounds per hour
- Connection Style
- plain (pipe) 2nd end
- Connection Style
- plain,optional end(pipe) 1st end
- Valve Operation Method
- automatic or manual
- Connection Type
- threaded external pipe 2nd end
- Connection Type
- threaded internal pipe 1st end
- Features Provided
- valve stem lock shield and pressure tight outlet side
- Maximum Operating Pressure
- 250.0 pounds per square inch single response
- Nominal Thread Size
- 0.750 inches 2nd end
- Nominal Thread Size
- 0.750 inches 1st end
- Opening Pressure Setting
- 125.0 pounds per square inch
- Material
- copper alloy 836 body
- Material
- copper alloy 836 seat
- Material
- copper alloy flow control device
- Material
- steel stem
- Material Document And Classification
- qq-c-390,alloy b5/d fed spec single material response body
- Material Document And Classification
- qq-c-390,alloy b5/d fed spec single material response seat
- Media For Which Designed
- fuel/oil, hydrocarbon 1st response
- Media For Which Designed
- steam 2nd response
- Media For Which Designed
- water, fresh 3rd response
- Style Designator
- angle
- Thread Series Designator
- npt 2nd end
- Thread Series Designator
- npt 1st end
Related Parts
This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:
| Part Number | Name |
|---|---|
| 1543-3/4IN. | Safety Relief Valve |
| 1543E-3/4IN 125PSI | Safety Relief Valve |
| MMC41F18 | Safety Relief Valve |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 4820-00-959-7298?
Does the NSN 4820-00-959-7298 have a Schedule B code assigned?
Does NSN 4820-00-959-7298 require demilitarization?
Does NSN 4820-00-959-7298 contain precious materials?
Does NSN 4820-00-959-7298 contain hazardous materials?
When the NSN 4820-00-959-7298 was assigned to the Federal Catalog?
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